Engine Mounts Need replacing?
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Instructor
Joined: Jul 2007
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Engine Mounts Need replacing?
Hi, I have a 1999 C4 with 117K miles. I am on my original Engine mounts. I have read that if one side of the muffer is lower than the other, it is time to replace the engine mounts.
The question I have is how much lower? I just measured mine and the driver side is 1/4 of inch lower. Does this mean I should replace my engine mounts?
I also have increased vibration at over 70mph. Could a failed engine mount cause this?
Thanks for the advise!
The question I have is how much lower? I just measured mine and the driver side is 1/4 of inch lower. Does this mean I should replace my engine mounts?
I also have increased vibration at over 70mph. Could a failed engine mount cause this?
Thanks for the advise!
Rennlist Member
Joined: Oct 2006
Posts: 9,674
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From: CT
I just replaced my 96K mile motor mounts yesterday from stock to RS. The stock mounts had cracks in the rubber but was holding the motor well. It was a pain breaking the nut loose. Ferd and I with a 18 inch pipe extension on a breaker bar...
Nordschleife Master
Joined: Nov 2008
Posts: 5,815
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From: Mooresville, IN (Life Long Cheesehead)
Dang......mine came right off. How do you like the ride now?
To the OP.......not sure if the vibration over 70 is a mount though. Might be a tire balance issue.
To the OP.......not sure if the vibration over 70 is a mount though. Might be a tire balance issue.
Three Wheelin'
Joined: Nov 2002
Posts: 1,421
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From: north vancouver
One muffler sitting lower could be a motor mount, or it could be just that the tips are misaligned.
I've seen it both ways with two buddies each with one tip lower than the other. In one case it was a bad mount, In the other case it was a misalignment.
Crawl underneath and you'll see that the tips are clamped on with a spherical joint.
At 117K miles your mounts could be getting a bit tired. Stock mounts are cheap enough. It certainly can't hurt to replace them and the response to changes in throttle position will feel much better.
I've seen it both ways with two buddies each with one tip lower than the other. In one case it was a bad mount, In the other case it was a misalignment.
Crawl underneath and you'll see that the tips are clamped on with a spherical joint.
At 117K miles your mounts could be getting a bit tired. Stock mounts are cheap enough. It certainly can't hurt to replace them and the response to changes in throttle position will feel much better.
Rennlist Member
Joined: Oct 2006
Posts: 9,674
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From: CT
I only spent about 45 miles driving with the RS mount. I noticed it is a 964 part number. Broke a 9" extension socket trying to get the second stock mount loose. Shifting is more precise and the car feels edgier. I am running full stiff on PSS9s though. I got sick of getting the bobble from the front going up hill on full throttle when it was on 4/5.
Other work done was 2nd gear detent from GBox, oil change and steering wheel replacement. Ferd performed magic taking the detent out as it was still vacuum packed with tranny oil and would not come out with a magnet.
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Nordschleife Master
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From: Mooresville, IN (Life Long Cheesehead)
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Nordschleife Master
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Yes 3/8.... I'm not up there yet with the 1/2 inventory.... Only socket/wrench I have with 1/2 is for the lug nuts to torque it.... It's those Chicago cars that are a b*tch to work on.... When I start mess in with the bigger stuff, I may be forced to pull the trigger.
Parts Specialist
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Ferd, the bigger stuff makes it easy for "old men" to loosen ALL bolts... I am getting old and see my 1/2" drive stuff getting used more frequently, I seem to get less worn out, tired, sore. Money well spent...
Nordschleife Master
Joined: Nov 2008
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From: Mooresville, IN (Life Long Cheesehead)
This is off the Carnewal site. I assumed the P93 is the 993.
"Rennsport Motor Mounts for P96/P97
These are the motor mounts from the P93 Rennsport version combined with the correct hardware so these motor mounts can be installed in any P96. They replace the original motor mounts without any further modification.
Due to the reduced amount of rubber in the motor mount, they are an excellent upgrade for the standard or hard rubber motor mounts. With these motor mounts, the whole car will feel more solid and the shifting will be much more precise.
A must for cars with lowered suspension.
Price : 295 Euro. Dollar Conversion
Will fit every P96/P97."
"Rennsport Motor Mounts for P96/P97
These are the motor mounts from the P93 Rennsport version combined with the correct hardware so these motor mounts can be installed in any P96. They replace the original motor mounts without any further modification.
Due to the reduced amount of rubber in the motor mount, they are an excellent upgrade for the standard or hard rubber motor mounts. With these motor mounts, the whole car will feel more solid and the shifting will be much more precise.
A must for cars with lowered suspension.
Price : 295 Euro. Dollar Conversion
Will fit every P96/P97."
Nordschleife Master
Joined: Nov 2008
Posts: 5,815
Likes: 59
From: Mooresville, IN (Life Long Cheesehead)
Actually I think they are for a 964 and 993.
This is off the Carnewal site. I assumed the P93 is the 993.
"Rennsport Motor Mounts for P96/P97
These are the motor mounts from the P93 Rennsport version combined with the correct hardware so these motor mounts can be installed in any P96. They replace the original motor mounts without any further modification.
Due to the reduced amount of rubber in the motor mount, they are an excellent upgrade for the standard or hard rubber motor mounts. With these motor mounts, the whole car will feel more solid and the shifting will be much more precise.
A must for cars with lowered suspension.
Price : 295 Euro. Dollar Conversion
Will fit every P96/P97."
"Rennsport Motor Mounts for P96/P97
These are the motor mounts from the P93 Rennsport version combined with the correct hardware so these motor mounts can be installed in any P96. They replace the original motor mounts without any further modification.
Due to the reduced amount of rubber in the motor mount, they are an excellent upgrade for the standard or hard rubber motor mounts. With these motor mounts, the whole car will feel more solid and the shifting will be much more precise.
A must for cars with lowered suspension.
Price : 295 Euro. Dollar Conversion
Will fit every P96/P97."
Rennlist Member
Joined: Oct 2006
Posts: 9,674
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From: CT
Will bring assorted sizes of 1/2" extensions when we drop the engine this summer.
