What is Main Role of each Engine Mount in megane?

[LostLover]

Dear friends,

What is Main Role of each Mount?
And If any fail, What major event occurs?

1) Upper Right Engine Mount
2) Top Engine Mount
3) Rear Gearbox Engine Mount
4) Gearbox Mount

Thanks.

[grandadbobby]

Hi,
ln my experience,any engine mount gone will either produce engine rocking with gearstick movement on taking up drive, or heavy drone sound throughout the whole car.
Bob.

[LostLover]

Hi,
ln my experience,any engine mount gone will either produce engine rocking with gearstick movement on taking up drive, or heavy drone sound throughout the whole car.
Bob.

Dear Bob,

As you know I have vibration on steering wheel on my car.
What do you think about that?
Do you think this vibration is related to which mount?

Thanks for your information.

[grandadbobby]

Hi,
l don't have a definite answer to your problem, it's an awkward one and obviously l can't hear it or feel it as you do.
l would, however, do a couple of tests before buying stuff which may not fix it.
Did you do the listening tests already mentioned in the previous post using a pole and running without aux belt ?
To test the upper drivers side mount, l would support the engine on a trolley jack using a rubber mat or soft block of wood. Take the mount off and see if vibration is gone, while the mount is off you can see condition of it also.
On my car l noticed the silver air con pipe almost touches part of the mount, l suspect, you've already checked that but feel the pipe for the vibration.
Remember that any vibration will be accentuated up the column.
l realise that you may not be in a position to do these tests yourself, if that is the case, ask around to find a small friendly garage. l wouldn't buy mounts just in the hope of a fix, the cause needs to be found.
Good luck
Bob.

[LostLover]

Hi,
l don't have a definite answer to your problem, it's an awkward one and obviously l can't hear it or feel it as you do.
l would, however, do a couple of tests before buying stuff which may not fix it.
Did you do the listening tests already mentioned in the previous post using a pole and running without aux belt ?
To test the upper drivers side mount, l would support the engine on a trolley jack using a rubber mat or soft block of wood. Take the mount off and see if vibration is gone, while the mount is off you can see condition of it also.
On my car l noticed the silver air con pipe almost touches part of the mount, l suspect, you've already checked that but feel the pipe for the vibration.
Remember that any vibration will be accentuated up the column.
l realise that you may not be in a position to do these tests yourself, if that is the case, ask around to find a small friendly garage. l wouldn't buy mounts just in the hope of a fix, the cause needs to be found.
Good luck
Bob.

Dear Bob,
Thanks for your good information.

I have check belt tension and other pulley about noise sound,
and there was not any noise sound in these parts.

And I have request from a mechanic to check other parts and He checked them...
for example he test upper engine mount and gearbox mount and crankshaft pulley,...
and they were healthy in appearance...
But he did not open these parts, And he only judge of the appearance of parts...

If engine is on, but no moving, in (N) or (P) situation, inside of car (body) have low vibration,
but steering wheel have not any vibration,
when moving (situation D),
there is low vibration in body and steering wheel.
the vibration is not continuous and change in depend of speed and Gas clutch...

when I moving highly in traffic with low speed (about 30 or 20 km/h) and engine is warmer,
after release the gas clutch, without any more speed, and without brake clutch,
the vibration on steering wheel will be higher and Touching it by hands is very more...

The problem about your test is this vibration is when car moving...
and when car not moving, there is not vibration to test of that...

[grandadbobby]

That does sound like the rear g/box mount to me.
That should be easy to check for a garage.
lf it's not that, l think maybe the flywheel/autobox would be suspect.
Fingers crossed.
Bob.