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The W123 chassis covers 240D's, 300D's, 300TD's, 280E's, and several other models of Mercedes coupes, sedans and wagons from model years 1977 to 1985.

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How do I fix oil blowing from my air breather crank case

There is oil coming out of my air breather to my air filter on my 1980 Mercedes 230 excessively.What can be the cause

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Hi my ade366 has no smoke but it doesn't have power


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This is classic example of blow-by caused by failure of the valve seals and / or piston rings. Combustion gases leak past the sealing surfaces causing an increase in pressure within the crankcase. It is commonly due to higher-mileage engine with less than required maintenance history (lack of frequent oil changes). To check for excessive blow-by, remove oil filler cap, then idle warmed-up engine. If steady stream of smoke emits from oil filler opening, either or both of the items mentioned need attention. Compression test and leak-down test should both be performed to verify causes and components needing service. Depending on degree of failure, it is not unheard of to keep driving vehicle while being judicious about maintaining proper oil level and air filter cleanliness.

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