GMCforum
For enthusiast of the Classic GMC Motorhome built from 1973 to 1978. A web-based mirror of the GMCnet mailing list.

Home » Public Forums » GMCnet » [GMCnet] Engine replacement
[GMCnet] Engine replacement [message #240715] Fri, 21 February 2014 08:35 Go to next message
glwgmc is currently offline  glwgmc   United States
Messages: 1014
Registered: June 2004
Karma: 10
Senior Member
This is the very reason I think it is so important for us to have an engine rebuilder score card. Anyone looking for a new engine should have the benefit of as much real world feedback as possible before making this very important decision. No need for elaborate details, just positive or negative feedback on the whole buying/ownership experience would be a great help. Think how beneficial it would be for - in this case Darryl - to have a couple a dozen or more feedback ratings on engines from several different engine rebuilders. Ratings in hand some quick phone calls would answer the question of how much and how long and they could have a path forward in a day or two. As it is now, everyone seems to have to go through a stressful selection process flying blind.

Ideally, some of our suppliers would offer a professional R&R service at a known price or price range instead of the current wide open "shop rate times shop hours pricing" so the GMC owner in need of a new engine could choose where to go having a good idea of what the total cost and total time would be to get the new engine of their choice in and their GMC back on the road.

Still in sunny Mexico on the beach with a so far very positive experience with the new S&J engine in the 78 Royale.....

Jerry
Jerry Work
The Dovetail Joint
Fine furniture designed and hand crafted in the 1907 former Masonic Temple building in historic Kerby, OR
Visitors always welcome!
glwork@mac.com
http://jerrywork.com
-----------------

Well, I've been chasing an engine noise for the last 5000 miles and finally figured it was time to do something about it. Took it down to JimK and, among other things, they ran a compression check that showed only 30lbs in #3 cylinder. A couple of squirts of oil brought it up to 60lbs. Their conclusion is that it's a bad piston or a broken ring and the fix is to pull the engine and rebuild it or replace it.

So I'm reluctantly in the market for a rebuilt engine. I know a couple of folks have installed engines from S and J in Spokane recently and seem happy with the experience. Does anyone have any long-term experience with S and J? Any bad experiences? Any other recommendations.

Darryl

-----------------------








Jerry Work
The Dovetail Joint
Fine furniture designed and hand crafted in the 1907 former Masonic Temple building in historic Kerby, OR
Visitors always welcome!
glwork@mac.com
http://jerrywork.com







_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist



Jerry & Sharon Work
78 Royale
Kerby, OR
Re: [GMCnet] Engine replacement [message #240761 is a reply to message #240715] Fri, 21 February 2014 14:25 Go to previous messageGo to next message
Darryl is currently offline  Darryl   United States
Messages: 144
Registered: December 2011
Location: Northern California
Karma: 0
Senior Member
Still in sunny Mexico on the beach with a so far very positive experience with the new S&J engine in the 78 Royale.....



Jerry

Thanks for the feedback on your S and J experience. That's probably the direction I will go mostly because I don't really know of anyone else except Jasper and JimB didn't have a good experience working with them. Some kind of scorecard or a collection of rating/recommendation comments would be a real help.

Darryl


Darryl Meyers 1978 Eleganza II El Dorado Hills, CA
Re: [GMCnet] Engine replacement [message #240784 is a reply to message #240715] Fri, 21 February 2014 17:30 Go to previous messageGo to next message
KB is currently offline  KB   United States
Messages: 1262
Registered: September 2009
Karma: 0
Senior Member
we've only got about 1700 miles on it so far, but I second S&J engines.
They were really good to work with and seem to know their stuff.

If I were doing it again, I might try to find a way to get them
an intake manifold and the tin work (oil pan, etc) so they
could do a sealed engine. It would have simplified installation
to already have that stuff installed. Not a big deal, but their
shop time in Spokane is a LOT cheaper than here in the SF Bay area.
On the other hand, doing it ourselves made it easy to install
Dick Paterson's block-off intake gasket kit.

