Intermittent Knocking Noise
After the GM dealer stuck in a new tensioner pulley in my '93 SSE */C, I started getting kind of a hollow sounding knock at times when shifting into gear, accerlerating from a stop & when hitting bumps. The noise is coming from the back of the engine, underneath & to the mid right.
I took it back & they diagnosed it as a broken left front lower motor mount that was causing the RF motor mount to jump excessively. Replaced the broken mount & still had the knocking as before.
Took it back again, they checked for anything loose, & came up with with a bad RF endlink. I'd actually already had the LF endlink replaced with a K5255 (Moog) at Firestone after it had broke when banking on a right turn after the pulley work at the GM dealer, so I took it back to Firestone & had them replace the RF endlink with the same.
But I still have the knocking sound as before, except it now doesn't seem quite as loud & frequent - it'* mostly now when shifting into forward 1st thing in the morning & when hitting a series of bumps.
I'm sure it was something the GM guy did when he changed out the pulley. Afraid he somehow broke that mount & that damaged something else, &/or did something to the stabilizer bar. Is that possible for that job? Any ideas?
Last edited by boa12; 04-07-2009 at 09:16 PM.