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Hello All and happy New Year
I have a 99 vert that seems to have an oily film on the driver side motor mount..I cannot figure out where this oil is coming from..it has been there for quite sometime..like I stated.. it is just an oily film and never drips on floor.I have looked everywhere and cannot locate any leaks in the surrounding area..any help would be greatly appreciated.
I found that by accident, was chasing a vibration issue with a new motor. Took a break, put a hand on top of the motor and leaned into it just to rest and saw how far it moved. The mount on the drivers side had essentially collapsed, no fluid in it.
Sorry about the link. Photobucket vids don't seem to autoplay or link right here anymore.
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Originally Posted by fasttoney
maybe the hydraulic fluid in the mount is leaking out?
OP: The fluid is there for NVH suppression and it does not support the weight of the engine. Messy when it leaks...... Replace them both would be my advice.
Btw, when removing/lowering the front cradle to gain access to the engine mounts, do NOT use any power tools (don't care if they be air, electric or steam powered) to either remove OR install the four large mounting nuts. Hand tools ONLY on those puppies.
Shouldn't need to drop the cradle. Support the motor from the bottom, take the bolts out, lift the motor up about 1 to 2 inches. There's room. And I speak that from experience. I changed the motor mounts on my car in an afternoon this way, and that's WITH the turbo's and manifolds hanging in place still (down low on each side of the oil pan).
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Originally Posted by Fastbird
Shouldn't need to drop the cradle. Support the motor from the bottom, take the bolts out, lift the motor up about 1 to 2 inches. There's room. And I speak that from experience. I changed the motor mounts on my car in an afternoon this way, and that's WITH the turbo's and manifolds hanging in place still (down low on each side of the oil pan).
Shouldn't need to drop the cradle. Support the motor from the bottom, take the bolts out, lift the motor up about 1 to 2 inches. There's room. And I speak that from experience. I changed the motor mounts on my car in an afternoon this way, and that's WITH the turbo's and manifolds hanging in place still (down low on each side of the oil pan).
100% AGREE.. We had the cradle out to replace the conrod bearings and when the friggen entire cradle was back in and the engine running, my buddy powerbraked the car and the entire engine lifted up on the drivers side!
NOT wanting to remove the cradle AGAIN, we just jacked up the engine (one side at a time ) and replaced BOTH with new OEM Mounts.
They sell poly mounts but, most of them are EXPENSIVE!
Bill
Last edited by Bill Curlee; Jan 2, 2016 at 03:01 PM.
The Pfadt mounts is where it was at IMO. Borderline a solid mount with just enough poly to keep vibrations down. OUTSTANDING clearance as it's got a much smaller footprint. I think AFE sells their stuff now but man, they got pricey.
From: Birmingham, AL www.hinsonsupercars.com 205-909-9402
Pick up a set of our performance urethane mounts. They are stainless steel interlocking design that is anchored in our blended urethane. The result is a mount that performs like a solid, but dampens like a stock mount. Best of all worlds.
FYI our mounts do not require heat shields unless you are running road race sessions, or have tight clearances for something like a turbo car. If this is your case, we do offer heat shields. Again NOT REQUIRED FOR STREET CAR USE!
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
The Hinson mounts are very well made and a good design, but after experiencing driver's side heat deformation from my 1 7/8" Kooks headers on my street driven NA car, I was left with little choice but to install heat shields.
Even with stock rubber mounts, GM saw fit to install OE motor mount heat shield on a number of C5s and C6s. Heat protection for motor mounts is not a big issue or expense.
Motor mount issue
Replace them both would be my advice. 
