Engine Mounts

[Paddy_Crow]

So, do you think my mounts were bad? LOL, what you can't see in the pictures is that the new mount is almost an inch taller. You can see where the support arm was resting on the rubber.

[ja17]

Hello Paddy,

Look at the under side to see if the old mount colapased and was resting on the frame. You will see rub marks.  It looks like your old mount was failing.

[Paddy_Crow]

The mounts definitely collapsed and failed. The center metal piece is completely separated from the rubber. Interestingly, when I went to replace the trans mount it was almost new. I know the previous owner had some transmission work done, probably had it replaced at that time.

It made a huge difference, by the way. It used to shake quite severely in drive at idle. Smooth as a baby's behind now.

[KUMARB]

Was this the right engine mount which failed?

I had to replace a collapsed right engine mount on my 280SL. I think the right mount is more likely to fail than the left mount as the right mount carries more weight because of the added weight of the over-hanging intake/exhaust manifolds attached to the right side of cylinder head.
 
In my case, the right side of the engine had dropped down slightly making the exhaust manifold flange to touch the idler arm bracket. These two touching parts made metallic clanking noises with engine vibrations. Replacing the right mount corrected this problem.

Respecfully,

[waqas]

quote:Originally posted by KUMARB

Was this the right engine mount which failed?

I had to replace a collapsed right engine mount on my 280SL. I think the right mount is more likely to fail than the left mount as the right mount carries more weight because of the added weight of the over-hanging intake/exhaust manifolds attached to the right side of cylinder head.

The right engine mount is also under greater compression load due to the engine torque. I suspect this contributes more to mount failure than the added weight of the exhaust system (whose weight is actually distributed over three different points under the car)

[Paddy_Crow]

quote:Originally posted by KUMARB

Was this the right engine mount which failed?

I had to replace a collapsed right engine mount on my 280SL. I think the right mount is more likely to fail than the left mount as the right mount carries more weight because of the added weight of the over-hanging intake/exhaust manifolds attached to the right side of cylinder head.
 
In my case, the right side of the engine had dropped down slightly making the exhaust manifold flange to touch the idler arm bracket. These two touching parts made metallic clanking noises with engine vibrations. Replacing the right mount corrected this problem.

Respecfully,

Left and right were both collapsed. My trans mount, however, looked like it had recently been replaced so I didn't replace it. It made a huge difference, much less engine shake at idle.

[ja17]

Hello Waqas,

Actually the right side engine mount is compressed when  the engine is loaded, while the left side is actually "pulled" upward under engine load. You can watch the engine strain to one side when the accelerator is poked. This action is magnified many times under driving conditions.
The torque plates under the mounts limit this movement and keep the engine from pulling the motor mounts apart.