Avoid catastrophic engine failure by maintaining your timing chain. The plastic chain guides, sprockets, pins, tensioner and chain can all be renewed through…
MERCEDES BENZ TIMING CHAIN & GUIDE RAIL & TENSIONER REPLACEMENT
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Benz, Chain, guide, Mercedes, Rail, Replacement, Tensioner, Timing
- Categories: Mercedes-Benz
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Thanks for an excellent Video. I was looking for such a video for a long
time. One question. I have opened the same 450 slc engine and the chain is
extremely loose, there are teeth broken down on the right hand cam gear
wheel and score marks next to it. On inspection all the guide rails and
tensioner rail seem intact and my fear is there is a deeper guide rail
further down which I cannot see? I took the tensioner off and it seems ok
be it with a soft spring-back. How could I see if this is intact or if
there is any other damage as I could not find what caused the problem. I
realise the chain and cam gear at least should be changed, but how can I be
sure the cause of the problem has been fixed as I do not want to go into
the trouble of taking the front of the engine off. Would I need to take the
sump off and how would I remove the crankshaft pulley?
Nobody can diagnose over the internet, but you should read the excellent
write ups on chain issues at
http://www.benzworld.org/forums/r-c107-sl-slc-class/1556523-timing-chain-visual-inspection.html#post4455220
/ You are lucky with a loose chain, as a failure will total this
interference engine. Don’t drive it. Unfortunately you can’t get to the
lower guide rails or the the crank pulley without removing the engine from
the car. If I were you I would do the job in the video, replacing all the
uppers and sprockets and tensioner, then see how your timing marks line up.
If they are within a few degrees and the chain is tight, I would not worry
about the lowers. If not, then you have a decision to make on a
mechanically advanced lower chain service.
Fresh chain on a 100,000 mile 1980 MB 450SL doubles the life of this engine