Oil pump

Asked by GuruC2TKY Mar 05, 2019 at 08:16 AM about the 2010 Toyota Corolla

Question type: Maintenance & Repair

I have overhauled my car's engine. New bearings, rings, water pump, oil pump, full gasket set. After starting the car, I checked the oil pressure with a oil pressure gauge. The oil pressure was 60PSI. When revving the car slowly. the oil pressure dropped to 0 PSI. I then fitted a second new oil pump but it still does the same. What can be wrong?

6 Answers

22,185

Could be possible that the oil is not returning to the pan quick enough. If the pump is pushing too much oil to the top of the engine, the sump may be running dry which will drop the pressure to 0. Does the oil pressure return if you stop the engine for a minute and restart?

3 people found this helpful.

Maybe the bearings have too much clearance? If you did not machine the crank you may need to tear the engine down and do it over.

1 people found this helpful.

Gary your answer was the best. Yes after switching off the engine for a minute, the pressure is back. What could probably the problem be?

22,185

The oil returns to the pan through journals from the head to the block. I hate to say it but it may be that the head gasket was improperly installed, blocking the returns. I am not familiar with your engine but you can probably pull the valve cover and check for blocked oil return passages.

1 people found this helpful.
Best Answer Mark helpful

Your Answer:

Corolla

Looking for a Used Corolla in your area?

CarGurus has 1,961 nationwide Corolla listings starting at $1,995.

Postal Code:

CarGurus Experts

  • #1
    Jeff Polhemus
    Reputation
    3,430
  • #2
    Gene Arnett
    Reputation
    3,280
  • #3
    hashimmir
    Reputation
    2,520
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Toyota Camry
51 Great Deals out of 944 listings starting at $2,212
Used Honda Civic
162 Great Deals out of 3,375 listings starting at $2,230
Used Honda Accord
43 Great Deals out of 914 listings starting at $2,799
Used Toyota RAV4
88 Great Deals out of 2,026 listings starting at $3,499
Used Honda CR-V
92 Great Deals out of 3,817 listings starting at $1,995
Used Toyota Tacoma
53 Great Deals out of 1,029 listings starting at $8,708
Used Hyundai Elantra
159 Great Deals out of 3,178 listings starting at $1,850
Used Mazda MAZDA3
76 Great Deals out of 1,533 listings starting at $2,299
Used Toyota Prius
9 Great Deals out of 127 listings starting at $2,995
Used Nissan Sentra
63 Great Deals out of 1,840 listings starting at $2,495
Used Toyota 4Runner
15 Great Deals out of 341 listings starting at $9,900
Used Toyota Highlander
24 Great Deals out of 719 listings starting at $6,495

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. Content will be removed if CarGurus becomes aware that it violates our policies.