HIGH OIL PRESSURE (please give ANY advice)
#1
HIGH OIL PRESSURE (please give ANY advice)
I just bought a 2002 Camaro. Everything checks out, and the car runs great. IT IS COMPLETELY STOCK EXCEPT FOR HEADERS.
However, the oil pressure is WAY higher than I am used to (in my old 98 z28, and 99 Firehawk). Even with M1 10w-30 the car is showing a tad over 60psi on a cold start, and tad under 60 when completely warm.
When reving higher than like 3500 or 4000 rpm, it reaches the last hash mark at 80psi.
Has anyone ever had experience with such high oil pressure? Is this something I should really worry about?
Please give me ANY advice/comments on this issue, because I'm getting kind of nervous.
THANKS!
However, the oil pressure is WAY higher than I am used to (in my old 98 z28, and 99 Firehawk). Even with M1 10w-30 the car is showing a tad over 60psi on a cold start, and tad under 60 when completely warm.
When reving higher than like 3500 or 4000 rpm, it reaches the last hash mark at 80psi.
Has anyone ever had experience with such high oil pressure? Is this something I should really worry about?
Please give me ANY advice/comments on this issue, because I'm getting kind of nervous.
THANKS!
#3
Staging Lane
Join Date: Jan 2010
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I had same issue with my last vehicle, ended up being oil sending unit. I had my pressure checked manually at a GM dealer to be safe and then i changed the sending unit myself. Here is info from GM Service Manual.
Document ID# 10220
2002 Chevrolet Camaro
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Oil Pressure High or Low
Oil Pressure High or Low Checks
Causes
Oil Pump Assembly (4)
• Pressure regulator valve stuck
• Pressure regulator valve spring
• Rotor guide omitted or misassembled
• Rotor cracked or broken
• Reverse boost valve or sleeve stuck, damaged or incorrectly assembled
• Orifice hole in pressure regulator valve plugged
• Sticking slide or excessive rotor clearance
• Pressure relief ball not seated or damaged
• Porosity in pump cover or body
• Wrong pump cover
• Pump faces not flat
• Excessive rotor clearance
Oil Filter (72)
• Intake pipe restricted by casting flash
• Cracks in filter body or intake pipe
• O-ring seal missing, cut or damaged
• Wrong grease used on rebuild
Control Valve Body (60)
• Manual valve scored or damaged
• Spacer plate or gaskets incorrect, misassembled or damaged
• Face not flat
• 2-3 Shift valve stuck
• Checkballs omitted or misassembled
Pressure Control Solenoid (377)
Damage to electrical terminals
Transmission Fluid Pressure Manual Valve Position Switch (69)
• Contamination
• Damaged seals
Case (103)
Case to control valve body face not flat
System Voltage
• 12 volts not supplied to transmission
• Electrical short (pinched solenoid wire)
• Solenoid not grounded
--------------------------------------------------------------------------------
Document ID# 10220
2002 Chevrolet Camaro
--------------------------------------------------------------------------------
Oil Pressure High or Low
Oil Pressure High or Low Checks
Causes
Oil Pump Assembly (4)
• Pressure regulator valve stuck
• Pressure regulator valve spring
• Rotor guide omitted or misassembled
• Rotor cracked or broken
• Reverse boost valve or sleeve stuck, damaged or incorrectly assembled
• Orifice hole in pressure regulator valve plugged
• Sticking slide or excessive rotor clearance
• Pressure relief ball not seated or damaged
• Porosity in pump cover or body
• Wrong pump cover
• Pump faces not flat
• Excessive rotor clearance
Oil Filter (72)
• Intake pipe restricted by casting flash
• Cracks in filter body or intake pipe
• O-ring seal missing, cut or damaged
• Wrong grease used on rebuild
Control Valve Body (60)
• Manual valve scored or damaged
• Spacer plate or gaskets incorrect, misassembled or damaged
• Face not flat
• 2-3 Shift valve stuck
• Checkballs omitted or misassembled
Pressure Control Solenoid (377)
Damage to electrical terminals
Transmission Fluid Pressure Manual Valve Position Switch (69)
• Contamination
• Damaged seals
Case (103)
Case to control valve body face not flat
System Voltage
• 12 volts not supplied to transmission
• Electrical short (pinched solenoid wire)
• Solenoid not grounded
--------------------------------------------------------------------------------
Last edited by wisker27; 04-18-2010 at 07:10 PM.
#5
TECH Addict
Join Date: Jun 2009
Location: Tulsa, OK
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#8
Thanks, thats pretty much what I figured. I see that it moves the way it should with the rpm. I'm not sure if I should waste my time/money to hook up a manual pressure sensor to make sure nothing is wrong.
Also, Mine drops after warm but only drops about 5 to 10 psi at the most. Is this normal? I'm mainly hoping it's nothing serious.
Also, Mine drops after warm but only drops about 5 to 10 psi at the most. Is this normal? I'm mainly hoping it's nothing serious.
#10
These stockers are more like a relative and not absolute gauge reading. As long as you know baseline of X pressure, your relative motion is set accordingly. I haven't looked into how these particular sensors work, but I would imagine something along the lines of varying voltage depending of the pressure put on the diaphragm in the unit. If that is the case, I would imagine the tolerances would be quite high and therefor, be an inaccurate absolute unit, just a descent relative one.
#11
TECH Resident
iTrader: (5)
Not to hijack the thread but I drive an 02 trans am. My pressure is at 60 and goes accordingly with acceleration but is it safe to drive as is? I am understanding that the gauges are not too accurate but I just wanted to check. Also op you should update us on what happens with the gauge and how your pressure turns out.
#16
Staging Lane
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Location: Ankeny,iowa
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Spend $60 and have a GM Dealer check it with a manual gauge to see what you are actually running for pressure just for peace of mind. May save you some grey hairs worrying about it as well.
#18
Staging Lane
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yep, here is the PDF of the Service Repair Information for Sender replacement. I can email the Manifold Replacement Service Information if you need it. Too big to attach, anything else let me know i have the GM Service Repair Archived or server for pretty much all Chevy Vehicles to 2005.
Last edited by wisker27; 04-20-2010 at 04:40 PM.