1978 Chevy Camaro low oil pressure

Tiny
ICYONE
  • 1978 CHEVROLET CAMARO

Engine Mechanical problem
1978 Chevy Camaro V8 Two Wheel Drive Automatic 42000 miles

hello, I just recently built a 350 for my camaro and now I have it running im having a problem with the oil pressure. When I first start it and its cold im getting around 60-70 pounds of oil pressure but after it warms up the pressure drops to around 7-10 pounds and the oil light comes on while ideling but as soon as you touch the gas it shoots right back up and the light goes off, I have both mechanical guage and oil light, what could be the problem. Stats are motor has less than 25 miles on it and im using 20w-50 oil

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Thursday, November 4th, 2010 AT 11:56 AM

9 Replies

Tiny
RASMATAZ
  • MEMBER

Hi icyone, Welcome to 2carpros and TY for the donation

Did you put on a crankshaft kit or you have the crankshaft reground and use undersize bearings-is it knocking?

Could be excessive engine bearing clearances or the oil pressure relief valve sticking or air in it

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Thursday, November 4th, 2010 AT 3:36 PM
Tiny
ICYONE
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I bought the short block already done. New bearings, crank, pistons rods, if I shut off the car and let it cool down I can restart it with around 60 p.S, I and there is no noise from the motor only after it runs for a little bit the pressure drops to almost 0 and you can start to hear a faint knock

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Thursday, November 4th, 2010 AT 3:47 PM
Tiny
ICYONE
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I have noticed that the distributor is in and I have it clamped down but you can still wiggle it a little would that have anything to do with it?

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Thursday, November 4th, 2010 AT 3:55 PM
Tiny
RASMATAZ
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Sounds like engine bearings to me

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Thursday, November 4th, 2010 AT 3:55 PM
Tiny
RASMATAZ
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Remove the distributor and inspect the oil pump drive gear-BTW did you prime the oil pump before you start it-

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Thursday, November 4th, 2010 AT 3:58 PM
Tiny
ICYONE
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Would it be a good idea to try a new oil pump before I tear the motor out and dissamble it

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Thursday, November 4th, 2010 AT 4:00 PM
Tiny
ICYONE
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I primed the oil pump before assembly I also primed the engine before I started it

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Thursday, November 4th, 2010 AT 4:02 PM
Tiny
RASMATAZ
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Yes it does and try and get a high volume pump aand make sure you prime it before you fire it up

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Thursday, November 4th, 2010 AT 4:02 PM
Tiny
ICYONE
  • MEMBER

Ok I will get a high volume pump for it and yes I will make sure to prime the engine. Will advise you of progress

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Thursday, November 4th, 2010 AT 4:06 PM

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