Home » Public Forums » GMCnet » [GMCnet] Caddy 500 / GMC Front Engine Mount
| [GMCnet] Caddy 500 / GMC Front Engine Mount [message #70902] |
Fri, 15 January 2010 20:04  |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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G'day,
I've compared the photographs of the 1968 - 1972 Caddy Eldorado single
rubber front mount:
http://www.gmcmhphotos.com/photos/showphoto.php?photo=3834
to the 1973 - 1976 Cadillac Eldorado dual rubber front mounts and the Dale
Fromm designed bracket:
http://www.gmcmhphotos.com/photos/showphoto.php?photo=32191
it appears that the front of the engine would be lower!
Is this an optical contusion or am I correct?
If I'm correct the engine would sit lower which would require a lower hatch
cover and I think that would be a good thing.
I don't know (obviously) if it would it change the alignment of the inner
and outer CV joints or create any other problems.
Regards,
Rob Mueller
Sydney, Australia
AUS '75 Avion-The Blue Streak TZE365V100428
USA '75 Avion-Double Trouble TZE365V100426
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Caddy 500 / GMC Front Engine Mount [message #70913 is a reply to message #70902] |
Fri, 15 January 2010 20:52  |
Kosier
Messages: 834
Registered: February 2008
Karma: 1
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Senior Member |
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Well Rob,
If you were to lower the front of the engine, you would also
lower
the final drive. This would necessitate raising the front ride
height
so as to maintain level halfshafts. This would increase the
speed
boat look, as well as changing the camber curve when leaning into
a corner. Not really a desirable thing, in my opinion.
Also, changing to a two-point front mount should include changing
to a single rear mount, as did Cadillac in 1973. Your call.
Sometimes, change is not really a good thing. Pun intended.
Gary Kosier
77EII & 77PB
Newark, Ohio
----- Original Message -----
From: "Rob Mueller" <robmueller@iinet.net.au>
To: <gmclist@temp.gmcnet.org>
Sent: Friday, January 15, 2010 9:04 PM
Subject: [GMCnet] Caddy 500 / GMC Front Engine Mount
G'day,
I've compared the photographs of the 1968 - 1972 Caddy Eldorado
single
rubber front mount:
http://www.gmcmhphotos.com/photos/showphoto.php?photo=3834
to the 1973 - 1976 Cadillac Eldorado dual rubber front mounts and
the Dale
Fromm designed bracket:
http://www.gmcmhphotos.com/photos/showphoto.php?photo=32191
it appears that the front of the engine would be lower!
Is this an optical contusion or am I correct?
If I'm correct the engine would sit lower which would require a
lower hatch
cover and I think that would be a good thing.
I don't know (obviously) if it would it change the alignment of
the inner
and outer CV joints or create any other problems.
Regards,
Rob Mueller
Sydney, Australia
AUS '75 Avion-The Blue Streak TZE365V100428
USA '75 Avion-Double Trouble TZE365V100426
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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GMCnet mailing list
List Information and Subscription Options:
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| Re: [GMCnet] Caddy 500 / GMC Front Engine Mount [message #70924 is a reply to message #70918] |
Fri, 15 January 2010 22:31 |
GMCWiperMan
Messages: 1248
Registered: December 2007
Karma: 1
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Senior Member |
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My deal in Macon, GA fell through as soon as I made contact with the seller:
He has only decorative items from the 3 '68 Eldorados he formerly owned.
:-(
I'll keep an eye on the Pull-a-Part in S. Atlanta when I'm going to visit my
daughter near there. They report a '71 Eldorado in inventory now, but it's
been there since Oct 09, so is probably pretty well stripped and headed for
the crusher. No telling when I'll be up there though.
Ken H.
Americus, GA
'76 X-Birchaven
www.gmcwipersetc.com
On Fri, Jan 15, 2010 at 10:18 PM, Kosier <gkosier@roadrunner.com> wrote:
> Rob,
>
> Don't worry about motormounts. If Ken doesn't come up with any,
> I've got some. We'll get you fixed up.
>
> Gary Kosier
> 77EII & 77PB
> Newark, Ohio
>
> ----- Original Message -----
> From: "Rob Mueller" <robmueller@iinet.net.au>
> To: <gmclist@temp.gmcnet.org>
> Sent: Friday, January 15, 2010 9:04 PM
> Subject: [GMCnet] Caddy 500 / GMC Front Engine Mount
>
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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| Re: [GMCnet] Caddy 500 / GMC Front Engine Mount [message #70968 is a reply to message #70913] |
Sat, 16 January 2010 14:18 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Gary,
Understood.
Two questions:
Could you not raise the rear ride height to compensate for the amount you
raised the front? That would be a good thing as you would have less tendency
to drag the bottom of the rear bumper and tear off sewerage pipes!
