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1982 Mercedes 300CD blow by

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Uploaded by on Mar 8, 2007

This is my Mercedes running with a warm engine. Apparently I have some blow by... not totally unexpected after 220,000 miles.

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Autos & Vehicles

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  • likes, 8 dislikes

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Uploader Comments (derherr65)

  • can i use this test on a truck also its cause i want to buy a chevy 2500 hd diesel but i dont really know how to check on diesel engine :/

  • @mnm9194 Sure, the problem is you'd have to know what normal was. Some amount of blow by is normal, and that will go up with mileage. A more accurate and reliable way would be compression testing.

  • @derherr65 and how is that test ..the one where I have to put a hose in through the water deal and check the psi?

    

  • @mnm9194 I don't know the specifics of the chevy diesel. A compression tester and a good shop manual are required.

Top Comments

  • blow by is irrelevant. Dont waste your time stressing out over it. if the engine runs, keep driving.

  • Not bad after 220000 miles!

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All Comments (18)

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  • The Mazda 3 that I drive always had blow by since I had it. My brother had bought it brand new. I've read that 99% of four cylinder engines have blow by because they're overworked. Well, my engine doesn't burn any oil, but I think that it vibrates more than it should.

  • having the rings changed wouldn't cost so much would it?

  • maybe some new rings?

  • this is minor blow by....

  • drive it till it blows.

  • Yeah Derjew is right, this worry over blow by is such shite, as long as you cold start and oil consumption is not excessive etc etc.

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