Author Topic: Low oil pressure  (Read 5715 times)

Offline SFord

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Low oil pressure
« on: November 30, 2008, 03:45:50 pm »
What causes low oil pressure? Worn bearings or weak oil pump. And how much pressure is normal,or more important is how low can pressure be without spinning a bearing ?

Offline Lt.Del

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Re: Low oil pressure
« Reply #1 on: November 30, 2008, 04:06:43 pm »
do a search on this website....this is answered about once a month. 
Low oil pressure could be a result of a blocked pickup screen in the oil pan. 
I would also be inclined to check your oil sender which tells the guage the pressure. I had to replace mine because it was faulty.  It simply unscrews off.  If it is clogged, it'll give you false readings. 

It isnt hard to replace an oil pump...biggest pain is dealing with the pan.  If it bothers you that much after the aforementioned items are checked, go ahead and replace the pump.

As to what is normal, it should read at least 30 lbs pressure when running, or 15 when idling--or somewhere close.  Mine reads a constant 45 in my sub, and 60+ with my 383 stroker with high volume pump.     

Offline SFord

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Re: Low oil pressure
« Reply #2 on: December 01, 2008, 12:33:21 pm »
Thanks sgt.This the best place for dummies like me to get answers on stuff we know nothing about.But my mama always said a dumb question is the one that wasnt asked.Thanks again for the answer.

Offline Blazin

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Re: Low oil pressure
« Reply #3 on: December 01, 2008, 12:46:59 pm »
73-87 Chevy trucks for dummies!!! ::) ::)
Some people are like Slinkies. Not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs

Offline Lt.Del

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Re: Low oil pressure
« Reply #4 on: December 01, 2008, 01:46:12 pm »
Quote
73-87 Chevy trucks for dummies!!! 

if published, I'd buy it  ;D

Offline joesgarage71

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Re: Low oil pressure
« Reply #5 on: December 02, 2008, 06:41:20 pm »
 I've seen them idle at 5lbs.

Ye Old rule of thumb 10lbs. for every 1000 RPM
78' K-20 355/SM465/twin stick 205 6" on 36's
14 bolt FF/big bearing Dana 44 4.56 gears

92' GMC C-1500 454/4L80E/14 bolt

Offline Captkaos

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Re: Low oil pressure
« Reply #6 on: December 03, 2008, 11:14:26 am »
For a stock motor it should be 7-10lbs at idle and a pound for every 1000 rpm at a minimum.

Offline SFord

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Re: Low oil pressure
« Reply #7 on: December 03, 2008, 09:47:49 pm »
I was a little concerned,but Ive got about 10 to 15 lbs at idle,and about 25 lbs at around 3000 rpm. Thanks.

Offline DnStClr

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Re: Low oil pressure
« Reply #8 on: December 04, 2008, 12:47:50 am »
Did you R&R that pressure sender yet?
Don
87 Chevy Silverado

Offline SFord

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Re: Low oil pressure
« Reply #9 on: December 04, 2008, 06:34:26 pm »
Ive got the oil press. gauge thats got a line going to the block.I aint sure what its called,but it aint electric.

Offline Captkaos

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Re: Low oil pressure
« Reply #10 on: December 04, 2008, 08:29:01 pm »
Mechanical.