Why it would be necessary to change the rear mount to single point; would
four points be too rigid?
Regards,
Rob Mueller
Sydney, Australia
AUS '75 Avion-The Blue Streak TZE365V100428
USA '75 Avion-Double Trouble TZE365V100426
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Kosier
Sent: Saturday, 16 January 2010 1:52 PM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Caddy 500 / GMC Front Engine Mount
Well Rob,
If you were to lower the front of the engine, you would also Lower the final
drive. This would necessitate raising the front ride height so as to
maintain level halfshafts. This would increase the speed boat look, as well
as changing the camber curve when leaning into a corner. Not really a
desirable thing, in my opinion.
Also, changing to a two-point front mount should include changing to a
single rear mount, as did Cadillac in 1973. Your call.
Sometimes, change is not really a good thing. Pun intended.
Gary Kosier
77EII & 77PB
Newark, Ohio
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Caddy 500 / GMC Front Engine Mount [message #70969 is a reply to message #70924] |
Sat, 16 January 2010 14:20 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Ken,
What you don't want a nice Caddy wreath to stick on the GMC? ;-)
Regards,
Rob Mueller
Sydney, Australia
AUS '75 Avion-The Blue Streak TZE365V100428
USA '75 Avion-Double Trouble TZE365V100426
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Ken Henderson
Sent: Saturday, 16 January 2010 3:32 PM
To: gmclist
Subject: Re: [GMCnet] Caddy 500 / GMC Front Engine Mount
My deal in Macon, GA fell through as soon as I made contact with the seller:
He has only decorative items from the 3 '68 Eldorados he formerly owned.
:-(
Ken H.
Americus, GA
'76 X-Birchaven
www.gmcwipersetc.com
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Caddy 500 / GMC Front Engine Mount [message #70996 is a reply to message #70978] |
Sat, 16 January 2010 21:01 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
|
Senior Member |
|
|
Ken,
Yup, Ken taught me that trick!
Regards,
Rob Mueller
Sydney, Australia
AUS '75 Avion-The Blue Streak TZE365V100428
USA '75 Avion-Double Trouble TZE365V100426
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Ken Henderson
Sent: Sunday, 17 January 2010 9:33 AM
To: gmclist
Subject: Re: [GMCnet] Caddy 500 / GMC Front Engine Mount
GOSH! In my disappointment over the good pieces not being there, I
completely forgot I'll be needing one of those!
Re: Ride height: Gary's point about adjusting ride height is that changing
engine height also changes the angle of the drive axles. Remember that Ken
Frye sets ride height by putting a level on those axles.
Ken H.
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GMCnet mailing list
List Information and Subscription Options:
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Caddy 500 / GMC Front Engine Mount [message #71002 is a reply to message #70968] |
Sat, 16 January 2010 20:31 |
Kosier
Messages: 834
Registered: February 2008
Karma: 1
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Senior Member |
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Well, the reasoning has always been, if you jack up one corner OR
turn up
a steep driveway, the frame may flex enough to break something.
Or maybe
GM didn't manage to get everything welded together exactly
square.
"A milk stool is always solid".
Gary
----- Original Message -----
From: "Rob Mueller" <robmueller@iinet.net.au>
To: <gmclist@temp.gmcnet.org>
Sent: Saturday, January 16, 2010 3:18 PM
Subject: Re: [GMCnet] Caddy 500 / GMC Front Engine Mount
> Gary,
>
> Understood.
>
> Two questions:
>
> Could you not raise the rear ride height to compensate for the
> amount you
> raised the front? That would be a good thing as you would have
> less tendency
> to drag the bottom of the rear bumper and tear off sewerage
> pipes!
>
> Why it would be necessary to change the rear mount to single
> point; would
> four points be too rigid?
>
> Regards,
> Rob Mueller
> Sydney, Australia
> AUS '75 Avion-The Blue Streak TZE365V100428
> USA '75 Avion-Double Trouble TZE365V100426
>
>
> -----Original Message-----
> From: gmclist-bounces@temp.gmcnet.org
> [mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Kosier
> Sent: Saturday, 16 January 2010 1:52 PM
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] Caddy 500 / GMC Front Engine Mount
>
> Well Rob,
>
> If you were to lower the front of the engine, you would also
> Lower the final
> drive. This would necessitate raising the front ride height so
> as to
> maintain level halfshafts. This would increase the speed boat
> look, as well
> as changing the camber curve when leaning into a corner. Not
> really a
> desirable thing, in my opinion.
>
> Also, changing to a two-point front mount should include
> changing to a
> single rear mount, as did Cadillac in 1973. Your call.
>
> Sometimes, change is not really a good thing. Pun intended.
>
> Gary Kosier
> 77EII & 77PB
> Newark, Ohio
>
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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