My 1979 300SD (125K miles - all original) has developed an engine knock. It sounds like a valve adjuster has come loose. On inspection, the valves are all ok, but found the cam had worn a little on the front 3 lobes. Replaced the cam, but still making the noise. Other than the noise, the engine runs fine, no loss of power, no oil consumption. Any suggestions?
Diesels were only sold in the USA and so your question may not get much help from the international members of this forum. If you don't get much help soon, you may be better posting your question on one of the general MB forums, such as //www.Mercedesshop.com which has a whole section dedicated to diesels.