Possible to check the lower engine mounts via VIDA?

[A lex]

Im chasing a cabin vibration and gearbox clunk in my XC90 D5.

I have changed the gearbox torque mount, the upper mount, and the two small mounts on the end of the engine cross bar.

The good news is that the car now drives much, much better and shifts cleanly.

The bad news is that the cabin vibration at idle in D or P is now much, much worse - itll rattle your fillings out!

Im wondering if changing the uppermounts has shown up a fault in one of the other mounts that was previously being disguised by the 'sloppiness' in the rest of the system?

I have a fully working VIDA / DICE - is there anyway to cycle the operation of the vacuum mounts to check their operation?

Thanks!

[timh30]

Don't know about vida checking the mounts (would have to be monitoring loss of vacuum somewhere - which I doubt it can do directly). I think they do only operate below 1500rpm - so if you have a vacuum gauge you should be able to check the solenoid is operating. The other thing is to plug the feeds to the vacuum mounts and see if it gets any worse - it should if they are operating correctly.

I have changed both my front and rear vacuum mounts though, and changing the rear made a big difference (not so much the front one). The vibration was mainly felt through the steering column/wheel - as if I recall correctly the rear mount sits on the steering rack (or at least adjacent to it).

Edit - this is an old thread I posted on http://www.volvoforums.org.uk/showth...=140363&page=2

Probably worth getting a vacuum gauge - that way you can check if the mounts are holding vacuum and that the solenoid is operating correctly - i.e. allowing vacuum below 1500rpm, but no vacuum above that.

[A lex]

Originally Posted by timh30

Don't know about vida checking the mounts (would have to be monitoring loss of vacuum somewhere - which I doubt it can do directly). I think they do only operate below 1500rpm - so if you have a vacuum gauge you should be able to check the solenoid is operating. The other thing is to plug the feeds to the vacuum mounts and see if it gets any worse - it should if they are operating correctly.

I have changed both my front and rear vacuum mounts though, and changing the rear made a big difference (not so much the front one). The vibration was mainly felt through the steering column/wheel - as if I recall correctly the rear mount sits on the steering rack (or at least adjacent to it).

Edit - this is an old thread I posted on http://www.volvoforums.org.uk/showth...=140363&page=2

Probably worth getting a vacuum gauge - that way you can check if the mounts are holding vacuum and that the solenoid is operating correctly - i.e. allowing vacuum below 1500rpm, but no vacuum above that.

thanks

any recommendation for a particular vac gauge (from ebay or amazon)?

[timh30]

If you don't mind sucking on a pipe (using the t-piece) then you could just use one of these types - which is what I have http://www.amazon.co.uk/Draper-59075...s=vacuum+gauge

Others use a 'mityvac' which has a hand trigger to generate the vacuum - but they are more expensive (around £50 for model with pressure gauge) - but can also be used for brake bleeding etc.

Tim.

[JohnL]

I had a sudden bad vibration at idle and a with an aux belt squeak, its the overrun clutch on the alternator, worth checking out.
Run the engine with the aux belt off should confirm it.
John