1980 MERCEDES BENZ 300SD OIL COMING THROUGH VALVE COVER TUB

  • Tiny
  • ckumelos
  • 1980 Mercedes Benz 300sd

Engine Mechanical problem
1980 Mercedes Benz 300sd 6 cyl Two Wheel Drive Automatic 155000 miles

This is actually a 300D, not an sd (I think).I guess the subject about sums it up. What would cause oil to come up through valve cover tube and how do we fix it?

Thanks,
Celeste Kumelos

Monday, October 6th, 2008 AT 1:52 PM

3 Answers

  • Tiny
  • KHLow2008
  • Expert
  • 41,976 posts

Hi ckumelos,

Thank you for the donation.

When engine blowby pressure is high, oil would be pushed out together with the ventilation gases.

The main cause would be worn piston rings and a clogged PCV.

To rectify the problem an engine rebuilt is required.

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Tuesday, October 7th, 2008 AT 1:41 PM
  • Tiny
  • ckumelos
  • Member

Well, crap. Not worth the effort. I appreciate the help.

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Tuesday, October 7th, 2008 AT 2:03 PM
  • Tiny
  • KHLow2008
  • Expert
  • 41,976 posts

You are welcomed.

Merc tends to have this problem for their older models.

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Tuesday, October 7th, 2008 AT 2:14 PM

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