30 years ago, I bought a 67 Austin Healey Sprite blowing LOTS of smoke. Owner told me it had been diagnosed with a bad head gasket. I concurred and bought it. Replaced the head gasket (twice). Made no difference. Decided rings were bad. Rebuilt the engine (twice). Made no difference. My wife found me in a state of despair sitting beside the car with huge clouds of white smoke billowing out the back. She said, "Looks like it needs some kind of pollution control device." Those words spurred a new thought. I reached under the hood and pulled off the PCV hose. Problem solved immediately. It had been sucking oil directly into the intake manifold via a bad PCV valve.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13