Thread: td5 disco2 engine harshness

Originally Posted by justinc

I just replaced the drivers side engine mont on a D2 that had dropped enough to cause a significant drone when accelerating in all gears(auto) and was quite harsh at idle. The trick with these mountings is to look up from underneath at the hole in the bottom of the mount . If you can see rubber pushed up hard against the hole, then the mount has collapsed. The new one I fitted is about 10 to 12 mm further up inside.
Now a smooth vehicle again!

JC

I tried to check for differences between my left and right mounts a while ago but couldn't detect anything. I'll have to look for that hole. Thanks.

I've just found that the rubber is about 1-2mm above the metal base, so whilst it appears not to be touching at idle (mine doesn't seem to have a harshness at idle), I expect they touch at higher revs and/or engine torque. I can see a mark on the left rubber where it obviously touches sometimes.

I found that the rubber can be pushed upwards with minimal pressure, as though its only the rubber deforming rather than pushing against any air or liquid pressure. Is this also indicative of a failed mount?

justin, my right hand mount has collapsed and has a bit of wetness under it now too. do u know what a general garage might charge to supply and fit a new one? my car is under 3month warranty still. will this be covered?

Originally Posted by Graeme

I've just found that the rubber is about 1-2mm above the metal base, so whilst it appears not to be touching at idle (mine doesn't seem to have a harshness at idle), I expect they touch at higher revs and/or engine torque. I can see a mark on the left rubber where it obviously touches sometimes.

I found that the rubber can be pushed upwards with minimal pressure, as though its only the rubber deforming rather than pushing against any air or liquid pressure. Is this also indicative of a failed mount?

Hi Graeme, As far as I can see, it is only 'air' in there. The new one was quite easy to push up too. BUT, the tell tale is the aluminium top mounting to engine bracket, if it is hard up against the rubber surround of the engine mount itself, or has marks where it has been hitting/ rubbing, then the mount is close to, or has, failed.

JC

Originally Posted by simonr23

justin, my right hand mount has collapsed and has a bit of wetness under it now too. do u know what a general garage might charge to supply and fit a new one? my car is under 3month warranty still. will this be covered?

Hi Simon, I have PM'd you too.

Yes, the mount will need replacing if it is touching, or shows signs of touching the ally bracket above it.
The fluid could actually be coolant, from the fuel cooler which on earlier Td5's is directly above it...

JC

I am going to climb under mine this Sunday and check the mounts. I have a simular problem that has developed of late. Thanks for posting such a good tip Justin.

Still thinking about a trip up this way?

BradM

Originally Posted by justinc

Hi Graeme, As far as I can see, it is only 'air' in there. The new one was quite easy to push up too. BUT, the tell tale is the aluminium top mounting to engine bracket, if it is hard up against the rubber surround of the engine mount itself, or has marks where it has been hitting/ rubbing, then the mount is close to, or has, failed.

JC

My RH mount is showing a darkened contact area all around the centre, although with the engine not running the bracket is clear of the rubber by about 5mm. A new mount has been ordered and I'll be very pleased if this fixes the drone.
Thanks JC.

[QUOTE=BradM;717594]I am going to climb under mine this Sunday and check the mounts. I have a simular problem that has developed of late. Thanks for posting such a good tip Justin.

Still thinking about a trip up this way?


Sorry, Trip to the Kimberleys is off ATM, due to reduced time available to go away.

We're going for a quick trip to visit SIL at Thorntons beach, FNQ.

Soon though Brad, soon...

JC