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

23,215

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
    5,040
  • #2
    Robert Charlson
    Reputation
    1,620
  • #3
    Matt Mankinen
    Reputation
    1,240
View All

Related Models For Sale

Used BMW 5 Series
475 Great Deals out of 16,450 listings starting at $1,995
Used BMW M3
48 Great Deals out of 1,799 listings starting at $5,995
Used Ford Mustang
711 Great Deals out of 38,332 listings starting at $895
Used Chevrolet Camaro
427 Great Deals out of 30,919 listings starting at $3,550
Used BMW 7 Series
153 Great Deals out of 5,829 listings starting at $2,999
Used Honda Accord
1,133 Great Deals out of 62,428 listings starting at $1,199

Used Cars For Sale

2017 BMW 3 Series For Sale
197 Great Deals out of 8,213 listings starting at $24,984
2016 BMW 3 Series For Sale
56 Great Deals out of 1,716 listings starting at $18,980
2015 BMW 3 Series For Sale
52 Great Deals out of 1,387 listings starting at $15,995
2014 BMW 3 Series For Sale
285 Great Deals out of 5,551 listings starting at $11,995
2013 BMW 3 Series For Sale
58 Great Deals out of 1,603 listings starting at $10,495

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.