New motor mounts

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Feb 28, 2023 | 06:15 AM

MarkB85vette

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From: Corpus Christi Texas

New motor mounts

Hello all,
hope all is well. My question is can I replace motor mounts without pulling the exhaust manifolds? Not many videos on line. Thanks in advance.
Mark

Feb 28, 2023 | 07:44 AM

rremesal

Burning Brakes

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From: Florida

Quote:

Originally Posted by MarkB85vette

Hello all,
hope all is well. My question is can I replace motor mounts without pulling the exhaust manifolds? Not many videos on line. Thanks in advance.
Mark

You don't have to pull the manifolds. However, you do have to disconnect the exhaust from the manifolds, so you can raise the engine a bit without binding the entire exhaust system.
That's what I did on my 96.

If you have a TPI engine, you do have to be careful with the rear mounted distributor, as it may hit the firewall/cowl area. Perhaps removing the distributor cap will give you extra room.

Ric

Feb 28, 2023 | 10:20 PM

flyboyslc1

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From: IOWA!!!

Maybe?

Quote:

Originally Posted by MarkB85vette

Hello all,
hope all is well. My question is can I replace motor mounts without pulling the exhaust manifolds? Not many videos on line. Thanks in advance.
Mark

Well, short answer is maybe. If you have a FSM check the recommended procedure and see what it says. The 85 model year May not have as much stuff in the way as my 91 did? I had a 91L98 and I think the FSM said it could be done without removal of the manifolds. But when I dug into it, it just seemed easier to remove the manifolds. I did do a vid, if it helps.

Mar 1, 2023 | 06:00 AM

MarkB85vette

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From: Corpus Christi Texas

Thanks brother, your video was the one I did see on YouTube. I think I will be removing the manifolds. FSM says you don't have to but it looks daunting with them in place. Thanks for the reply.
Mark

Mar 1, 2023 | 06:46 AM

rremesal

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From: Florida

A word of advice, removing the manifolds is something you may regret.

DO NOT break a bolt/stud. 😉

Mar 1, 2023 | 07:58 AM

flyboyslc1

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Quote:

Originally Posted by rremesal

A word of advice, removing the manifolds is something you may regret.

DO NOT break a bolt/stud. 😉

Always that risk on working an old car. Mine came out easily. Put them all back with new exhaust man gaskets and a little anti size on the studs. If you have trouble with a stuck bolt lots of good info on YouTube

Mar 1, 2023 | 08:31 AM

MarkB85vette

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From: Corpus Christi Texas

[QUOTE=flyboyslc1;1606333083]Always that risk on working an old car. Mine came out easily. Put them all back with new exhaust man gaskets and a little anti size on the studs. If you have trouble with a stuck bolt lots of good info on YouTube[/QUOTE

Thanks for the advice. I am pretty sure the motor mounts are original, so the payoff of new mounts I think out weighs the risk of issues removing the manifolds. I have rebuilt all
of the fuel delivery system and the entire intake. Also new valve seals. I have the old girl running well, but I think new mounts will smooth out things a bit.

Mar 2, 2023 | 04:04 PM

Whaleman

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From: LeClaire Iowa

For myself, I would be sure there was a problem with the mounts now before attacking this. Dan

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Mar 2, 2023 | 04:14 PM

MarkB85vette

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Quote:

Originally Posted by Whaleman

For myself, I would be sure there was a problem with the mounts now before attacking this. Dan

Agreed, the transmission mount is in poor shape and will replace that first. I plan to attempt some photos of the engine mounts first. When I get those I will post them here for analysis. I really appreciate all of the feedback

Mar 2, 2023 | 07:10 PM

#10

flyboyslc1

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Quote:

Originally Posted by Whaleman

For myself, I would be sure there was a problem with the mounts now before attacking this. Dan

One thing you can check for is the clearance between the crank harmonic balancer and the frame crossmember. Mine was so tight that I could not get the serp belt between the two. Once the new mounts were installed, I could then do so.

Mar 2, 2023 | 07:31 PM

#11

MarkB85vette

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Quote:

Originally Posted by flyboyslc1

I noticed you mentioned that in your video. My clearance is good, no issues getting the belt off or on. I think I can get some photos tomorrow if I get time to work one her. Thanks for the input. The mounts came today in the mail. If the old ones appear decent, I will save the new ones for when I pull the motor for a rebuild. I retire soon from the Army and plan to do a complete rebuild so I can learn, and so the car can truly be restored and improved.

Mar 2, 2023 | 11:59 PM

#12

383vett

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Quote:

Originally Posted by MarkB85vette

transmission mount?

Mar 3, 2023 | 05:34 AM

#13

Ray Quayle

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Quote:

Originally Posted by 383vett

transmission mount?

I was thinking the same thing!

Mar 4, 2023 | 09:28 PM

#14

MarkB85vette

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Quote:

Originally Posted by Ray Quayle

I was thinking the same thing!

maybe I have the wrong name, but there is a cross member that goes under the transmission not too far from the drive shaft that has a bushing, or mount, that combined with the 2 motor mounts, holds the drive train in place

Mar 4, 2023 | 11:21 PM

#15

383vett

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Quote:

Originally Posted by MarkB85vette

You do have a C4 right?

Mar 5, 2023 | 12:50 AM

#16

MarkB85vette

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Quote:

Originally Posted by 383vett

You do have a C4 right?

I do, 1985, with the confusion I seem to have created, what is the rubber bushing like thing called that holds the transmission in place?

Mar 5, 2023 | 12:58 AM

#17

MarkB85vette

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I have attached a photo of what fits the 700R4 transmission. Maybe I have the wrong name for the transmission,

This is what I have

Mar 5, 2023 | 07:56 AM

#18

Ray Quayle

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Quote:

Originally Posted by 383vett

You do have a C4 right?

It’s like you’re reading my mind!

Mar 5, 2023 | 07:59 AM

#19

Ray Quayle

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Quote:

Originally Posted by MarkB85vette

I have attached a photo of what fits the 700R4 transmission. Maybe I have the wrong name for the transmission,

This is what I have

It would be far more useful to see a picture of the trans in the car. There is a bushing in the exhaust hanger that is bolted to the trans?

Mar 5, 2023 | 08:45 AM

#20

MarkB85vette

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From: Corpus Christi Texas

Quote:

Originally Posted by Ray Quayle

It would be far more useful to see a picture of the trans in the car. There is a bushing in the exhaust hanger that is bolted to the trans?

correct, that is what I am discussing here. I may have time soon to dig into this later today. But based on what I see on the car and where I want to go, this item is an upgrade to urethane. When I do, I will photo what I see and the condition of the motor mounts as well. Uploading them
here for analysis. More to follow. Thanks for the support

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