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Old Jan 31, 2009 | 01:45 PM
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Default high oil pressure

Hi guys I am new here and will try to be brief. I have a oil pressure of between 88 and 108 psi. Does anyone know what would push it that High. I have had the C5 for about 3 years and it always runs between 40 and 60. Will it have an adverse effect on the engine and what steps would you take to fix it. I know that the answers could vary greatly just hoping for some info. thanks Jim
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Old Jan 31, 2009 | 01:59 PM
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Originally Posted by jimsprint
Hi guys I am new here and will try to be brief. I have a oil pressure of between 88 and 108 psi. Does anyone know what would push it that High. I have had the C5 for about 3 years and it always runs between 40 and 60. Will it have an adverse effect on the engine and what steps would you take to fix it. I know that the answers could vary greatly just hoping for some info. thanks Jim
Hi ,Typically when the oil pressure sending unit fails it will read very high , It is not fun to change as it lives under the back corner of the intake . They have a re-locater kit so if it ever fails again you don't have to pull the intake . Hope this helps ,there is a ton of posts on this ..
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Old Jan 31, 2009 | 02:59 PM
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Here ya go:

http://forums.corvetteforum.com/c5-t...-relocate.html

If you look on page 4, it gives instructions on how to access it via the windshield wipers.
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Old Jan 31, 2009 | 03:14 PM
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Originally Posted by jimsprint
Hi guys I am new here and will try to be brief. I have a oil pressure of between 88 and 108 psi. Does anyone know what would push it that High. I have had the C5 for about 3 years and it always runs between 40 and 60. Will it have an adverse effect on the engine and what steps would you take to fix it. I know that the answers could vary greatly just hoping for some info. thanks Jim
Search is your friend on this topic.

Welcome
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Old Feb 1, 2009 | 02:02 PM
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The definitive diagnosis for a bad oil pressure sensor is to turn on the ignition but NOT the engine, if your gauge and DIC show any oil pressure, your sensor is bad. There should be no oil pressure with the engine not running.
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Old Feb 1, 2009 | 02:13 PM
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Originally Posted by Oldvetter
The definitive diagnosis for a bad oil pressure sensor is to turn on the ignition but NOT the engine, if your gauge and DIC show any oil pressure, your sensor is bad. There should be no oil pressure with the engine not running.
While that is the most likely culprit, I would not consider that a "definitive" diagnosis. Loss of a ground to the oil pressure sensor will also yield a high oil pressure indication.
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Old Feb 1, 2009 | 02:15 PM
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Originally Posted by at88mph
Here ya go:

http://forums.corvetteforum.com/c5-t...-relocate.html

If you look on page 4, it gives instructions on how to access it via the windshield wipers.
Whatever you do dont cut a hole. It takes all of an hour to remove the intake and change it the right way. There is a step by step on the forum somewhere. It was written up by vectorz. You do not have to replace intake gaskets. Ive had to do mine twice and know problems at all. Also shop around they are making the switches in brass again.........
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Old Feb 2, 2009 | 01:38 AM
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Originally Posted by Slick Rick
Whatever you do dont cut a hole. It takes all of an hour to remove the intake and change it the right way. There is a step by step on the forum somewhere. It was written up by vectorz. You do not have to replace intake gaskets. Ive had to do mine twice and know problems at all. Also shop around they are making the switches in brass again.........


Holes are bad. Pulling the intake is not difficult. Took me maybe 2 hours total to do the job right.
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Old Feb 2, 2009 | 01:45 AM
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From: The artist formally known as NONO5.0 Mobile, Al
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Originally Posted by Slick Rick
Whatever you do dont cut a hole. It takes all of an hour to remove the intake and change it the right way. There is a step by step on the forum somewhere. It was written up by vectorz. You do not have to replace intake gaskets. Ive had to do mine twice and know problems at all. Also shop around they are making the switches in brass again.........

The reason I was recommending the 'cut hole' is because of the high failure rate of the sender. The hole makes it A LOT easier to swap it out. I had a '99 FRC and had replacement senders....one lasted 1 week, the next one just 1 day. The hole made it A LOT easier to replace. In fact I just did this tonight on my '01. In case anyone reads this thread and misses the sticky above, there is a new sender that Advance Auto Parts now carries that has a brass fitting. I installed this one and hopefully it will last. Someone else used this fitting and stated its been working fine for the past 2 months. If mine fails, I'll update this thread as well. If there is a good replacement sender then I agree with the others to pull the intake and do it right. Until then though, JMHO, I used the cut method.
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Old Feb 3, 2009 | 12:32 AM
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88:

To answer your question from the other thread, I had low pressure for about 30 minutes then it went normal. I think it was just air. In any event now it reads about 44 psi and a little higher at higher rpm's but it's consistent. I've never seen 70psi but I've read others who have. The highest I have when cold is 58. If you feel your sender is goofy it has a 1 year warranty and you have an easy access port to reswap it.
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