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Q: smoke on 1991 Mercedes-Benz 560SEC

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
1989 560 my engine will smoke (blue) at high speed ,but vewry little at idle
Valve stem seals are a common problem. They can be replaced without removing the head but requires some special tools to do the job.
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