Another motormount problem...

[LWillmann]

Swapping from Oldsmobile engine to SBC in my 88 Cutlass.

Have the clamshells mounted in the proper place, per recommendations here and another site.

I do not know if I have...
A) the right block side engine mounts;
or
B) if I do have the right ones, I think I have them mounted on the wrong side of the engine.

We went to drop the engine in the car last night, and couldn't get the mounts to line up right. We got the passenger side to line up, but not the driver side.

Here are two pictures where you can see the block side of the mounts, and see they they are different.





Now, here you can see how they look in the car (in the same order):







Now... Here's what I was told when researching motor mounts for the engine swap... I was told that I could use the block side mounts from a 3rd Gen F-body. That's what these are supposed to be. A buddy who had one sent these to me.

What I'm thinking here is that I've got the mounts on the wrong side of the engine. I'm betting that if I swap sides, the mounts will line up perfect, you folks think I'm right?

[LWillmann]

I pulled the engine back out last night, and can't find any real difference between the two, although the dealer says that there is usually a difference from left to right.

So, I'm not sure where to go from here. Not sure if I'm using the right block side engine mounts now. I guess I need to do some research.

[megaladon6]

it looks like you have them right. they're just a f%^kin PITA! i fought with mine for awhile before they went.

[Vegas69]

Shimming the stands or mounts and loosening the stands may do the trick depending how far off you are.

[novaderrik]

there is no left/right on the small block clamshell style mounts- and they even used the exact same mounts in everything with a small block or big block (except Vettes and Monzas) from 73 until they finally got rid of the last of the old school small blocks in vans in 2001 or so.
the only difference i know of is that some vehicles had a captured nut on the driver's side engine mount so you don't need to remove the mechanical fuel pump to easily get at the nut on the mount thru bolt.
usually if the holes don't line up right away, just jacking up on the tailshaft of the trans and wiggling things around gets things to fall together.

[LWillmann]

Well, I have verified that the driver's side mount is in fact wrong...

After talking to some people over on another site, who told me that the 334971 mount (the one on the passenger side) worked for them to drop right in to their car (his came from an 87 Monte SS), I called a place and ordered up a set from a car and had them shipped in.

When they came in, I pulled the mount on the driver's side of my engine (different number than 334971) and compared it to the 334971 and here is what I saw...

334971 is the mount on the right in the pic below:


There is an obvious space difference between the face that bolts to the block (against my knee) and where the through bolt goes through betwee the two mounts. I believe that the mount on the left is a truck mount, but can't confirm it. I'm sure there are other differences, but that's the most obvious.

At this point it doesn't matter, since I have the right mounts, I can clean them up, paint them and get the engine/trans in the car and get back to work getting the car on the road.

Oh yeah, and I've been working on the engine bay a bit too:




That one primer spot by the mount on the right is covered now. This is after the first coat of black. I've got to put the 2nd coat on, and and I can proceed forward with engine/trans install.

[TPI Monte SS]

Glad to see you have it worked out! Be sure to post pics of the new motor resting in its home once it's installed.

[megaladon6]

well that explains the problems i had i have the same mounts from my brothers truck.