Just Replaced Timing Belt, Slight vibration at 800 RPM

**derek.straight** · 10-09-2008 01:39 PM

So I replaced my timing belt this last weekend, and now have a substantial vibration at idle. If I apply even the slightest amount of throttle to get to 1000 RPM the vibration immediately goes away. I ensured proper alignment of the belt by turning the crank 4 revolutions and the timing marks stayed aligned. Could this be a mis aligned snub mount? Has anyone else encountered this problem at very low RPM only? Thanks

**lookaught** · 10-09-2008 02:10 PM

it is the snub, my car did the same thing (well, still does actually, b/c I never fixed it b/c everytime its on the lift the engine is hot). Adjust the snub per the APR instructions when the engine is COLD and it should go away. Do you have an aftermarket snub?

**NyteEscape** · 10-09-2008 03:06 PM

i would have to agree about the snub. just let the car warm up and re-align in...

**widgget** · 10-09-2008 03:12 PM

snub first, second thing to check is the accessory belt, the bottom pulley didn't seat centered when i did my timing belt and put it all back, my accessory belt tensioner was "bouncing" (not off the belt or anything). pulled it all back apart and tried to center it, still bounces a little but it 5x better now.

**lookaught** · 10-10-2008 10:40 AM

Originally Posted by NyteEscape

i would have to agree about the snub. just let the car warm up and re-align in...

I adjusted mine when the engine was warm (and the mounts, etc) and while it's smooth once warmed up it vibrates like hell when the engine is cold. thats why I suggest to adjust it when cold.

Then again, if you do that it may vibrate once the engine is warm! I have not readjusted mine, so I can't say for sure.