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Why does the oil pump lose pressure?

Tiny
PAPA JIM
  • MEMBER
  • 1996 JEEP GRAND CHEROKEE
I just bought a 96 Jeep Grand Cherokee Loredo after sitting for a few years. It runs and drives but why does the oil pump lose pressure? Oil pressure comes up but only for a few seconds and then drops to zero. I added a can of seafoam because that's what was recommended by everyone that I asked about it. Even the parts store guy. Still same thing over and over.
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Saturday, February 18th, 2012 AT 7:35 PM

1 Reply

Tiny
CARADIODOC
  • MECHANIC
  • 33,864 POSTS
Chemicals aren't going to fix a mechanical problem. The first thing is to have the actual oil pressure tested with a mechanical gauge. If it is normal, suspect the sending unit.
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Saturday, February 18th, 2012 AT 8:04 PM

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