Question about 1992 Mercedes-Benz 190

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Pump Priming Problems.

1992 mercedes 190E can't prime the oil pump. Put new housing and oil pump gear and primed it but the pressure hasn't come up yet. any sugestions?

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  • ljohn1961 May 21, 2008

    according the the haynes book the pump isn't self priming , the pump has to have oil put in the pump to start the prime sequence. A vacuum pump doen't drive the pump on this model,

    the crankshalf does.

  • ljohn1961 May 21, 2008

    this mercedes ls a gasolene engine not desel

    does the way the gears in the pump has to be in a certion way? I need some expert advice , step by step.

  • ljohn1961 May 23, 2008

    I will buy some and try it
    and let you know the out come.

    thanks.

    ljohn1961

  • ljohn1961 May 23, 2008

    The suction filter is clean as a whisle.
    I think I need to get the air pocket out of thesuction filter.

  • Anonymous Mar 15, 2014

    My 2008 touareg has sat for a year. i wanted wondered what i need to do before starting it again

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  • 3,037 Answers

You should try to pack the gears and pump cavity with petroleum jelly which will prime the pump and the oil will then displace the jelly. If you use any other kind of grease, the oil will not be able to displace it so make sure you only use petroleum jelly. This is the stuff used in the medical field but works great for this purpose too. Let me know how it goes and whether you have any further questions. Thanks and good luck

Posted on May 22, 2008

  • Benjamin Patri
    Benjamin Patri May 23, 2008

    sounds good, will be waiting for the news

  • Benjamin Patri
    Benjamin Patri May 27, 2008

    Were you able to fix this, if so then please give me some feedback by
    rating my solution. If you need any more help, I would be glad to
    assist you, just ask.

    thanks and Have a Great Day!

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  • Master
  • 1,665 Answers

Oil suction filter may be clogged. Did you check it?

Posted on May 21, 2008

  • Britt Griggs
    Britt Griggs Feb 17, 2014

    Put on a brand new one,

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1 Answer

What is meant by priming a new oil pump?


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it's not priming.
that grease trick helps.
is this some china pump off fleabay or a real jeep pump..???
did you do the below.:
1: the grease sure. and then prime the filter and the gallery behind the
filter.
2: With fuel and spark defeated, and spark plugs removed then with pressure gauge attached to sender port, did you crank it to get max pressure (my guess is this is the step you are posting on.)
i never start any engine, (after majors) unless i get #2 to work first the number 3, which is top end oil checks.

the pump is no priming.
In pro shops they make up a priming tool. so new engines are never
started, 1st time dry, ever.
one way is just a tank full of oil and shop air, and 2 valve.


maybe the new pumps relieve valve is stuck open, fully.
i rebuild my own classic engines, after all that work !!! i never
ever, skip these steps.
and for 100% sure, good pressure, and top end oiling on any major work.
one of the top brand pump makers. VIDEO
http://www.youtube.com/watch?v=tOYLlr8uQ8k
NEVER !

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