BenzWorld Junior Member
Date registered: Apr 2019
Vehicle: 1988 560SEL
Location: Sydney Australia
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Thanks guys for your reply.
From what I have seen, there appears to be no problem with the chain, guides and tensioner. Correct me if I'm wrong. I guess the guides and tensioner may fail anytime because of their age. This is always a gamble when it is not known when and if they were replaced. The same applies to the cam oilers. They appear to be firmly seated. I could not dislodge them by hand. And of course the valve stem seals need to be replaced. But my mechanic says there is no guarantee that replacing the seals will completely stop the smoking. It will depend on how much the stems and guides are worn. He quoted me AU$ 2,090 for parts and labour doing the chain, tensioner, guides, oiler tubes and valve seals. I just paid AU$1,800 for the scheduled 100,000 km big service on my Subaru Forester XT which includes timing belt replacement. The price quoted for the work on the old Merc does not seem to be excessive in comparison.
"mcculsm" - did your seal replacement stop the smoking?
I'll be going over to Germany in a couple of weeks for a family re-union. Judging by Ebay pricing, Merc spares are a lot cheaper over there. I may just get all the bits I need while I'm over there.
The sudden stalling and recovery of the motor is still a mystery. Throttle linkage is fine. Cruise control is erratic and hence I don't use it. When I get a chance I'll pull out the control unit and re-flow the solder joints. But I don't think this is the cause of the stalling issue.