Home » Public Forums » GMCnet » Engine knocking (Engine rebuilding advice?)
| Engine knocking [message #89495] |
Tue, 22 June 2010 09:03  |
Robert
Messages: 40
Registered: November 2009
Location: Jordan Mn.
Karma: 0
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After countless hours of preperation for our family trip to Colorado we made it about 30 miles and the engine developed a nasty knock. My dad and brother brought us our Yukon which we continued on with and dad got our coach towed back. My kids were disapointed but got over it quick.
My brother is a mechanic so we are planning on doing the rebuild ourselves. We pulled the tranny last night and hope to have the motor out tonight.
I am not sure if this is a dumb question but I am wondering if this is standard rebuild or if anyone has any pitfalls or potential problems to avoid. Or any performance upgrades that your happy with. Any info would be much appreciated.
Here's a list of things that I did to our coach this spring leading up to our trip and many thanks to all of the suppliers that helped me through these projects.
- Honda seats
- New toilet
- Rebuilt drive axles
- Jim k's phase II 6 wheel disk brake kit
- Rebuilt onan control board
- 1 rear spindle
- A arm bushings
- Driver and passenger window seals
- Stainless air tank and new pressure switch
- New rear ride height control valves
- Compressor rebuild
- Front wheel bearings
Thanks for all your Help
Bob Mahowald
75 Glenbrook
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| Re: [GMCnet] Engine knocking [message #89497 is a reply to message #89495] |
Tue, 22 June 2010 09:19  |
Sandra Price
Messages: 709
Registered: May 2006
Karma: 1
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Senior Member |
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Bob, it will be a standard rebuild, but you can't buy a factory stock
camshaft. Also, check the taper in the bore. If it has any taper
whatsoever, have it bored. I had my engine rebuilt just before leaving home
on May 3 on a trip from TX to The Maritimes. Three friends and I R&R'd the
engine. Only problem we have had was one bad push rod, which I was able to
replace while parked in VA.
In the rebuild we replaced all push rods, all rocker arms, and all stands.
I know you and your family are disappointed. Hope your R&R goes well.
Bob Price
On Tue, Jun 22, 2010 at 9:03 AM, Bob Mahowald <
mahowaldcabinet@frontiernet.net> wrote:
>
>
> After countless hours of preperation for our family trip to Colorado we
> made it about 30 miles and the engine developed a nasty knock. My dad and
> brother brought us our Yukon which we continued on with and dad got our
> coach towed back. My kids were disapointed but got over it quick.
>
> My brother is a mechanic so we are planning on doing the rebuild ourselves.
> We pulled the tranny last night and hope to have the motor out tonight.
>
> I am not sure if this is a dumb question but I am wondering if this is
> standard rebuild or if anyone has any pitfalls or potential problems to
> avoid. Or any performance upgrades that your happy with. Any info would be
> much appreciated.
>
> Here's a list of things that I did to our coach this spring leading up to
> our trip and many thanks to all of the suppliers that helped me through
> these projects.
> - Honda seats
> - New toilet
> - Rebuilt drive axles
> - Jim k's phase II 6 wheel disk brake kit
> - Rebuilt onan control board
> - 1 rear spindle
> - A arm bushings
> - Driver and passenger window seals
> - Stainless air tank and new pressure switch
> - New rear ride height control valves
> - Compressor rebuild
> - Front wheel bearings
>
> Thanks for all your Help
>
> Bob Mahowald
> 75 Glenbrook
>
>
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
IN GOD WE TRUST!
Sandra and Bob in the 51st Year of our State of Marriage
“Life’s a Trip” in “The Roadhouse”
’73 Painted Desert
Huntsville, TX
Finally, all of you, live in harmony with one another, be sympathetic, love
as brothers, be compassionate and humble. Do not repay evil with evil or
insult with insult, but with blessing, because to this you were called so
that you may inherit a blessing. --1 Peter 3:8-9
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| Re: [GMCnet] Engine knocking [message #89503 is a reply to message #89495] |
Tue, 22 June 2010 10:33 |
Dennis S
Messages: 3046
Registered: November 2005
Karma: 2
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Senior Member |
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Bob,
Sorry to hear about your engine issue...
