Oil pressure
Thread Starter
Instructor
Joined: Jul 2011
Posts: 197
Likes: 21
Oil pressure
My oil pressure reads 80. Years ago the dealer told my wife that was fine. Now someone told me that I need to check the DIC and if it was 130, the sender was bad. Of course it's bad. Scary thinking it hasn't worked all that time. (Car runs great)
I found a thread about changing it and that's going to be my project in the next week.
Anyways, I got to talking to another Vette guy and he said that there are two sensors. One goes to both the gauge and the DIC. The other goes to "Check Guages" light. He said that if that light is not on, I have pressure. The only time that light comes on is when the fuel goes to zero. (Another issue)
Can anyone confirm that the "Check Guages" is an idiot light for oil pressure.
I found a thread about changing it and that's going to be my project in the next week.
Anyways, I got to talking to another Vette guy and he said that there are two sensors. One goes to both the gauge and the DIC. The other goes to "Check Guages" light. He said that if that light is not on, I have pressure. The only time that light comes on is when the fuel goes to zero. (Another issue)
Can anyone confirm that the "Check Guages" is an idiot light for oil pressure.
Melting Slicks
Joined: Mar 2012
Posts: 2,800
Likes: 456
From: USA
Yes there is a low oil pressure warning assoiciated with the check gauges light.
Check Gages Warning Light
This light will come on
briefly when you are
starting the engine. If the
light comes on and stays on
while you are driving, check
your gages to see if they are
in the warning areas.
This light can come on for the following reasons:
Low Oil Pressure
High Coolant Temperature
High or Low Battery Voltage
This is from the owners manual.
Good luck with your repair.
Check Gages Warning Light
This light will come on
briefly when you are
starting the engine. If the
light comes on and stays on
while you are driving, check
your gages to see if they are
in the warning areas.
This light can come on for the following reasons:
Low Oil Pressure
High Coolant Temperature
High or Low Battery Voltage
This is from the owners manual.
Good luck with your repair.
Thread Starter
Instructor
Joined: Jul 2011
Posts: 197
Likes: 21
That doesn't make much sense. If there's only one sensor and it usually fails to the pegged max, then the idiot light is of no value. (In another thread I was told it fails that way) Three indicators off of one sensor? Why have redundancy, but not really?
Thread Starter
Instructor
Joined: Jul 2011
Posts: 197
Likes: 21
There aren't two sensors, just the one that you need to replace that's gone bad. Replace it and both the oil pressure gauge itself and the readout on the DIC will go back to showing the actual oil pressure. And the "Check Gauges" light would come on if you actually had an oil pressure problem (which it appears you don't) among other problems.
Pro
Joined: Jul 2010
Posts: 590
Likes: 57
From: Aurora Colorado
I read this thread and I am not following the logic. This thread seemed to suggest that there can be a sensor failure--and it would be possible for the driver to know the actual oil pressure.
If the oil pressure sensor failed and shows a incorrect high pressure reading--there is no way for the driver to know the actual oil pressure. And if there is damaging actual low pressure--the engine will be destroyed .
The "check gauge" light has no importance when the single oil pressure sensor fails with a false high pressure indication. The "check gauge" light will not prevent engine damage or indicate a low oil pressure when there is actual low pressure when the sensor has failed.
If the oil pressure sensor failed and shows a incorrect high pressure reading--there is no way for the driver to know the actual oil pressure. And if there is damaging actual low pressure--the engine will be destroyed .
The "check gauge" light has no importance when the single oil pressure sensor fails with a false high pressure indication. The "check gauge" light will not prevent engine damage or indicate a low oil pressure when there is actual low pressure when the sensor has failed.
Last edited by phoneman91; Feb 27, 2016 at 09:49 PM.
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Thread Starter
Instructor
Joined: Jul 2011
Posts: 197
Likes: 21
Yea, three indicators are stupid if there's only one sensor. And a sensor that fails "high" is really stupid. There are a lot of vehicals that only have one sensor, but they usually don't fail "high". It appears this one does most of the time.
Drifting
Joined: Dec 2011
Posts: 1,439
Likes: 23
From: mesa az
Remove your intake manifold and replace the sensor. Very easy job. If I can do it you can. Replace the gaskets if you haven't had it off because they are cheap and probably need it. Clean your intake manifold of the oil it has inside of it and install a oil can. Just did this last year.
Pro
Joined: Dec 2009
Posts: 631
Likes: 104
From: Yardley Pa
Remove your intake manifold and replace the sensor. Very easy job. If I can do it you can. Replace the gaskets if you haven't had it off because they are cheap and probably need it. Clean your intake manifold of the oil it has inside of it and install a oil can. Just did this last year.
Drifting
Joined: Dec 2011
Posts: 1,439
Likes: 23
From: mesa az
I bought AC Delco which is aluminum. The first time I went under the wiper overhang and took the short cut. Trouble is I didn't tighten down enough and leaked oil bad. So I did it the recommended way and removed the intake manifold. Very easy. Take your time and clean everything while it exposed.
Thread Starter
Instructor
Joined: Jul 2011
Posts: 197
Likes: 21
Well guys, I replaced the sensor about two months ago and would you believe it, it failed again. It's reading 80 psi again. It should be easier this time because I cut a hole in the tray, but I'm still not very happy about this. Where do you sappose is the best place to buy one?
Thread Starter
Instructor
Joined: Jul 2011
Posts: 197
Likes: 21
Well I replaced it again. Started it up and moved it to a parking spot at my house. (the Guage worked fine) It sat for about two weeks. Yesterday, I drove on a 400 mile trip. Shortly into the trip, the Guage went to 80 psi. This is really getting old.
This sensor was from Advanced Auto and it was brass. If I tighten it too much, will that make it fail?
This sensor was from Advanced Auto and it was brass. If I tighten it too much, will that make it fail?
Drifting
Joined: Dec 2011
Posts: 1,439
Likes: 23
From: mesa az
[QUOTE=helirich;1592158743]Well I replaced it again. Started it up and moved it to a parking spot at my house. (the Guage worked fine) It sat for about two weeks. Yesterday, I drove on a 400 mile trip. Shortly into the trip, the Guage went to 80 psi. This is really getting old.
This sensor was from Advanced Auto and it was brass. If I tighten it too much, will that make it fail?[/QUOTE
For what it's worth man I sympathize for you regarding the sensor failing again.
This sensor was from Advanced Auto and it was brass. If I tighten it too much, will that make it fail?[/QUOTE
For what it's worth man I sympathize for you regarding the sensor failing again.
Instructor
Joined: Apr 2015
Posts: 197
Likes: 6
The sensor you bought from Advance that is brass is made by BWD and is probably part #S4202P. BWD also makes another sensor part #S4202 (without the P on the end) that also fits the C5. The reason I mention both sensors is because the warranty on #S4202P is only 1 year/12K miles while the warranty on #S4202 is 3 years/36K miles, which tells me the #S4202 is a better quality sensor than #S4202P. If you can't get the #S4202 from Advance (and it doesn't look like it based on their website), I know O'Reilley carries them (and they're only a few bucks more than the #S4202P which they also carry).
I can confirm what Smoken said above. My FSM says the torque spec is 15 lb ft.
I can confirm what Smoken said above. My FSM says the torque spec is 15 lb ft.
Sounds like he might have already got the S4202 when he went to O'Reilley the first time. Just thought I'd chip in and ask, what would you recommend he do if he comes back and says he already tried the S4202 with out the P at the end?