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I am losing oil pressure when coming to a stop

Tiny
BHAYES77
  • MEMBER
  • 1986 CHEVROLET MONTE CARLO
I have a 1986 monte carlo ss with a 305 we have rebuilt the engine new cam all new bearings (main, rob, and cam)all new gaskets new piston rings etc. Before and after the rebuild now it loses oil pressure after it warms up when you first start it up it holds about 40lbs when it warms up it drops to 10-25lbs going down the road it holds 25-30+lbs when you come to a stop it drops to 0 what is wrong we have even changed the part the oil filter screws to
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Sunday, November 27th, 2011 AT 1:54 AM

6 Replies

Tiny
MHPAUTOS
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Did you fit a new oil pump?
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Sunday, November 27th, 2011 AT 2:09 AM
Tiny
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Also did you check the oil clearances?
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Sunday, November 27th, 2011 AT 2:12 AM
Tiny
BHAYES77
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Yes it has a new oil pump and when we rebuilt the engine we did everything to factory specs we used plastgauge and set everything
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Sunday, November 27th, 2011 AT 2:14 AM
Tiny
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Check for a faulty oil pressure relief valve, I would start here.
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Sunday, November 27th, 2011 AT 2:16 AM
Tiny
BHAYES77
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Is that under the oil filter
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Sunday, November 27th, 2011 AT 2:20 AM
Tiny
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To early to check on Mitchel 1 but it should be in the oil pump.
Oil pick up not sucking air? Not cracked in the pick up pipe?
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Sunday, November 27th, 2011 AT 2:37 AM

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