Here is SteveF's excellent photo album on engine rebuilding.
http://www.gmcmhphotos.com/photos/showgallery.php?cat=3100
Good reading on the GMCEast site by LarryW and others
http://gmceast.com/technical/
Good luck,,,
Dennis Sexton
73 GMC
Germantown, TN
USA
-----Original Message-----
From: Bob Mahowald <mahowaldcabinet@frontiernet.net>
To: gmclist@temp.gmcnet.org
Sent: Tue, Jun 22, 2010 9:03 am
Subject: [GMCnet] Engine knocking
After countless hours of preperation for our family trip to Colorado we made it
bout 30 miles and the engine developed a nasty knock. My dad and brother
rought us our Yukon which we continued on with and dad got our coach towed
ack. My kids were disapointed but got over it quick.
My brother is a mechanic so we are planning on doing the rebuild ourselves. We
ulled the tranny last night and hope to have the motor out tonight.
I am not sure if this is a dumb question but I am wondering if this is standard
ebuild or if anyone has any pitfalls or potential problems to avoid. Or any
erformance upgrades that your happy with. Any info would be much appreciated.
snip
ob Mahowald
5 Glenbrook
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MCnet mailing list
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Dennis S
73 Painted Desert 230
Memphis TN Metro
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| Re: Engine knocking [message #89510 is a reply to message #89504] |
Tue, 22 June 2010 11:34 |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
Karma: 0
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Senior Member |
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Bob,
I just did a rebuild with the help of a friend who rebuilds a lot of engines. everything from flathead fords to racing engines.
He also is in tight with a very good machine shop that knows their stuff.
The Olds engine is weird, there are many strange things about it.
There are very few knowledgeable people. Jim B is good, but doesn't really sell parts.
For parts there is Mondello and another place, FastOlds or something? Mondello is a con man, they try and sell you stuf you don't need. like oil restrictors, like special cam bearings. Mondello builds race engines, engines that rev. Motorhome engines don't rev, it's a different build.
Go to the other guys if at all possible
( I can look for their name tonight if you need me to )
It is possible if you have access to the right people.
Not something I'd build for my first engine...
Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
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| Re: Engine knocking [message #89513 is a reply to message #89495] |
Tue, 22 June 2010 12:24 |
kingd
Messages: 592
Registered: June 2004
Karma: 2
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Senior Member |
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And things like, if the heads need hardened valve seats, there are special Oldsmobile inserts. There have been lots of posts on here about heads being ruined(unrepairable) while being machined for Chevy inserts. Some would say ONLY the shops very knowledgable about Oldsmobiles know there are special Olds seats.
I'm pretty sure if you read all the articles available from different GMC folks, you can find all the RIGHT Oldsmobile processes.
DAVE KING
DAVE KING
lurker, wannabe
Toronto, Ontario, Canada
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| Re: [GMCnet] Engine knocking [message #89590 is a reply to message #89510] |
Wed, 23 June 2010 07:01 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Mondello is a con man, they try and sell you stuf you don't need. like oil
restrictors, like special cam bearings. Mondello builds race engines,
engines that rev. Motorhome engines don't rev, it's a different build.
careful,
I can name you several GMCs that have lost the rear mains because of
pooling of oil in the valve covers. ( two of the lost engines were going
down hill into Los Vegas, and the tranny shifted down(passing;>) - over
reving the GMC.
I believe in the restrictors, and many of Monello's techniques, unless you
do some extensive machining in the 455 like Dick Patterson does. You should
see Dick's 100 slide presentation some time, of the modifications he makes
to a 455 rebuild.
A long-lived 455, is not just a standard rebuild.
gene
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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| Re: Engine knocking [message #89591 is a reply to message #89581] |
Wed, 23 June 2010 07:07 |
fred v
Messages: 999
Registered: April 2006
Location: pensacola, fl.
Karma: 0
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| Robert wrote on Tue, 22 June 2010 23:00 |
Thanks for all the responses. It sounds like I need to talk to my machine shop to see if he is familiar with the Olds 455.
The transmission and engine removal went suprisingly well.
