C5 oil pressure switch bad?
Thread Starter
Instructor
Joined: Dec 2009
Posts: 208
Likes: 6
From: Baltimore MD
C5 oil pressure switch bad?
suddenly my oil pressure gauge is reading 80 psi. it is also like this with the engine off but key on. it normally is about 40 or so with engine running. oil level is correct. i am guessing it is bad. just want other opinions. also where is it located?
thanks in advance for the replies.
thanks in advance for the replies.
Safety Car
Joined: Mar 2005
Posts: 3,757
Likes: 1,215
From: Wisconsin
Common problem, the sensor is located in back of the intake manifold. Couple different ways to replace it lots of threads on it
https://www.corvetteforum.com/forums/c5-tech/1817090-updated-again-8-25-13-ultimate-diy-faq-thread-it-s-all-in-here.html
Post number 73
https://www.corvetteforum.com/forums/c5-tech/1817090-updated-again-8-25-13-ultimate-diy-faq-thread-it-s-all-in-here.html
Post number 73
Le Mans Master
Joined: Feb 2012
Posts: 6,644
Likes: 479
From: OK
Yup bad OPS... replace/relocate
1 take it to a professional have it replaced.
2 replace it yourself.
Methods
The SNEAK in there and get it method
The REMOVE the intake method...
The Access hole in the wiper tray method...
Had a hard time find good info on this method....weird, been lots of post on it, and it can be done neatly... this isn't the best link, but gives you an idea of what can be done...
https://www.corvetteforum.com/forums...placement.html
Relocation is recommended with any method... the OPS lives in a very unfriendly environment and will be happier when relocated.
https://www.corvetteforum.com/forums...c5-oil-sender-
1 take it to a professional have it replaced.
2 replace it yourself.
Methods
The SNEAK in there and get it method
The REMOVE the intake method...
The Access hole in the wiper tray method...
Had a hard time find good info on this method....weird, been lots of post on it, and it can be done neatly... this isn't the best link, but gives you an idea of what can be done...
https://www.corvetteforum.com/forums...placement.html
Relocation is recommended with any method... the OPS lives in a very unfriendly environment and will be happier when relocated.
https://www.corvetteforum.com/forums...c5-oil-sender-
Last edited by 73Corvette; May 4, 2015 at 10:07 AM.
Drifting
Joined: Jan 2001
Posts: 1,347
Likes: 4
From: Slidell La
My wife and I pulled the manifold and did mine twice. I found the wiring harness from the factory was short and putting a lot of stress on the top of the sender. I did an F15 wiring repair and put a stress relief loop in the harness so there is no tension on the unit and it has worked great since then. WARNING use OEM replacement part on this. I ordered one and it was missing the gasket so I went bought napa part and installed, Wow was the pressure reading off, might be ok for a truck. I put OEM back on and it was exact pressure
Melting Slicks
Joined: Sep 2002
Posts: 3,311
Likes: 8
From: Plano Texas
St. Jude Donor '12-'13-'14-'15-'16-'17
I would take the extra time and do the relocation, will make the next time you change it a snap, and trust me it will happen again.
https://www.corvetteforum.com/forums...post1562145914
I did the relocation and used the buick sender part # 12584940 and have had no problems.
https://www.corvetteforum.com/forums...post1562145914
I did the relocation and used the buick sender part # 12584940 and have had no problems.
Last edited by Navybluevette; May 7, 2015 at 08:59 AM.
Race Director
Joined: Jan 2008
Posts: 16,028
Likes: 170
From: oregon
My wife and I pulled the manifold and did mine twice. I found the wiring harness from the factory was short and putting a lot of stress on the top of the sender. I did an F15 wiring repair and put a stress relief loop in the harness so there is no tension on the unit and it has worked great since then. WARNING use OEM replacement part on this. I ordered one and it was missing the gasket so I went bought napa part and installed, Wow was the pressure reading off, might be ok for a truck. I put OEM back on and it was exact pressure
the ac delco sensor is fine, but, the borg warner one orileys sells has also proven to be very reliable
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Race Director
Joined: Jul 2004
Posts: 16,795
Likes: 62
From: Lake Havasu City, AZ
The key to longevity is to not over torque the new one.
IIRC the spec if 15 ft-lbs.... take it to that level in 3 steps.....
10, 12,15....
My replacement lasted over 40K (s)miles in my '01 before I sold it.
IIRC the spec if 15 ft-lbs.... take it to that level in 3 steps.....
10, 12,15....
My replacement lasted over 40K (s)miles in my '01 before I sold it.
Melting Slicks
Joined: Mar 2009
Posts: 2,300
Likes: 115
From: Odessa FL
St. Jude Donor '10-'12-'13-'14-'15-'16-'17
Mine went at about 40K original miles. Since I was just starting the engine build I did the relocation and used a brass unit from O'Riellys. It is now up on the side of the manifold (drivers side) for easy access should it fail again.
Thread Starter
Instructor
Joined: Dec 2009
Posts: 208
Likes: 6
From: Baltimore MD
ok, i got the new switch. i read and watched the videos you guys posted. i removed the plastic covers and still can't see the switch let alone touch/reach it. i don't want to remove the intake to do this. can i remove the wiper cover somehow to get to the switch? btw, this is still the original switch that is bad at 120K miles.
thanks a lot.
thanks a lot.
Instructor
Joined: Jan 2011
Posts: 176
Likes: 1
From: Buffalo Grove Illinois
It is very tight back there. Many people cant get to it as is so they CUT a hole in the wiper tray. I wouldnt hack my car like that. I removed the intake manifold and replaced the gaskets while I had it off. It is an easy job to do.
Racer
Joined: May 2005
Posts: 283
Likes: 16
Bottom line it is all in what you feel comfortable doing. The folks here give excellent advice and can help you through any repair you need to do. Some are professional car guys and others are hobbyists. It is all in what you are comfortable in doing and how much you want to stretch in you mechanical comfort zone.
Good Luck
Le Mans Master
Joined: Feb 2012
Posts: 6,644
Likes: 479
From: OK
Cutting an access hole under the wiper cowl cover... doesn't have to be a "hack" job, it can be done neatly and then sealed up nicely... the wiper cowling covers it anyway and unless you REALLY look for it you'll never know it was ever done...whatever method you use to or have the OPS replaced it's a GOOD idea to RELOCATE... it LIVES in a VERY Hostile environment and will live longer in a new cooler location.