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Old 09-04-2009, 05:00 PM   #1
3r!c84
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oil pressure

oil pressure .mines been running high like 40-60 is that bad?
a few weeks ago it was like 20-40
where sould it be at?

oh its a stock 305
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Old 09-05-2009, 08:34 PM   #2
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Re: oil pressure

anyone?
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Old 09-05-2009, 09:47 PM   #3
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Re: oil pressure

have you recently changed oill or done anything else to the motor
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Old 09-05-2009, 09:53 PM   #4
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Re: oil pressure

nope
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Old 09-06-2009, 10:22 PM   #5
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Re: oil pressure

40 to 60 pounds of pressure is not a problem, but if you only had 20 to 30 psi before. then something had to change somewhere. the filter has a bypass valve inside of it which could possibly stick shut and cause the pressure to change. also the oil pump has a pressure regulater valve that could be sticking. i have seen cam bearings spin in the block and cause the pressure to go up. your gauge could be acting up also. i would change the oil and filter and cut the filter open to check for metal. is your engine making any noise.
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Old 09-06-2009, 10:29 PM   #6
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Re: oil pressure

no noises.like ticking or clickin.its been running good.ive been thinking the gauge was acking up.is there any way to check this? where is the oil pressure sensor?
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Old 09-09-2009, 01:05 AM   #7
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Re: oil pressure

I'm sure your motor is fine, almost all chevy's I've seen do that.

A safe rule is 10 psi for every 1000 rpm. I drove my '68 Satellite with a 318 with NO oil pressure for 10-15 miles with absolutely no problems. Ended up doing a rebuild, but it was still mechanically fine.
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Old 09-09-2009, 06:19 AM   #8
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Re: oil pressure

did you change the type or weight of oil?

another thing to note,

it is not uncommon to see a sbc with 5-10psi at idle. on my 350, it runs about 45psi @ 3k.

at idle, it's 10-15psi.
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Old 09-09-2009, 06:31 AM   #9
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Re: oil pressure

Quote:
Originally Posted by project_77 View Post
did you change the type or weight of oil?

another thing to note,

it is not uncommon to see a sbc with 5-10psi at idle. on my 350, it runs about 45psi @ 3k.

at idle, it's 10-15psi.
no its umm 10w30 or somthing (ill look after school today)
at start up its at like 20-30 and idling it says the same around 3-4k it gits up pritty high at 40-45.but just driving at 2100 its at 35
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Old 09-09-2009, 06:45 AM   #10
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Re: oil pressure

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Originally Posted by 3r!c84 View Post
no its umm 10w30 or somthing (ill look after school today)
at start up its at like 20-30 and idling it says the same around 3-4k it gits up pritty high at 40-45.but just driving at 2100 its at 35

is that at cold start-up or warm start-up? oil pressure should be greater during a cold start-up.
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Old 09-09-2009, 08:52 AM   #11
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Re: oil pressure

i know when my 86 chevy k10 with the 305 when its cold it pegs the gauge out till it gets warmed up like 10 mins then goes to about 45-50 pounds i use 10w-40
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Old 09-09-2009, 09:41 AM   #12
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Re: oil pressure

Your pressure is fine. Nothing to worry about. From the numbers your saying...and your not hearing any noises or differences, just keep driving.
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