Oil Peessure dropping very low when sitting at stop light.

35

Asked by Mar 27, 2017 at 08:29 PM about the 1989 Chevrolet Corvette Coupe RWD

Question type: Maintenance & Repair

When I stop in my 89 at a stop light.  The temp immediately jumps to above 210
to 225.  When this happens my oil pressure drops to 4-6 on gauge. Cold it is at
50+, I have replace oil pump with a melling high volume/high pressure pump
and no change.  I even tried a 165 thermostat, no joy. Any ideas?

5 Answers

9,865

Your problem is not the pump. The engine has internal wear, either rod or main bearings have large clearances and it gets worse as the oil heats up, because oil looses viscosity when hot. Replacing the thermostat with a colder setting will help a little but once you ramp speed up, oil pressure drop pressure again. How many miles on it?

119,905

You may have a worn engine but I would first have the oil pressure checked with a mechanical gauge so that you know for sure what is going on. The problem might just be a bad oil pressure sending unit.

67,705

What grade oil are you running in it?

119,905

Bob, You lost the cool sunglasses?

Hi i I own a 1987 corvette 76800 mil I turn the key engine rotate battery new but some times do not start to start I have before put my key run the fuel pump manually thru the pump relay for 2 seconds then the car run normally some people tell me is the oil pressure switch that control the system. If this fail can you give some idea? Waht to do? Thanks Alex metzler

Your Answer:

Corvette

Looking for a Used Corvette in your area?

CarGurus has 518 nationwide Corvette listings starting at $10,700.

Postal Code:

Chevrolet Corvette Experts

  • #1
    John Carson
    Reputation
    2,880
  • #2
    Vincent Parker
    Reputation
    2,150
  • #3
    Tom Demyan
    Reputation
    1,750
View All

Related Models For Sale

Used Chevrolet Camaro
11 Great Deals out of 922 listings starting at $11,500
Used Ford Mustang
34 Great Deals out of 1,238 listings starting at $4,685
Used Porsche 911
11 Great Deals out of 236 listings starting at $15,945
Used Ford F-150
132 Great Deals out of 11,559 listings starting at $3,900
Used Jeep Wrangler
17 Great Deals out of 1,887 listings starting at $3,494
Used BMW M3
6 Great Deals out of 59 listings starting at $16,991
Used Mercedes-Benz SL-Class
6 Great Deals out of 118 listings starting at $13,995

Used Cars For Sale

2019 Chevrolet Corvette For Sale
149 listings starting at $67,790
2018 Chevrolet Corvette For Sale
43 listings starting at $63,041
2017 Chevrolet Corvette For Sale
68 listings starting at $59,995
2016 Chevrolet Corvette For Sale
43 listings starting at $55,995
2015 Chevrolet Corvette For Sale
24 listings starting at $54,977

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.