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1993 Ford F-150 no oil pressure

Tiny
MIKE DOLAN
  • MEMBER
  • 1993 FORD F-150
  • V8
  • 2WD
  • AUTOMATIC
  • 267,000 MILES
I had no oil pressure, so I put a new oil pump on. The shaft is good tight, pick up tube clean &clear distributor is good. Now I have pressure for about 10 min. And its gone again and motor starts to tap and knock. Please help.
Tuesday, January 6th, 2009 AT 5:16 PM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Sounds like engine bearings when things starts getting heat up on the crankshaft the bearing clearance increases therefore dropping the oil pressure-could also be the oil pump pressure relief valve sticking.
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Tuesday, January 6th, 2009 AT 5:22 PM
Tiny
MIKE DOLAN
  • MEMBER
  • 4 POSTS
Could the oil go to the heads and not come down for a while and the pickup is sucking air
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Tuesday, January 6th, 2009 AT 5:43 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
That's if the oil gallieries are clogged-up-Did you actually check the oil pressure with a mechanical gauge?
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Wednesday, January 7th, 2009 AT 2:06 PM

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