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Old 08-03-2010, 03:54 AM
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Answer

Quote:
Originally Posted by 777funk View Post
I just picked up my first W126 for $250. It was purchased "as is" because it wouldn't shift past 1st gear. Unplugged the kick-down switch and that was fixed. then a few other issues (no alternator, etc).

But now that that's all working I finally got it home (1 hour plus drive). Anyways, I noticed the dash gauge says ZERO on the oil pressure at idle and only 2 at 3-4k cruising speeds. So... that's not good. The car was run on SVO (stock fuel system). Anyways, where do I start. My guess is to second opinion the oil pressure (i.e. make sure the gauge is telling me the truth). But not too sure how to go about that.

thanks for any ideas.
I assume the 300SD is 1981-1985 OM617...

If that is correct, your starting point is the two small O-rings on the oil filter cover dip tube.

This is a common issue overlooked during oil changes...

When the two small O-rings become rock hard and/or break/crumble = the oil pressure reading drops/reads low.

Seal ring, x2
MB# 015 997 94 48

Fastlane: Oil Filter O-Ring
http://catalog.peachparts.com/item.wws?sku=W0133-1644350





Have a great day.
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Last edited by whunter; 06-06-2011 at 05:02 PM.
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