Karen
1973 23'
1975 26'

_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist



Karen 1975 26' San Jose, CA
Re: [GMCnet] Engine replacement [message #240808 is a reply to message #240784] Fri, 21 February 2014 19:45 Go to previous messageGo to next message
mickeysss is currently offline  mickeysss   United States
Messages: 1476
Registered: January 2012
Karma: 0
Senior Member
where is s&j.


mickey anaheim ca. 90280 77 palm beach

off topic.

for those going to burning man tomorrow is the last day to register and feb 26 is when the tickets for $380 and one rv etc

go on sale from tomorrows registration. live while you can live. Modern world is here.

this guy is 86 years old and he goes. http://www.youtube.com/watch?v=w6UTnyp_h74


On Feb 21, 2014, at 3:30 PM, KB wrote:

> we've only got about 1700 miles on it so far, but I second S&J engines.
> They were really good to work with and seem to know their stuff.
>
> If I were doing it again, I might try to find a way to get them
> an intake manifold and the tin work (oil pan, etc) so they
> could do a sealed engine. It would have simplified installation
> to already have that stuff installed. Not a big deal, but their
> shop time in Spokane is a LOT cheaper than here in the SF Bay area.
> On the other hand, doing it ourselves made it easy to install
> Dick Paterson's block-off intake gasket kit.
>
> Karen
> 1973 23'
> 1975 26'
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

Re: [GMCnet] Engine replacement [message #240815 is a reply to message #240808] Fri, 21 February 2014 21:18 Go to previous messageGo to next message
pyolet is currently offline  pyolet   United States
Messages: 78
Registered: August 2006
Location: Helena, MT
Karma: 0
Member
S&J is in Spokane, WA. https://www.sandjengines.com When I spoke with them in January, they did not have any 455 cores, even tho the online order form showed they did, and needed my engine up front to overhaul. (I live 5 hrs from Spokane and wanted to make only one trip).

There are several other large volume "mail order" engine rebuilders in Spokane. MotorWorks is the one I used as they had a 455 core in the yard and seemed knowledgeable of big block Olds peculiars. http://www.motorworksengines.com So far, so good in the break-in process. I've overcome the cam break-in issues that are detailed in other threads here and have a couple hours run time getting the TBI/EBL dialed in.

Woody.
Re: [GMCnet] Engine replacement [message #240821 is a reply to message #240715] Fri, 21 February 2014 21:57 Go to previous messageGo to next message
Bob de Kruyff   United States
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
Senior Member
glwgmc wrote on Fri, 21 February 2014 07:35

This is the very reason I think it is so important for us to have an engine rebuilder score card. Anyone looking for a new engine should have the benefit of as much real world feedback as possible before making this very important decision. No need for elaborate details, just positive or negative feedback on the whole buying/ownership experience would be a great help. Think how beneficial it would be for - in this case Darryl - to have a couple a dozen or more feedback ratings on engines from several different engine rebuilders. Ratings in hand some quick phone calls would answer the question of how much and how long and they could have a path forward in a day or two. As it is now, everyone seems to have to go through a stressful selection process flying blind.

Ideally, some of our suppliers would offer a professional R&R service at a known price or price range instead of the current wide open "shop rate times shop hours pricing" so the GMC owner in need of a new engine could choose where to go having a good idea of what the total cost and total time would be to get the new engine of their choice in and their GMC back on the road.

Still in sunny Mexico on the beach with a so far very positive experience with the new S&J engine in the 78 Royale.....

Jerry
Jerry Work
The Dovetail Joint
Fine furniture designed and hand crafted in the 1907 former Masonic Temple building in historic Kerby, OR
Visitors always welcome!
glwork@mac.com
http://jerrywork.com
-----------------

Well, I've been chasing an engine noise for the last 5000 miles and finally figured it was time to do something about it. Took it down to JimK and, among other things, they ran a compression check that showed only 30lbs in #3 cylinder. A couple of squirts of oil brought it up to 60lbs. Their conclusion is that it's a bad piston or a broken ring and the fix is to pull the engine and rebuild it or replace it.

