my 1998 S10 truck with a 4 cyd engine has oil pressure of 60 psi at start up but slowly drops back to 20 psi and neqr sreo when I stop. What might be the cause?


Asked by Sep 21, 2014 at 06:37 PM about the 1998 Chevrolet S-10

Question type: Maintenance & Repair

di i need a new oil pump?

2 Answers


Do you have high mileage on your truck? My '03 S-10 pick up, also with the 2.2 L 4 cylinder, shows about 25 PSI on the dash gauge at idle and fully warmed up. It's got just under 283,000 miles on the original engine. Low oil pressure at idle is usually the first warning sign of bad bearings. But to be sure, get a cheapo beepo mechanical oil pressure gauge, for testing purposes, just to be certain that the oil pressure is really low. If it is, it could be a failing oil pump, bad bearings, clogged pick up screen in the oil pan, or even a faulty oil filter. HTH. -Jim

1 out of 1 people think this is helpful.
John Carson

How about a bad sensor or even a tired gauge? Put a heavier weight oil in the engine and see if that helps some. I have high mileage on my Buick and had the low oil light come on on start up. I traded the 30 weight for 40 weight and that stopped the problem. Those Chevy four banger motors were not made to last too long. They have been referred to "throw away motors" due to the soft metal used in the engine castings. That many miles shows good care. Good job, and keep on trucking. The aluminum engines will warp and change shape ever so slightly that will cause a break in some of the oil seals that maintain top oil pressure inside the engine. I had a transmission that the tail housing got out of round and the bearings would not seat so I kept losing oil from the transmission. I was told there was no fix as the rear housing could not be made round to fit the replacement bearings. "throw away transmissions". I thew away the truck.

2 out of 2 people think this is helpful.

Your Answer

Add photo

Related Questions

  • My 2001 S10 has a hard starting problem if the truck sits between 1 to 4 hours. It starts fine if left over night. Has 46,000 miles. 77 answers

    Cranks for about ten seconds before it starts.

    2001 Chevrolet S-10 4 Dr LS 4WD Crew Cab SB


    Maintenance & Repair

  • Why is my fuel pressure high? 2 answers

    Pressure with engine off is 41 PSI but while running it jumps to 60 PSI. Volume test while running was also poor.

    1994 Chevrolet S-10 2 Dr LS Extended Cab SB


    Maintenance & Repair

  • Chevy S10 overheating 50 answers

    I have a 1994 Chevy S10 that was overheating...I flushed the system, replaced the radiator and thermostat...that seemed to fix the problem...that was in last its overheating again...t...

    1994 Chevrolet S-10 2 Dr STD Standard Cab LB


    Maintenance & Repair

  • 2002 S10 4.3 Fuel Issue 1 answer

    So a few weeks ago I was pulling up to a stoplight and as I came to slow down I got to about 5 MPH and the truck just shot off, thought it was because I was too low on gas or a bad battery, but no...

    2002 Chevrolet S-10 3 Dr LS Extended Cab SB


    Maintenance & Repair

  • OIl pressure still drops after changing oil sending unit? 83 answers

    When truck is first started, oil pressure is normal, around 40 psi. When engine temp starts up, oil pressure slowly falls until "Stop Engine - Low Oil Pressure" warning comes on. Switch truck off a fe...

    2009 Chevrolet Silverado 1500 LTZ Crew Cab 4WD


    Maintenance & Repair


Looking for a Used S-10 in your area?

CarGurus has 1,813 nationwide S-10 listings starting at $1,749.


Search Chevrolet S-10 Questions

Chevrolet S-10 Experts

#1 Andrew Olsen
Andrew Olsen
Reputation 1,970
#2 John Saffrahn
John Saffrahn
Reputation 890
#3 Trebor66
Reputation 840
View All

Related Models For Sale

Used Ford Ranger"
255 Great Deals out of 7,800 listings starting at $988
Used Chevrolet Silverado 1500"
2,429 Great Deals out of 143,996 listings starting at $1,995
Used GMC Sonoma"
9 Great Deals out of 582 listings starting at $1,799
Used Toyota Tacoma"
647 Great Deals out of 30,295 listings starting at $2,850
Used Ford F-150"
3,163 Great Deals out of 216,428 listings starting at $1,000
Used Dodge Dakota"
157 Great Deals out of 4,803 listings starting at $900
Used Chevrolet Blazer"
1,629 listings starting at $1,999
Used Nissan Frontier"
430 Great Deals out of 20,685 listings starting at $2,500
Used GMC Sierra 1500"
1,019 Great Deals out of 56,345 listings starting at $2,400
Used Dodge Ram 1500"
513 Great Deals out of 13,857 listings starting at $995
Used Chevrolet C/K 1500"
1,148 listings starting at $2,400
Used Ford Mustang"
722 Great Deals out of 41,401 listings starting at $900
Used Chevrolet Camaro"
796 Great Deals out of 38,871 listings starting at $2,650

Used Cars For Sale

2004 Chevrolet S-10 For Sale
62 listings starting at $2,695
2003 Chevrolet S-10 For Sale
5 Great Deals out of 431 listings starting at $1,749
2002 Chevrolet S-10 For Sale
5 Great Deals out of 273 listings starting at $2,450
2000 Chevrolet S-10 For Sale
284 listings starting at $2,500