Got the motor mounts installed, took me three hours. I'm pretty happy with that, because I've heard numbers like 5-6 hours for the install. Again, it was pretty straightforward: unbolt old motor mounts, place jack under oil pan, lower front subframe (had to unbolt the upper control arms on both sides to get it to lower enough), take out old mounts and reverse process to put back together.
The whole reason I ordered this kit was because a couple months ago I saw a bunch of brown liquid sprayed all over the passenger side of the front subframe. I assumed the motor mount had broken, either before I bought it in May or at the road course event I did back in June (same thing happened to my CTS-V last year, and I upgraded to poly mounts then). Anyway, this is what it looked like:
The top part just flops back and forth, it's very broken.
I took the car out for a few mile test drive with a bunch of stop and go, and I absolutely love the new mounts. The car has a 427 LS3 with a pretty big cam and monster stage 4 clutch. The car used to shake a lot at idle (1000rpm), and it sometimes bucks while cruising at low speeds. Also, the clutch would sometimes shake the entire car while starting from a stop if I didn't have the RPMs high enough.
Now, the car doesn't shake side to side nearly as bad at idle, but I do feel more vibration. This isn't really bad, I actually like the feedback. While cruising if it bucks/hesitates I do hear more drivetrain noise, that is really the only complaint I have, which I'm sure I'll get used to in a week or two. While starting from a stop, the car actually behaves a LOT better, no more bucking and shaking the car. I assume all this was because the one motor mount was falling apart and the motor could shake all it wanted. Oh, and the shifter doesn't move around anymore, it's very planted and shifting feel is definitely improved (hoping I never miss another 2-3 shift again, haha).
Quote:
Originally Posted by 93gtpeater
What are your plans after the mounts?
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Eventually I want to go FI, but we'll see what happens. This winter I'm upgrading my dual 2.5" exhaust to a full 3" system with bi-mode mufflers that are either quiet or straight pipes. Sort of like an exhaust cutout inside the muffler from the factory.