Low oil presure on a M42 318I engine

Asked by Oct 09, 2015 at 11:18 PM about the 1991 BMW 3 Series

Question type: Maintenance & Repair

I have been told there are 2 oil check valves on this engine.
1 on the canister oil filter
the 2nd under the intake manifold.
All specs out... have a pressure reading of 5 PSi S/B 25
Doesn't change when u rev the motor. Is there a check valve under the
manifold? Or any ideas what it might be.

1 Answer

25,665

On a '91 3 series it could be a bad gauge or a plugged line or a faulty sender- that is an ancient car and unless the engine has been rebuilt at some point with a new oil pump, I would suspect that pump is wearing out-

Your Answer:

BMW 3 Series Experts

  • #1
    Tom Demyan
    Reputation
    5,850
  • #2
    Robert Charlson
    Reputation
    1,790
  • #3
    Matt Mankinen
    Reputation
    1,410
View All

Related Models For Sale

Used BMW 5 Series
423 Great Deals out of 16,659 listings starting at $2,000
Used BMW M3
22 Great Deals out of 1,495 listings starting at $5,995
Used Ford Mustang
260 Great Deals out of 37,873 listings starting at $1,350
Used Honda Accord
566 Great Deals out of 103,985 listings starting at $950
Used BMW 7 Series
110 Great Deals out of 4,750 listings starting at $2,399
Used Chevrolet Camaro
233 Great Deals out of 27,354 listings starting at $2,077

Used Cars For Sale

2018 BMW 3 Series For Sale
80 Great Deals out of 8,436 listings starting at $26,276
2017 BMW 3 Series For Sale
64 Great Deals out of 1,916 listings starting at $22,876
2016 BMW 3 Series For Sale
23 Great Deals out of 938 listings starting at $15,498
2015 BMW 3 Series For Sale
211 Great Deals out of 5,171 listings starting at $11,995
2014 BMW 3 Series For Sale
91 Great Deals out of 2,025 listings starting at $9,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.