Probably completely unrelated to your problem, but many M119 engines have problems with what people are calling cam oiler tubes. They are made of plastic and either break or fall off. You'll hear a clicking noise.

Do a search on oil tubes or oiler tubes. There's a ton of info in the archives.

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Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".