So I'm reluctantly in the market for a rebuilt engine. I know a couple of folks have installed engines from S and J in Spokane recently and seem happy with the experience. Does anyone have any long-term experience with S and J? Any bad experiences? Any other recommendations.

Darryl

-----------------------








Jerry Work
The Dovetail Joint
Fine furniture designed and hand crafted in the 1907 former Masonic Temple building in historic Kerby, OR
Visitors always welcome!
glwork@mac.com
http://jerrywork.com







_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist



Jerry, I just don't think that will work. There aren't enough replacements by any single supplier to make any kind of realistic differentiation. I also think that the best of the best will still have a failure sooner or later since any engine rebuild is fraught with potential for failure. What is probably more important is the level of service and responsiveness. It may actually turn out that the best rebuilders will no longer rebuild or replace engines since their reputation is at stake and they can't control the outcome. Look at how meticulous Ken H was with his rebuilds and the number of times he had to yank and rebuild. Also, on the road failures pretty well obviate any choice of preferred rebuilders.


Bob de Kruyff
78 Eleganza
Chandler, AZ
Re: [GMCnet] Engine replacement [message #240822 is a reply to message #240784] Fri, 21 February 2014 22:01 Go to previous messageGo to next message
Bob de Kruyff   United States
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
Senior Member
KB wrote on Fri, 21 February 2014 16:30

we've only got about 1700 miles on it so far, but I second S&J engines.
They were really good to work with and seem to know their stuff.

If I were doing it again, I might try to find a way to get them
an intake manifold and the tin work (oil pan, etc) so they
could do a sealed engine. It would have simplified installation
to already have that stuff installed. Not a big deal, but their
shop time in Spokane is a LOT cheaper than here in the SF Bay area.
On the other hand, doing it ourselves made it easy to install
Dick Paterson's block-off intake gasket kit.

Karen
1973 23'
1975 26'

_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist



I will take this seriously after you have 20k to 30k miles on your engine. How can you even remotely make a conclusion after 1700 miles??


Bob de Kruyff
78 Eleganza
Chandler, AZ
Re: [GMCnet] Engine replacement [message #240851 is a reply to message #240715] Sat, 22 February 2014 11:51 Go to previous messageGo to next message
KB is currently offline  KB   United States
Messages: 1262
Registered: September 2009
Karma: 0
Senior Member
> S&J is in Spokane, WA. https://www.sandjengines.com When I spoke with them in January, they did not have any 455 cores, even tho the online order form showed they did, and needed my engine up front to overhaul. (I live 5 hrs from Spokane and wanted to make only one trip).

interesting; I had talked to Motorworks first, but at that time (last May) they didn't
have a core. Guess it's luck of the draw.

The shipping to/from S&J was amazingly cheap I thought -- $125 each way
for the SF Bay area, so it could still be worth dealing with one of the
companies in Spokane even if you had to ship your engine to them first.
Plus if you ship them your engine, you could have them do a sealed build
(manifold, etc, already installed). The turnaround was fast; the normal
build only takes them 5 days.

Karen
1973 23'
1975 26'

_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist



Karen 1975 26' San Jose, CA
Re: [GMCnet] Engine replacement [message #240858 is a reply to message #240715] Sat, 22 February 2014 12:37 Go to previous messageGo to next message
KB is currently offline  KB   United States
Messages: 1262
Registered: September 2009
Karma: 0
Senior Member
Bob de Kruyff wrote:
> I will take this seriously after you have 20k to 30k miles on your engine. How can you even remotely make a conclusion after 1700 miles??

As I said: "They were really good to work with and seem to know their stuff."
That only refers to the experience I had working with them, and our impression
of the engine so far. They did what they said they'd do, and delivered on time.
Obviously the jury is still out regarding engine longetivity with so few miles,
which is why I included the caveat of mileage.

