1987 Chevy Blazer Brand New Oil Pump

1987 CHEVROLET BLAZER
160,000 MILES • 6 CYL • 4WD • AUTOMATIC
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WOLFEN244
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  • 1 POST
What are the chances that a brand new oil pump would lose pressure almost to zero when idling yet works fine with more rpms just after replacement for the same problem from an old pump? Is that possible? Can the relief valve be stuck? Is there another cause? I'm trying to get another pump right now.
Apr 28, 2010 at 6:56 AM
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MHPAUTOS
  • ✓ASE Certified Mechanic
  • 31,937 POSTS
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Hi there,

Thank you for the donation,

I would be checking out the pressure relief valve, make sure it moves freely , there is no muck in the valve and the spring is not damaged, start here.

mark (mhpautos)
Apr 28, 2010 at 7:38 AM
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