2004-2007 Cadillac CTS-V General Discussion Discussion, Vibration - too lazy for FAQ in Cadillac CTS-V Series Forum - 2004 - 2007; I bought my 80+ (now 90+) mile '04 in July. At the time it had no mufflers, just turndowns near ...
I bought my 80+ (now 90+) mile '04 in July. At the time it had no mufflers, just turndowns near the rear, and I drove that loud beast for some time that way. A while back I put stock mufflers on and have been driving it daily for the last several thousand miles (and who knows how many tanks of gas). Once it was quieted down I have become in tune with just about every noise and vibration noted on the forum. I have come to the conclusion that I can just drive it, enjoy it, and fix it when it breaks or I can become a hypersensitive, paranoid pantywaist. I live in Mississippi, there ain't much sympathy for a guy wearing panties down here.
I was worried for a while about having no warranty. Now I've come to the conclusion that I'm glad that if it breaks I just fix it myself without worrying with a dealer.
The more poly you add to the mounts/driveline the more vibration you are going to get. None of it really bothered my until I got the LS7 clutch kit in, but I think there is something wrong with my engine so it's going to the dealer tomorrow after I get a chance to datalog it first.
Now that was excellent information.
It sounds like some sort of engine vibration, the next step would be to remove the serpentine belt (don't run it for a long time) and see if the vibration goes away.
It could be accessory induced, so eliminating all the accessories would be the next step. From there if the vibration remains then it sounds like something connected to the flywheel. That could me a flywheel/pressure plate issue or possibly a balancer.
The best thing to do after that would be to put a vibration analyzer on it and punch in some data to find the frequency of the vibration and identify possible sources and then eliminate them.
The motor mounts might bring a bit more powertrain vibration into the cabin since they are not hydraulic like the stock ones.
Some might be considered normal, when your teeth start chipping that is a bad sign.
I am having this EXACT problem right now. engine vibration right around 2300 - 2500 RPM. Can you tell me if you ever determined what the problem was? We just replaced the water pump and replaced crankshaft balancer. THANKS!