1991 Mercedes-Benz 560SEC Q&A
1991 Mercedes-Benz 560SEC Question: smoke
Valve stem seals are a common problem. They can be replaced without removing the head but requires some special tools to do the job. - Visitor
Suggest also remove valve covers and check cam oiling system. - kuvaszok
...sudden started smoking. Looks blue to me but could be lighter color. Any ideas why it didn't smoke before or what could have caused it to start smoking now or what to do to fix it? Drove the c...