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Thread: Lost oil pressure

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    Lost oil pressure

    Got a 2009 GTI 2.0 TSI CCTA
    Lost oil pressure thought it was bearings so we had lower end rebuilt with bearings and rings. Has pressure until it warms up and drops to 0 psi after warm. Has updated tensioner on it. Car only has 100,000 miles on it. Could it be in the head, maybe crack?

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    Benevolent Dictator Uwe's Avatar
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    Moving to General VW/Audi Repair...

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    NostraJackAss Jack@European_Parts's Avatar
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    Was the oil pump and oil filter housing with PSI control changed when rebuilding the low end?
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    Tried 2 different (new)oil pumps and no the filter housing was not.
    We also took the oil pressure fitting off where its connected to motor and blew air threw it. You can hear alot of air blowing out somewhere in the head under the cover where the camshafts are. We have also tried new electronic gauge and tried a mechanical gauge also. We accidentally left the fitting out where the sending unit goes and started car and it shot oil about 5 feet across garage. Only ran for about 2 seconds like that. We have the front end off to get easy access to everything. So we know we are getting oil to the sending unit. But somewhere after that its not creating any back pressure to show oil pressure. My question is, what after that could it be? somewhere if head? could it be a cam tower worn out?
    Last edited by Cliff; 02-06-2017 at 10:31 PM.

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    Verified VCDS User NZDubNurd's Avatar
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    What oil grade are you running? What is the cold pressure at idle?


    Jack might know (by the sounds of his question), but is the pressure sensor BEFORE the high pressure releif valve?

    If it's stuck open, you won't get much oil pressure, especially as the oil thins out. It's part of the filter housing. If you had really thick oil (50W-70!!!) the releif valve is supposed to limit the max pressure by dumping the excess.

    It has to be a MIGHTY big leak for you to get "0" pressure - any kind of restrictive crack or orifice will cause at least some pressure, unless it opens up pretty wide, from a major artery.

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    Its my sons car. I believe he said 5w30. Pressure cold at idle is at about 40. Is the pressure relief valve something that can be clean or replaced? Is there any pictures of this relief valve?

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    There is not a pressure relief valve in the filter housing that we can find.

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    Verified VCDS User NZDubNurd's Avatar
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    Sorry - I don't know where it is on your motor - a workshop manual, or maybe Erwin???

    On previous models, like the 1.8T, it was in the side of the filter housing, and could get clogged up, or loose pressure holding ability sometimes. It just looked like a bolt head, but it hald in a plunger and a spring - much like the old airkewled ones had in the bottom of the case.

    I would suspect the pump has one, but that the filter housing likely has one too, to help revent black, grubby explosions when someone canes it, with thick, cold oil.

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    We have filter housing off. We have a manual and neither off the show a relief valve of any sort.

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    Talked to a VW repair shop today here in MPLS. He couldn't think of anything either. We talked about oil filters. Think maybe a after market filter could be the problem? Not a OEM filter?

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