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Truck runs but there is no oil pressure.

Tiny
MADCOWMOTORS
  • MEMBER
  • 1991 TOYOTA PICKUP
  • 250,000 MILES
1991 Toyota Pickup 4wd 5spd 4 cylinder 22RE with no oil pressure

Replaced timing chain, timing chain cover, water pump & oil pump. Truck runs but there is no oil pressure. Did a manual check for oil at pressure sensor bung & oil filter & no oil is flowing. Have since packed oil pump & pressure was restored. Turned vehicle off to put drive belts back on & restarted vehicle with no oil pressure again. Have repacked pump, changed oil, filter & replaced new oil pump with another new oil pump. Checked passages for blockage & seemingly clear. Oil runs freely when poured through via funnel. PLEASE HELP.
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Wednesday, January 9th, 2013 AT 8:06 AM

2 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
You may have a cracked oil pick up tube or the gasket between the pick up tube and pump is not sealing, causing oil to drain out after priming and when running pump is sucking air.
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Wednesday, January 9th, 2013 AT 8:33 AM
Tiny
MADCOWMOTORS
  • MEMBER
  • 6 POSTS
Thank you. Definitely worth a look. I will post next time I work on the truck.
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Thursday, January 10th, 2013 AT 7:01 AM

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