motor mounts lifespan?
 

Well now that I am in the middle of replacing valve stem seals and have one of the heads out on a 83 380SL, Is there a benefit in replacing the right side motor mount, or it's just not required? Thanks for your opinions.

If they are original they are shot.

Engine Mounts
 

1984 300d Turbo 137 K
Replace 2 Each Engine Mounts, Oil Is Not Good For Engine Mounts And The Valve Stem Seals, **************.com Have The Kit 10 Seals, Guide Book, Tool To Push On Seals, And Extra Valve Lock Nuts, $75.00 3-6 Hrs, No More Smoke After Stop Light. Diy

2 years ago at 84K miles, my 560SL's driver's side mount was torn (broken) and the pass side was crushed >1/2" from its original height.

I guess i should go the extra mile and replace them while I am at it.
:eek:

if you have the heads out why aren't you having the valve guides replaced? Stem seals are just band aids on higher mileage motors.
Motor mounts should Always be replaced in pairs..if one has failed the other is soon to follow.
Stick w/ the genuine mounts, or lemforder if you want to save a couple of $$.

Jonathan