There's no call for hostility here.

Karen
1973 23'
1975 26'



_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist



Karen 1975 26' San Jose, CA
Re: [GMCnet] Engine replacement [message #312567 is a reply to message #240815] Sat, 28 January 2017 17:00 Go to previous messageGo to next message
pyolet is currently offline  pyolet   United States
Messages: 78
Registered: August 2006
Location: Helena, MT
Karma: 0
Member
Update. The MotorWorks reman 455 cratered this week with less than 10,000 miles on it and less than 3 years of service. #5 main bearing and/or 5 & 7 rod bearing(s) have failed, and possibly the crank thrust bearing, causing continuous knock...the 500 mile oil was full of ferrous and bearing material in the filter media. I've pampered this engine with oil changes every 3000 miles with zinc additive. My advise to any prospective engine buyer is to steer clear of any budget, cookie cutter engine builder such as this. You get what you pay for....and I got 9,500 miles for my $2600....not a good bargain. Getting a 455 core rebuilt at the Caddy 500 specialist shop in ABQ. More to follow. Woody.

1975 Avion 26' Transmode TZE365V100846 Helena, Montana EBL TBI, AL in man, in-tank pumps, AL rad, rear discs, Alcoas, Dakota Digital dash, all LED int and ext roof markers, Generac, Hubler torsion bars, Quadrabags, Manny tranny, 3.70, Zip Dee.
Re: [GMCnet] Engine replacement [message #312568 is a reply to message #312567] Sat, 28 January 2017 18:53 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
Senior Member
Woody,

I would highly recommend you remove your radiator and have the engine oil
cooler and transmission cooler cleaned by a shop that has one of these:

http://www.hotflusher.com/automotive/index.cfm

The engine failure scenario you describe matches a theory of why low mileage
rebuilds fail.

When an engine fails heaps of crap winds up in the engine oil cooler. It
restricts oil flow and increases the pressure on the bypass valve (opens at
5.3 - 6.3 psid) and allows unfiltered oil back into the engine.

I was going to do some testing to support that theory last year but it just
didn't happen for various reasons.

If you can't find a Hotflusher I'd suggest you take the radiator oil cooler
out of the loop and replace it with an oil cooler with a fan and thermostat
like this:

Tiny URL: http://tinyurl.com/gmna24a

Full URL:

https://www.amazon.com/70297-Cooler-Cooling-Automatic-Transmission/dp/B003TP
HHBI/ref=sr_1_fkmr0_2?s=automotive&ie=UTF8&qid=1485650732&sr=1-2-fkmr0&keywo
rds=B%26M+70297+Hi-Tek+SuperCooler+Oil+Cooler


Regards,
Rob M.
The Pedantic Mechanic
USAussie - Downunder
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808

-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Woody
Sent: Sunday, January 29, 2017 10:01 AM
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] Engine replacement

Update. The MotorWorks reman 455 cratered this week with less than 10,000
miles on it and less than 3 years of service. #5 main bearing and/or 5 & 7
rod bearing(s) have failed, and possibly the crank thrust bearing, causing
continuous knock...the 500 mile oil was full of ferrous and bearing
material in the filter media. I've pampered this engine with oil changes
every 3000 miles with zinc additive. My advise to any prospective engine
buyer is to steer clear of any budget, cookie cutter engine builder such as
this. You get what you pay for....and I got 9,500 miles for my
$2600....not a good bargain. Getting a 455 core rebuilt at the Caddy 500
specialist shop in ABQ. More to follow. Woody.
--
1975 Avion 26' Transmode
TZE365V100846 Helena, Montana
EBL TBI, AL in man, in-tank pumps, AL rad, rear discs, Alcoas, Dakota
Digital dash, all LED int and ext roof markers, Generac, Hubler torsion
bars,
Quadrabags, Manny tranny, 3.70, Zip Dee.


