typical 450 V8 engine failures???

[mike_1972]

Hi there,
I have read that there are supposently certain plastic parts in the 4.5ltr V8 engines (i.e. 450 SLC) that are prone to fail due to age.... something in the chain drive train.. is that correct...
What are those??

[8D]

[guydewdney]

cam chain guides...



parts 47 41 95 68 98 59....

guy

[GermanStar]

I believe that you're referring to the chain guides. The originals were aluminum/rubber, but the replacements are plastic. They can become brittle and shatter with age if they've been subjected to enough contact with the chain. The results can be disastrous.

[w108]

What years did the implement the plastic onto the 4,520 cc engine?

Tory

[GermanStar]

I could be wrong, but I don't believe that the plastic rails were ever used as original equipment. They were simply released by Mercedes as a modification.