Thanks again
Bob Mahowald
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one problem is that the Olds block has to have plates bolted to the top of the cyl. banks to control warping during the boring job. many shops will tell you that it isn't needed because they don't have them.
Fred V
'77 Royale RB 455
P'cola, Fl
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| Re: [GMCnet] Engine knocking [message #89597 is a reply to message #89590] |
Wed, 23 June 2010 08:25 |
k2gkk
Messages: 4452
Registered: November 2009
Karma: -8
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Senior Member |
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Not that I am in the market for a rebuild, but
just for possible future reference, can or will
ANYBODY name the outfits that actually rebuild
these "LONG-LIVED" 455s?
* * * * * * * * *
* Mac Macdonald *
* Oklahoma City *
** "Money Pit" **
* '76 ex - P.B. *
* * * * * * * * *
Date: Wed, 23 Jun 2010 05:01:55 -0700
From: mr.erfisher@gmail.com
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Engine knocking
Begin quoted message
Mondello is a con man, they try and sell you stuf you don't need. like oil
restrictors, like special cam bearings. Mondello builds race engines,
engines that rev. Motorhome engines don't rev, it's a different build.
End quoted message
careful,
I can name you several GMCs that have lost the rear mains because of
pooling of oil in the valve covers. ( two of the lost engines were going
down hill into Los Vegas, and the tranny shifted down(passing;>) - over
reving the GMC.
I believe in the restrictors, and many of Monello's techniques, unless you
do some extensive machining in the 455 like Dick Patterson does. You should
see Dick's 100 slide presentation some time, of the modifications he makes
to a 455 rebuild.
A long-lived 455, is not just a standard rebuild.
gene
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| Re: [GMCnet] Engine knocking [message #89612 is a reply to message #89597] |
Wed, 23 June 2010 10:24 |
Rick Denney
Messages: 430
Registered: January 2004
Karma: 0
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Senior Member |
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| k2gkk wrote on Wed, 23 June 2010 09:25 |
Not that I am in the market for a rebuild, but
just for possible future reference, can or will
ANYBODY name the outfits that actually rebuild
these "LONG-LIVED" 455s?
|
Here's one:
http://www.springfield-ignition.com/
I've never heard a negative word about one of Dick's engines, or the service he provides for them.
Also, the Jasper engines specified by Jim Bounds provide an alternative at a lower price point, and so far so good from reports I've heard. These are not the standard Jasper rebuilds by any means, and they can only be bought by arrangement through the GMC Co-op, from a Jasper installer.
Rick "whose usage level suggests durability measured in years more than miles" Denney
'73 Glacier 230 "Jaws"
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| Re: [GMCnet] Engine knocking [message #89659 is a reply to message #89612] |
Wed, 23 June 2010 21:28 |
shawnee
Messages: 422
Registered: February 2004
Location: NC
Karma: 0
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| Rick Denney wrote on Wed, 23 June 2010 11:24 |
| k2gkk wrote on Wed, 23 June 2010 09:25 |
Not that I am in the market for a rebuild, but
just for possible future reference, can or will
ANYBODY name the outfits that actually rebuild
these "LONG-LIVED" 455s?
|
Here's one:
http://www.springfield-ignition.com/
I've never heard a negative word about one of Dick's engines, or the service he provides for them.
Also, the Jasper engines specified by Jim Bounds provide an alternative at a lower price point, and so far so good from reports I've heard. These are not the standard Jasper rebuilds by any means, and they can only be bought by arrangement through the GMC Co-op, from a Jasper installer.
Rick "whose usage level suggests durability measured in years more than miles" Denney
|
I can second your praise for Dick Paterson's engine rebuild. He rebuilt my 455 about 13 years ago and it has 70,000+ miles on it with also his carb and distributor. Still runs smooth as silk and hardly uses any oil. He also had my header flanges smoothed and installed them without a gasket. No leaks to date. He also adds several horse power to the engine when he rebuilds it. His engines now are better than mine so if you want an exceptional rebuild, his is the one. I wouldn't go any where else.
Gene Dotson
74 Canyonlands
www.bdub.net/Motorhome_Enhancements New Windows and Aluminum Radiators
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