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06-21-2011
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#1 |
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Join Date: Mar 2009
Location: Orlando, FL
Posts: 1,816
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How-to Swap the Motor Mounts?
I have been wondering if the lack of clearance between the #1 header tube and the steering shaft is due to sagging mounts, being that my car has a lot of miles on it.
I should have changed the mounts when the headers were off, but I didn't -- so now I'm left with wondering if I'm going to need to pull the headers off in order to change out the mounts or not. Does anyone know if it's doable with the headers (Jeal) in place? Edit: It's not doable. Pulling the headers is really not that bad of a job, and it gave the access needed to do this job properly. See later in thread for pics of mounts and more commentary. Last edited by ZBrink; 01-26-2025 at 01:14 AM. Reason: edited for clarity |
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06-21-2011
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#2 |
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Join Date: Mar 2009
Location: Orlando, FL
Posts: 1,816
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Re: Motor mount swap questions
Yeah, I just looked at the driver's side, might be doable. Can't tell on the passenger side just from looking from above. Might take some creative use of extensions and wrenches.
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06-22-2011
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#3 |
 
Join Date: Dec 2003
Location: Arcadia, OK
Posts: 3,403
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Re: Motor mount swap questions
Don't forget the C-beam is attached, making the whole driveline one rigid unit. Jacking up the engine with the c-beam still secured could damage the c-beam or trans. When I tried jacking the engine with all attached, it acted like the motor mounts were still bolted to the frame. I suggest removing the c-beam before trying to jack the engine up. Does the service manual mention anything about that?
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Jerry Downey JERRYS LT5 GASKETS & PARTS http://www.jerrysgaskets.com 1994 ZR-1, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc. 2016 Black-Red, 3LT-Z51 Auto 8-speed. |
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06-22-2011
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#4 |
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Join Date: Mar 2009
Location: Orlando, FL
Posts: 1,816
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Re: Motor mount swap questions
Yep, I figured the c-beam would have to come off the trans... thanks Jerry!
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06-23-2011
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#5 |
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Join Date: Mar 2009
Location: Orlando, FL
Posts: 1,816
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Re: Motor mount swap questions
I pulled the headers off today, and removed the motor mounts. Here's what the original 20 year old mounts look like, next to the aftermarket new mounts:
 As you can see, the mount is cleanly cracked right through the rubber.  You may also notice that the aftermarket mount is a few mm taller than the OEM mount, which in my case may be helpful, to help with header clearance near the steering shaft. The OEM mounts are made in Japan, the aftermarket mounts are made in India. Quality seems OK, but on the mount I used for the passenger side, a little massaging with Mr. Angle Grinder was necessary for proper fit. The tube which slides into the bracket on the block, was a few mm too long, requiring some trimming. |
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06-23-2011
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#6 |
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Join Date: Mar 2009
Location: Orlando, FL
Posts: 1,816
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Re: Motor mount swap questions
Couple of pics of the motor mount area, without mount, for reference purposes:
 With new mount installed: 
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06-24-2011
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#7 | |
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Join Date: Mar 2009
Location: Orlando, FL
Posts: 1,816
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Re: Engine mount source
Quote:
Good to know -- looks like the same part as the Anchor unit, but who knows. |
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06-28-2011
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#8 |
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Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,843
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Re: Motor mount swap questions
Andrew,
Now that the mounts are in have you noticed any less engine/drive train noise inside the car? I've beed wanting to do this for a while on mine as I get an unusual amount of drivetrain noise inside the car. I'm thinking the mounts are collapsed and there is metal to metal contact somewhere. Did the header to steering shaft clearance get any better? H |
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06-28-2011
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#9 | |
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Join Date: Mar 2009
Location: Orlando, FL
Posts: 1,816
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Re: Motor mount swap questions
Quote:
Andrew |
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06-28-2011
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#10 |
  
Join Date: May 2007
Location: Peoria, AZ
Posts: 9,119
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Re: Motor mount swap questions
Andrew thanks for the tip. I ordered a couple of mounts from Rockauto. I figured while the block is being pulled what the hell. Daryll
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