Mercedes-Benz Forum banner

1 - 2 of 2 Posts

·
Registered
Mercedes-Benz 560SEL mod 91,MB 560SEL mod 90
Joined
·
500 Posts
Discussion Starter #1
Hi everybody,
I heard so often that some MB owners "560sel" get rid of the inner valve springs during the installation of new valve stem seals. Some seals have outside diameter larger than the original ones and when seals are installed, they get stock in the inner valve springs and because of this, they get rid of the inner springs. In my opinion, I totally disagree with this idea :mad: but I want to know what kind of effect would be caused to the engine if those springs were disregarded? Is there any harm to the engine? would this has to participate in engine compression, engine operating temp...etc. Thanks
 

·
Registered
Proud owner of an Blue-Black (Charcol Gray) '91 420SEL
Joined
·
704 Posts
In most engines this is to help with valve flutter at higher RPMs.
I am absolutely no expert on these engines but it may also have to do with the extremely close interaction of piston face at TDC and full valve deflection (travel).
Perhaps in these engines it is also for backup in case one fails but hopefully someone else will chime in too.
If the spring fails then this will be very expensive to fix.

jimm1009
 
1 - 2 of 2 Posts
Top