_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org


_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org



Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426
Re: [GMCnet] Engine replacement [message #312569 is a reply to message #312568] Sat, 28 January 2017 20:16 Go to previous messageGo to next message
James Hupy is currently offline  James Hupy   United States
Messages: 6806
Registered: May 2010
Karma: -62
Senior Member
A wise person once told me " You can get 20 years experience once, or, you
can get 1 years experience 20 times, the choice is yours." How many times
are members of this great GMC community going to experience catastrophic
engine failure caused by crap from the previously failed engine lodged in
the lines and oil cooler. A rattle can full of carb cleaner will not clean
it out. Neither will an ordinary air compressor "OSHA APPROVED" air nozzle.
You are better off removing the stock oil cooler and running without one. I
have no experience with the machine that Rob talks about, but S and J will
not warranty any of their engines unless new hoses and brand new previously
unused coolers are fitted. That is what I do when I install new engines. On
Jerry Work's Clasco coach that I installed an S & J engine in, I even
replaced the radiator with an aluminum one. Ask Jerry what he thinks.
Jim Hupy
Salem, Or
78 GMC ROYALE 403

On Jan 28, 2017 4:54 PM, "Rob Mueller" wrote:

> Woody,
>
> I would highly recommend you remove your radiator and have the engine oil
> cooler and transmission cooler cleaned by a shop that has one of these:
>
> http://www.hotflusher.com/automotive/index.cfm
>
> The engine failure scenario you describe matches a theory of why low
> mileage
> rebuilds fail.
>
> When an engine fails heaps of crap winds up in the engine oil cooler. It
> restricts oil flow and increases the pressure on the bypass valve (opens at
> 5.3 - 6.3 psid) and allows unfiltered oil back into the engine.
>
> I was going to do some testing to support that theory last year but it just
> didn't happen for various reasons.
>
> If you can't find a Hotflusher I'd suggest you take the radiator oil cooler
> out of the loop and replace it with an oil cooler with a fan and thermostat
> like this:
>
> Tiny URL: http://tinyurl.com/gmna24a
>
> Full URL:
>
> https://www.amazon.com/70297-Cooler-Cooling-Automatic-
> Transmission/dp/B003TP
> HHBI/ref=sr_1_fkmr0_2?s=automotive&ie=UTF8&qid=
> 1485650732&sr=1-2-fkmr0&keywo
> rds=B%26M+70297+Hi-Tek+SuperCooler+Oil+Cooler
>
>
> Regards,
> Rob M.
> The Pedantic Mechanic
> USAussie - Downunder
> USA '75 Avion - Double Trouble TZE365V100426
> USA '77 Kingsley - TZE 267V100808
>
> -----Original Message-----
> From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Woody
> Sent: Sunday, January 29, 2017 10:01 AM
> To: gmclist@list.gmcnet.org
> Subject: Re: [GMCnet] Engine replacement
>
> Update. The MotorWorks reman 455 cratered this week with less than 10,000
> miles on it and less than 3 years of service. #5 main bearing and/or 5 & 7
> rod bearing(s) have failed, and possibly the crank thrust bearing, causing
> continuous knock...the 500 mile oil was full of ferrous and bearing
> material in the filter media. I've pampered this engine with oil changes
> every 3000 miles with zinc additive. My advise to any prospective engine
> buyer is to steer clear of any budget, cookie cutter engine builder such as
> this. You get what you pay for....and I got 9,500 miles for my
> $2600....not a good bargain. Getting a 455 core rebuilt at the Caddy 500
> specialist shop in ABQ. More to follow. Woody.
> --
> 1975 Avion 26' Transmode
> TZE365V100846 Helena, Montana
> EBL TBI, AL in man, in-tank pumps, AL rad, rear discs, Alcoas, Dakota
> Digital dash, all LED int and ext roof markers, Generac, Hubler torsion
> bars,
> Quadrabags, Manny tranny, 3.70, Zip Dee.
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org

Re: [GMCnet] Engine replacement [message #312573 is a reply to message #240822] Sun, 29 January 2017 00:16 Go to previous messageGo to next message
George Beckman is currently offline  George Beckman   United States
Messages: 1085
Registered: October 2008
Location: Colfax, CA
Karma: 11
Senior Member
[quote title=Bob de Kruyff wrote on Fri, 21 February 2014 20:01]KB wrote on Fri, 21 February 2014 16:30


I will take this seriously after you have 20k to 30k miles on your engine. How can you even remotely make a conclusion after 1700 miles??


