jason2687

iTrader: (2)

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!

jason2687

iTrader: (2)

Also, the car is an M6

wisker27

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



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jason2687

iTrader: (2)

So your sending unit was just reading a little higher than the ACTUAL pressure of the system?

I'm hoping that this is the case, rather than something more serious....

fleetmgr

That's what usually happens. Move pressure check with a real gauge to the top of the list, then replace OPSU.

jason2687

iTrader: (2)

bump for some more opinions

LS6427

iTrader: (2)

My cold start is 58psi. But then drops to about 40-42psi after it warms up.

Those gauges aren' very accurate, just a guide to know what your individual engine is doing over time.

Use a gauge tool like mentioned to see whats up.

.

jason2687

iTrader: (2)

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.

jason2687

iTrader: (2)

Bump, anybody else before I get a manual gauge?

1SLwLS1

iTrader: (6)

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.

beyonddisturbed

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.

thatguy383

iTrader: (1)

my camaro and silverado read at 60+psi on acceleration, camaro always has, silverado does after fresh oil. Camaro even touches "80" on the gauge sometimes. I'm not worried at all.

beyonddisturbed

iTrader: (5)

Ya I figured as such but nice to have the peace of mind!

jason2687

iTrader: (2)

Yea, I'm also hoping it's safe to drive because I have been assuming that everything is "ok" for now.

Can this increased pressure be due to the LS6 oil pump??

fleetmgr

More likely is the increased pressure isn't really increased, just the vagaries of the factory gauge. In any event, it's not a problem.

wisker27

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.

jason2687

iTrader: (2)

Yea, thats what I was thinking....I was going to do it myself but I'm not sure if you need to get to the oil pressure sending unit? If so, I'm thing you will have to take off the manifold....

wisker27

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.

ICRAZY6

iTrader: (68)

If the pump is after market there is a different spring that can be installed to give you more oil pressure. Might not be the case here. But mine is always at 60psi with an SLP oil pump and the higher spring.