05-18-2008, 08:38 PM
As some of you may be aware, I had an engine bay "rattle" develop after driving my 93 coupe (after the purchase) from North Carolina to Chicago. With 90K miles on the car, and the rattle sounding sort of like a loose timing chain, I decided to tackle an upper end inspection of the cam sprockets and replacement of the varicam chain and pads. This was a 12 hour job that took me close to 6 weeks to complete, since my wrenching time is very scarce these days! At any rate, the cam sprockets looked fine.....no broken teeth or teeth overly thinned out....so, I went ahead and changed out the cam chain and pads and "while I was in there", I also did a front end reseal and replaced all the rollers and belts.
She fired up on the first try, and other than a slight whine from a slightly too tight balance shaft belt, she seemed "better". I took her for a drive and the performance was good and unchanged, but when I returned to my garage.....there was the "rattle" again. No different or worse than when I decided to do the cam chain. Since it is almost impossible to tell where the rattle is coming from, I am going to pick up a stethoscope from Sears and give things a listen.
My question for the 968 Forum.....is where could the rattle be coming from if not from the cam chain? It kind of sounds as though it might be coming from the clutch area, but at this time, that is only a guess. Any ideas or direction that any of you can provide would be greatly appreciated.
What in the area around the clutch would cause a rattle? The noise is loud enough that you can just hear it when inside the car. It does not sound like lifter clatter. And, it is noticeable from standing in front of the car or to the side of the car. When I get the stethoscope, I plan on putting the car up in the air and probing different areas. I believe that the flywheel is original as is the pressure plate. The dealer indicated that he had just replaced the clutch disc and was reluctant to replace the entire clutch assembly.
What should I be looking for?
She fired up on the first try, and other than a slight whine from a slightly too tight balance shaft belt, she seemed "better". I took her for a drive and the performance was good and unchanged, but when I returned to my garage.....there was the "rattle" again. No different or worse than when I decided to do the cam chain. Since it is almost impossible to tell where the rattle is coming from, I am going to pick up a stethoscope from Sears and give things a listen.
My question for the 968 Forum.....is where could the rattle be coming from if not from the cam chain? It kind of sounds as though it might be coming from the clutch area, but at this time, that is only a guess. Any ideas or direction that any of you can provide would be greatly appreciated.
What in the area around the clutch would cause a rattle? The noise is loud enough that you can just hear it when inside the car. It does not sound like lifter clatter. And, it is noticeable from standing in front of the car or to the side of the car. When I get the stethoscope, I plan on putting the car up in the air and probing different areas. I believe that the flywheel is original as is the pressure plate. The dealer indicated that he had just replaced the clutch disc and was reluctant to replace the entire clutch assembly.
What should I be looking for?