It is America, Bob. Karen can make the conclusions she wants. As a woman doing 95% of her own work plus writing excellent installation guides for us all, she has earned her stripes.

There is a pretty good reason I rarely read this forum.


'74 Eleganza, SE, Howell + EBL
Best Wishes,
George
Re: [GMCnet] Engine replacement [message #312574 is a reply to message #312569] Sun, 29 January 2017 01:19 Go to previous messageGo to next message
USAussie is currently offline  USAussie   United States
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
Senior Member
Gentlemen,

If one studies the oil flow path through the Olds 455 and 403 engine they
will find that the last thing the oil passes through is the filter.

As long as one installs the correct filter for these engines (no bypass in
the filter) metal from the failed engine cannot get into the new engine
because it must flow through the filter.

Review the following album:

http://www.gmcmhphotos.com/photos/g6398-455-2f-403-engine-oil-flow-path.html

Think about this; if crap in the oil cooler and lines took out Woody's
engine why did it take 3 years and near 10,000 miles?

In my opinion his engine was taken out because the pressure drop through the
oil cooler caused the bypass valve to remain partially open and some
unfiltered oil was constantly being fed back into the engine.

Regards,
Rob M.
The Pedantic Mechanic
USAussie - Downunder
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808


_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org



Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426
Re: [GMCnet] Engine replacement [message #312637 is a reply to message #240715] Mon, 30 January 2017 11:16 Go to previous messageGo to next message
jhbridges is currently offline  jhbridges   United States
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
Senior Member
A look at Bounds' current blog ought to be enough to steer you away from Jasper rebuilds.

--johnny


Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons. Braselton, Ga. I forgive them all, save those who hurt the dogs. They must answer to me in hell
Re: [GMCnet] Engine replacement [message #312642 is a reply to message #240715] Mon, 30 January 2017 12:34 Go to previous messageGo to next message
pyolet is currently offline  pyolet   United States
Messages: 78
Registered: August 2006
Location: Helena, MT
Karma: 0
Member
Rob, what makes you think the oil bypass is suspect? My airplane's Lycoming IO-540 has an oil bypass and it activates regularly and that doesn't destroy the bearings. My 455 was making metal and that wasn't caused by dirty oil...I change it religiously (10-40 Delo with zinc added) and there was no contamination in my cooling system from a previous failure. It was simply a 12mo/12,000 mile warranty budget engine that didn't last. There is no way to determine what failed until engine is torn down next week. Will keep the forum updated. BTW, I have that exact B&M cooler already on order, along with replacement Slaten oil lines.

I wasn't trying to place blame with my update. Just trying to get Jerry Work's builder score card started....so:

I got 3.4 miles per rebuild dollar on the MotorWorks 455 reman. That sucks any way you slice it and I did the R&R labor!! The current build underway should go 80,000 plus and that'd put it in the 13-14 miles per dollar range....acceptable. You get what you pay for and I got diddly squat in Spokane. Everyone's free to do what ever they can afford, but quality and details count with these 455's. Dick Patterson didn't have any built up 455's or I would've gone with him. The shop I'm using in ABQ will follow Mondello's build guide, dyno the engine for cam break in and data sheets, and it should be around $6k incl. labor with a lifetime warranty. Will keep you posted. Woody.



