Vibration - Unknown source.

puggy · Post by **puggy** » Sun Jul 15, 2007 9:30 pm

Hi mick and welcome

was going to suggest the rear engine mount but you done that
but reading on here i believe all the mounts are suspect known to be weak

mbell666 · Post by **mbell666** » Mon Jul 16, 2007 8:51 am

Is it at certain speeds or at certain revs?

Post by **Welly** » Mon Jul 16, 2007 9:01 am

Well, I thought rear engine mount

My rear mount is shot and I will get vibration when the car crests a hill and goes light.

Other sources of vibration can be the Dual Mass Flywheel, if it gets worse it will eventually 'catch' on the bell housing as it rotates

the flywheel gets worn and goes out of balance. You can sometimes feel it on tickover, like it's miss-firing.

There are the obvious things like wheels (but I'm sure you've checked this).

A really big one is the differential bearings! this will show itself as heavy vibration but only under acceleration, it will cease as soon as you lift off. This problem is extremely rare though and will only normally happen at 250,000 miles ish.

Also have a read of this, it may help you viewtopic.php?t=2644&start=0&postdays=0 ... highlight=