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11-04-2006, 01:36 AM
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#1 |
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Registered User
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oil pressure problem
My 03 duramax 6.6L oil pressure is all over the place from 40psi to 80psi while running down the highway and then occationally when iddiling it will drop low and give me a low oil pressure
on the warning light where the odometer reads. any one have any ideas what might be going on? possibly something simple like the pressure sending unit? how is the oil system set up on these? like what are they using for pump style, how is it driven, what is being used for a regulator, etc.. thanks. |
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11-04-2006, 01:12 PM
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#2 |
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Registered User
Status: Offline
Join Date: Jul 2006
Member ID: 50494
Pics: My Gallery
Location: San Diego, CA
Posts: 84
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Re: oil pressure problem
Well if it helps at all, the oil pressure changes as your engine RPM's increase or decrease. However, I don't think it should be giving you the warning light while idling. I think I read you only need 7 PSI while idling. Search for "oil pressure" I think and find the thread that the guy had a similar problem. There is a list of what your oil pressure needs to read while at certain RPM's.
But yeah, no idea why it is fluxuating so much.
Displacement - When you need more than a soda bottle's worth of power.
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11-06-2006, 11:34 AM
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#3 |
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All That Is Man
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Re: oil pressure problem
How's your oil level? Type of oil (brand, synthetic or conventional, viscosity grade, etc.) Please don't take offense to the basic questions...
Drive it like I stole it? Why slow down?
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11-06-2006, 07:50 PM
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#4 |
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Registered User
Status: Offline
Join Date: Mar 2005
Member ID: 25211
Pics: My Gallery
Location: TX
Age: 25
Posts: 979
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Re: oil pressure problem
If your oil level fine I bet it’s the sending unit or gauge/cluster.
 These views expressed on this post are not my own, but rather randomly generated computer gibberish and in no way should be used to judge the author's IQ or mental health. |
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11-06-2006, 09:22 PM
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#5 |
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Registered User
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Re: oil pressure problem
I just got my duramax back from the dealership, they said the gauge cluster went out and replaced it. and said nothing was wrong with the oil pressure. but still the oil pressure drops while iddiling and low alarm comes in. while running down the highway with rpm stedy oil gauge is bouncing - back to the shop it go's. i think a different shop this time, to have the sending unit checked out.
oil level is at the full mark and has not changed. I am running 15W-40 conventional. |
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11-09-2006, 08:54 AM
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#6 |
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Registered User
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Re: oil pressure problem
my cluster had to be replaced when i first got the truck. my pressure in the morning was over 120, and my speedometer would catch and bounce.
2003 Chevy SB CC Duramax Diesel
Edge W/Attitude Monitor KD Boost Valve Afe Stage 2 Air Intake 4" Magna Flow Turbo Back Exhaust Bilstein Shocks High Idle 1972 Chevy 3/4 Ton Project Truck AMSOIL DEALER |
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11-10-2006, 12:55 PM
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#7 |
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Registered User
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Re: oil pressure problem
minimum spec is 14psi hot at idle, and 42 psi hot at 1800rpm
'05 Silver-a-doo LT, CC/SB
Dmax/Ally BIG spinny thing breathing thru two MBRP pipes, lots 'o fuel, and an unblowupable trans. Inside: Some Denali stuff, spaceship dials and guages, "missle launch" switch for the unsuspecting ricer |
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11-16-2006, 08:48 AM
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#8 |
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Registered User
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Re: oil pressure problem
The sending unit was goig out and has been replaced. Thanks for your input
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11-16-2006, 09:11 AM
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#9 |
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All That Is Man
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Re: oil pressure problem
Thanks for posting back w/ the results
Drive it like I stole it? Why slow down?
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