1975 Avion 26' Transmode TZE365V100846 Helena, Montana EBL TBI, AL in man, in-tank pumps, AL rad, rear discs, Alcoas, Dakota Digital dash, all LED int and ext roof markers, Generac, Hubler torsion bars, Quadrabags, Manny tranny, 3.70, Zip Dee.
Re: [GMCnet] Engine replacement [message #312645 is a reply to message #240715] Mon, 30 January 2017 17:14 Go to previous messageGo to next message
JohnL455 is currently offline  JohnL455   United States
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
Senior Member
Until Rob or one of his peers can scientifically define what is going on with the filtering and bypass systems it's all just armchair guessing. My Cinnabar 455 is going on maybe 7 years. No ticks/ no knocks. I had my radiator recored way back when I first got the coach. The PO installed rebuilt engine (some big box unit) died a little later due to sludge in pan (rod knock). I didn't do anything more with the radiator and don't remember being charged for add'l rad service with new engine. I use Rotella T6 and Wix

John Lebetski
Woodstock, IL
77 Eleganza II
Re: [GMCnet] Engine replacement [message #312657 is a reply to message #312642] Mon, 30 January 2017 21:39 Go to previous message
USAussie is currently offline  USAussie   United States
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
Senior Member
Woody,

In a nutshell I based my conclusions after spending countless hours studying
the oil flow path through the 455 and 403.

After doing so I formulated a test plan and spent $500 for a flowmeter, $250
for a PSID gage and another hundred bucks or so for lines and fittings. I
made a custom oil filter adapter that would allow me to force the bypass
valve in the oil filter adapter closed on a 455 with headers; which is what
I was going run the tests on. Unfortunately I was unable the test on that
engine so I shipped the test gear to Manny's. I stopped by his home on the
way back to Sydney only to discover my custom oil filter adapter would only
work with headers and his test set up has stock manifolds.

Unfortunately I have too much on my plate to spend a lot of time justifying
my theory, however, I will be attending the GMCMI Convention and I would be
more than happy to walk anyone who is interested through my theory step by
step.

Regards,
Rob M.
The Pedantic Mechanic
USAussie - Downunder
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808

-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Woody
Sent: Tuesday, January 31, 2017 5:35 AM
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] Engine replacement

Rob, what makes you think the oil bypass is suspect? My airplane's Lycoming
IO-540 has an oil bypass and it activates regularly and that doesn't
destroy the bearings. My 455 was making metal and that wasn't caused by
dirty oil...I change it religiously (10-40 Delo with zinc added) and there
was no contamination in my cooling system from a previous failure. It was
simply a 12mo/12,000 mile warranty budget engine that didn't last. There
is no way to determine what failed until engine is torn down next week.
Will keep the forum updated. BTW, I have that exact B&M cooler already on
order, along with replacement Slaten oil lines.

I wasn't trying to place blame with my update. Just trying to get Jerry
Work's builder score card started....so:

I got 3.4 miles per rebuild dollar on the MotorWorks 455 reman. That sucks
any way you slice it and I did the R&R labor!! The current build underway
should go 80,000 plus and that'd put it in the 13-14 miles per dollar
range....acceptable. You get what you pay for and I got diddly squat in
Spokane. Everyone's free to do what ever they can afford, but quality and
details count with these 455's. Dick Patterson didn't have any built up
455's or I would've gone with him. The shop I'm using in ABQ will follow
Mondello's build guide, dyno the engine for cam break in and data sheets,
and it should be around $6k incl. labor with a lifetime warranty. Will keep
you posted. Woody.


--
1975 Avion 26' Transmode
TZE365V100846 Helena, Montana
EBL TBI, AL in man, in-tank pumps, AL rad, rear discs, Alcoas, Dakota
Digital dash, all LED int and ext roof markers, Generac, Hubler torsion
bars,
Quadrabags, Manny tranny, 3.70, Zip Dee.


_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org


_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org



Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426
Previous Topic: [GMCnet] Engine replacement
Next Topic: [GMCnet] LP tank sending unit has no continuity
Goto Forum:
  


Current Time: Sun Sep 29 08:28:13 CDT 2024

Total time taken to generate the page: 0.00990 seconds