Home » Public Forums » GMCnet » [GMCnet] motor and transmission removal
| [GMCnet] motor and transmission removal [message #154672] |
Wed, 28 December 2011 15:51  |
Cameron Hong
Messages: 15
Registered: July 2009
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What is the best / easiest way to remove the motor and transmission
Bottom, top, front?
I have the space and the tools to take it out the front but I wanted to get
some suggestions on the steps for removal besides the obvious.
Is there any special bracing I should do?
Any help would be great
Thanks
Cameron
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| Re: [GMCnet] motor and transmission removal [message #154687 is a reply to message #154683] |
Wed, 28 December 2011 17:27  |
cameron
Messages: 10
Registered: December 2011
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Thank you
I am in Castro Valley CA. just east of SF
So you recommend dropping out the bottom.
That looked like a good idea but how high do I need to jack the rig up?
I was looking around and one guy dug a 3' hole to get his out.
I was thinking that since I am removing the transmission and the engine the front would work but if dropping out the bottom is easier, then it sounds good to me.
[Updated on: Wed, 28 December 2011 17:28] Report message to a moderator |
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| Re: [GMCnet] motor and transmission removal [message #154693 is a reply to message #154681] |
Wed, 28 December 2011 18:30 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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| cameron wrote on Wed, 28 December 2011 16:05 |
Also here are the particulars
1976 Palm Beach
I have owned it for three years and on the last trip it started to have less power than usual and was burning a ton of oil.
That is when I decided it was time to tear the motor down and rebuild.
I usually drive up to Tahoe in July so I need to get things going.
Has anyone done direct injection using the Rockwell intake?
That is also something I am going to do on this rebuild.
Smog is the only hic up though.
Also planning on putting in positraction.
I have done engine rebuilds and replacements on other cares but I must admit that this is not as straight forward
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Cameron, you can't do direct injection with any intake. Direct injection goes directly into the combustion chamber and requires a total system approach that just isn't feasible on the 455/403. If you are thinking port injection, now that's a different story and definitely is possible.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] motor and transmission removal [message #154698 is a reply to message #154672] |
Wed, 28 December 2011 19:04 |
g.winger
Messages: 792
Registered: February 2008
Location: Warrenton,Missouri
Karma: 0
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Senior Member |
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Cameron,,,,,,before you pull the engine you might consider finding out why you are burning oil and down on power. You can run a compression check or a leakdown test and find out the condition of the rings and valves. Good copression could indicate the rebuild is not neccesarry. Valve seals can be replaced without removing the motor. Lots of GMC owners have had a loss of power due to inop cintrifical advance in the dist. Would be sad to R+R the engine due to bad vacume lines or frozen weights in the dist. If you want me to explain how to R+R valve seals with the heads on let me know????,,,,PL
78 RB Royale
507 Caddy,Manny Tranny
Galvanized frame, Hubler Conversion
Not quite a new dash ,yet,,,,,,
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| Re: [GMCnet] motor and transmission removal [message #154700 is a reply to message #154681] |
Wed, 28 December 2011 19:04 |
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ljdavick
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
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In California you'll have to put the carburetor back on to pass smog, but that's only every other year. Port injection vs throttle body is an interesting choice, but I'm not sure what the benefit would be at our low RPM's. The GMC EFI group on google has been mostly discussing the Howell TBI with the DynamicEFI EBL that allows great flexibility in the fuel injection and spark control tables. Of course the EBL also works with multi-point fuel injection, so that might be helpful.
Somebody mentioned a vendor offering a new electronic fuel injection, was it Holley? In any case their offering didn't control spark (I believe) and that's half the battle...
If you will swap between fuel injection and a carb, then you'll have to somehow manage fuel pump pressure. Too much will certainly flood the carb and too little will kill your fuel injected engine's performance.
Larry Davick
Sent from my iPad
On Dec 28, 2011, at 3:05 PM, cameron <.net> wrote:
>
>
> Also here are the particulars
> 1976 Palm Beach
> I have owned it for three years and on the last trip it started to have less power than usual and was burning a ton of oil.
> That is when I decided it was time to tear the motor down and rebuild.
> I usually drive up to Tahoe in July so I need to get things going.
> Has anyone done direct injection using the Rockwell intake?
> That is also something I am going to do on this rebuild.
> Smog is the only hic up though.
> Also planning on putting in positraction.
