High oil pressure. Any ideas?
Thread Starter
Melting Slicks
Joined: Jul 2003
Posts: 2,529
Likes: 0
From: Gonzales LA
High oil pressure. Any ideas?
I pulled into work this morning and noticed that my oil pressure needle was pegged out at 80 psi. I flipped to the page on my DIC and it said 129 psi. 
Car is running fine and there are no check engine warnings and all engine/oil/coolant temperatures seem to be normal. What could be causing this and if it really is running 129 psi what would be some of the symptoms to look for (besides exploding hoses and puddles of oil under the car)?
Car is running fine and there are no check engine warnings and all engine/oil/coolant temperatures seem to be normal. What could be causing this and if it really is running 129 psi what would be some of the symptoms to look for (besides exploding hoses and puddles of oil under the car)?
Burning Brakes
Joined: Jul 2004
Posts: 932
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From: Las Cruces New Mexico
Oil pressure sensor. Mine did the same thing last March. Driving down the road and it pegs out at 129. Around here you can only get the part at the dealer plus 300.00 to put install it. If you are handy there is a good post in the help section on how to install it yourself. I drove mine for several months with a bad sensor until I had time to fix it.
Thread Starter
Melting Slicks
Joined: Jul 2003
Posts: 2,529
Likes: 0
From: Gonzales LA
Originally Posted by rcknusa
Oil pressure sensor. Mine did the same thing last March. Driving down the road and it pegs out at 129. Around here you can only get the part at the dealer plus 300.00 to put install it. If you are handy there is a good post in the help section on how to install it yourself. I drove mine for several months with a bad sensor until I had time to fix it.
I thought it may be the sensor since everything seems to be running fine. I just wanted to make sure there weren't other issues I should be looking for before I burned my engine up. Thanks for the info. I'll check out that help post.
Burning Brakes
Joined: Jul 2004
Posts: 1,119
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From: Spring Branch Texas
Best way to really tell if its the sensor is to turn the key on but DO NOT start the engine. If your sensor is bad, you will get a pressure reading when the motor IS NOT running. It's about a $40 part. Replacement is relatively easy. Only pain is you have to loosen and move the intake manifold forward to get to the sensor. $300 labor should be illegal!!!!!!!! 
Thread Starter
Melting Slicks
Joined: Jul 2003
Posts: 2,529
Likes: 0
From: Gonzales LA
Originally Posted by RCK1999
Best way to really tell if its the sensor is to turn the key on but DO NOT start the engine. If your sensor is bad, you will get a pressure reading when the motor IS NOT running. It's about a $40 part. Replacement is relatively easy. Only pain is you have to loosen and move the intake manifold forward to get to the sensor. $300 labor should be illegal!!!!!!!!
Safety Car
Joined: Nov 2003
Posts: 4,979
Likes: 5
From: San Diego, CA "leaf" "tee" "e"
This problem and diagnosis is covered in the Sticky in C5 General which links to the solution in our Tech Tips.
Eugene
Eugene
Intermediate
Joined: Sep 2003
Posts: 25
Likes: 0
From: Corpus Christi Texas
Mine went out a few weeks back and replaced with the help of a neighbor mechanic for $80....
Alas....One week passed by and that stupid thing broke again!!!!
I could not believe it...
Even though my GM dealer was not at fault he got an earful about GM parts...
Alas....One week passed by and that stupid thing broke again!!!!
I could not believe it...
Even though my GM dealer was not at fault he got an earful about GM parts...
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Michael S. Palmer
Intermediate
Joined: Sep 2003
Posts: 25
Likes: 0
From: Corpus Christi Texas
No ... the part is around $20-25, (with a mechanic's discount) but I paid $80 for labor...not too bad considering the $300 Chevy charges right?
Also...the dealer mentioned that he had customers replacing their units that failed during big temperature changes.....I wonder if big drops in temperature make that thing fail.......
That would be just insane...
Also...the dealer mentioned that he had customers replacing their units that failed during big temperature changes.....I wonder if big drops in temperature make that thing fail.......
That would be just insane...
Le Mans Master
Joined: Jul 2002
Posts: 7,370
Likes: 8
From: Slave to the evil empire
Cruise-In V Veteran
St. Jude Donor '04
Originally Posted by thec5vette
Mine went out a few weeks back and replaced with the help of a neighbor mechanic for $80....
Alas....One week passed by and that stupid thing broke again!!!!
I could not believe it...
Even though my GM dealer was not at fault he got an earful about GM parts...
Alas....One week passed by and that stupid thing broke again!!!!
I could not believe it...
Even though my GM dealer was not at fault he got an earful about GM parts...