I have a 1995 Hyundai Elantra (J1) and whenever I start the car up, a loud vibrating/rattling noise comes from somewhere in the engine bay. It doesn't sound as if anything is loose though. To narrow it down:
The noise is there only when the car has been standing for a while;
It only makes the noise between (roughly) 1500rpm and 3000rpm;
After the engine warms up, the noise disappears.
Any helpful suggestions/info would be highly appreciated!
Could be a valve lifter leakdown problem if its coming from the upper part of the engine
April, 20, 2012 AT 3:57 PM
It sounds as if its coming from where the pulleys are. The noise is now permanent.
Thanks a lot.
April, 21, 2012 AT 4:30 AM
Sounds like you need to open the front cover and investigate the T/Belt, Tensioner pulley, idler pulley, counter shafts
May, 8, 2012 AT 3:53 AM
I have managed to remove some parts around the noise and discovered that when I push the tensioner pulley down, the loud knocking noise disappears. Could it be that the auto tensioner pin knocking against the tensioner arm is causing this noise? I removed the tensioner pulley and noticed a gap between the auto tensioner pin and tensioner arm.