> I have done engine rebuilds and replacements on other cares but I must admit that this is not as straight forward
> _______________________________________________
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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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| Re: [GMCnet] motor and transmission removal [message #154702 is a reply to message #154672] |
Wed, 28 December 2011 19:12 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Cameron,
I've done it all 3 ways: Out the top (actually through the door with a
long-armed engine hoist on my 23'); out the front, pulling the whole frame
clip; and, out the bottom, dropping the engine + transmission + final drive
together.
My preferred method is out the bottom all together, but I have a service
rack which makes that method much easier than if you have to jack (and
secure) the coach to achieve 30" under the main cross member.
If you also plan to do front end work, replace brake lines, etc., then
pulling the front clip would probably be best.
I didn't make photos of the out-the-bottom phase, but here's in-the-bottom:
http://www.gmcmhphotos.com/photos/showgallery.php?cat=3950
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI+ & EBL
www.gmcwipersetc.com
On Wed, Dec 28, 2011 at 4:51 PM, Cameron Hong <cameron.hong@comcast.net>wrote:
> What is the best / easiest way to remove the motor and transmission
>
> Bottom, top, front?
>
> I have the space and the tools to take it out the front but I wanted to get
> some suggestions on the steps for removal besides the obvious.
>
> Is there any special bracing I should do?
>
> Any help would be great
>
> Thanks
>
> Cameron
>
>
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Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] motor and transmission removal [message #154705 is a reply to message #154700] |
Wed, 28 December 2011 20:04 |
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hnielsen2
Messages: 1434
Registered: February 2004
Location: Alpine CA
Karma: 0
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Senior Member |
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On the FI it was MSD all in one unit without return line.
I'm running Howell and have for over seven plus years.
Very happy with our Howell.
Howard
----- Original Message -----
From: "Larry Davick" <ljdavick@comcast.net>
To: <gmclist@temp.gmcnet.org>
Sent: Wednesday, December 28, 2011 17:04
Subject: Re: [GMCnet] motor and transmission removal
> In California you'll have to put the carburetor back on to pass smog, but
> that's only every other year. Port injection vs throttle body is an
> interesting choice, but I'm not sure what the benefit would be at our low
> RPM's. The GMC EFI group on google has been mostly discussing the Howell
> TBI with the DynamicEFI EBL that allows great flexibility in the fuel
> injection and spark control tables. Of course the EBL also works with
> multi-point fuel injection, so that might be helpful.
>
> Somebody mentioned a vendor offering a new electronic fuel injection, was
> it Holley? In any case their offering didn't control spark (I believe)
> and that's half the battle...
>
> If you will swap between fuel injection and a carb, then you'll have to
> somehow manage fuel pump pressure. Too much will certainly flood the carb
> and too little will kill your fuel injected engine's performance.
>
> Larry Davick
> Sent from my iPad
>
> On Dec 28, 2011, at 3:05 PM, cameron <.net> wrote:
>
>>
>>
>> Also here are the particulars
>> 1976 Palm Beach
>> I have owned it for three years and on the last trip it started to have
>> less power than usual and was burning a ton of oil.
>> That is when I decided it was time to tear the motor down and rebuild.
>> I usually drive up to Tahoe in July so I need to get things going.
>> Has anyone done direct injection using the Rockwell intake?
>> That is also something I am going to do on this rebuild.
>> Smog is the only hic up though.
>> Also planning on putting in positraction.
>> I have done engine rebuilds and replacements on other cares but I must
>> admit that this is not as straight forward
>> _______________________________________________
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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All is well with my Lord
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| Re: [GMCnet] motor and transmission removal [message #154760 is a reply to message #154723] |
Thu, 29 December 2011 12:56 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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Somebody will put a Detroit Locker in one of them one day. For about five miles and one turn.
--johnny
'76 23' transmiode norris
'76 palm beach
________________________________
From: Dolph Santorine <dolph@dolphsantorine.com>
To: gmclist@temp.gmcnet.org
Sent: Wednesday, December 28, 2011 10:49 PM
Subject: Re: [GMCnet] motor and transmission removal
I love the acronym for limited slip differential.
That's about what my wife thinks I'm doing out under the motorhome on a 45 degree day.
Dolph
On Dec 28, 2011, at 9:35 PM, Rob Mueller wrote:
> Karen,
>
> I believe you are correct and this is what "Positraction" refers to:
>
> http://www.appliedgmc.com/prod.itml/icOid/876
>
> Regards,
> Rob M.
>
> -----Original Message-----
> From: KB
>
>> Also planning on putting in positraction.
>
> Positraction? Are we talking about a limited slip final drive, or is this a new adaptation??
>
> thanks,
> Karen
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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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
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