I suspect that the vibration and the noise stem from work done and I would point to the idler/tensioner pulley. It could be that they did not tighten it enough. You made the comment that the noise lessened the second time around. Generally, the manufacturer will give a range of which the tension is acceptable. Some places try to stay on the lesser side of the specs and you might want to reach for the higher end. I doubt at the age of the engine but yet another possibility is that the tensioner itself could be in need of replacement.

Hope it helps.

Answered by Bruce Hunt (expert)
3,803 answers provided

2001 Hyundai Sonata 81K 4CYL--

I have this vibration too. Last week I had the timing belt changed. Now i have a very noticable vibration, especially around 2800-3200 RPM. My mechanic has said it is the motor mounts being out of "original" location. He has tried to "adjust" them once. There was a slight difference, but there is still a vibration that was not there before i took the car in. My timing belt was not broken when I had it changed.

Is there a balancing or harmonics that need to be adjusted? I did not take it to the dealer as they wanted 3 times as much to work on it. But my mechanic is well known in the area and came recommended.

Any thoughts?

David

Answered by deesully
0 questions asked

There is quite a trail of things to do in the installation. A major focus is on the tensioner and getting that set right.

Answered by Bruce Hunt (expert)
3,803 answers provided