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The oil light turns on when warmed up?

Tiny
04COLORADOZ714X4
  • MEMBER
  • 2004 CHEVROLET COLORADO
  • 3.5L
  • 5 CYL
  • 4WD
  • AUTOMATIC
  • 359,615 MILES
There are no codes, and the oil is full. I just replaced the oil pressure sensor on the oil filter housing. (Could it be that I bought a bad one?)

I can see. Oil dripping on to the top of camshaft through the oil filler cap.

Hmm.

Thanks,
Aric
The truck listed above is a Z71.
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Thursday, August 17th, 2023 AT 5:28 PM

8 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,901 POSTS
Hi,

As far as the new parts are concerned, if it is doing the same thing, chances are they aren't the issue. What I suggest is this. Get a mechanical gauge from a local parts store. Most times they lend them out to customers. Remove the new pressure sensor and install the one that comes with the mechanical gauge. Minimum pressure at 1200 RPMs should be no lower than 12 psi. See pic below.

Also, make sure the engine oil is clean and full. If it gets contaminated with fuel or coolant, it will thin, drop pressure, and cause engine damage. Additionally, make sure the oil filter on the vehicle is a quality product and specific to this vehicle.

Let me know if that is something you are comfortable performing.

Take care,

Joe

See pic below.
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Thursday, August 17th, 2023 AT 9:33 PM
Tiny
04COLORADOZ714X4
  • MEMBER
  • 26 POSTS
Hello update. Changed BCM, relearned. The codes p0315 and p0117. Changed CPK, changed oil and filter, and changed VVT solenoid. When changing VVT it had one port clogged with aluminum grinds halfway around tube in one groove.
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Thursday, August 24th, 2023 AT 7:05 PM
Tiny
04COLORADOZ714X4
  • MEMBER
  • 26 POSTS
I have not started the truck since changing the VVT. Is that normal? I have a picture if that helps. Do not want to cause any further damage if that is the case.
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Thursday, August 24th, 2023 AT 7:08 PM
Tiny
04COLORADOZ714X4
  • MEMBER
  • 26 POSTS
Also, this motor is a reman, with 50,000 miles.
So they probably just let the original in the head.
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Thursday, August 24th, 2023 AT 7:11 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,901 POSTS
Hi,

No, you shouldn't have metal shavings there. Did you notice any when you changed the engine oil and filter?

Let me know. Also, let me know how it runs now.

Joe
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Thursday, August 24th, 2023 AT 8:13 PM
Tiny
04COLORADOZ714X4
  • MEMBER
  • 26 POSTS
I didn't see any flakes but the oil in the drain pan was pearlescent. I tried to run a magnet through the drain oil, but nothing stuck to it. So, I am assuming that it is pearlescent because the oil has been from the tumbling of all those pieces of aluminum in the VVT?

Although before I addressed the p0315 CPK (change) haven't started yet and p0017 (VVT) cleared code and the oil change and filter. Prior to these changes the truck had like a rough idle and it sounded like the timing chain was rattling on the valve cover or lash pad?
Please any advice would be godly.
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Thursday, August 24th, 2023 AT 8:55 PM
Tiny
04COLORADOZ714X4
  • MEMBER
  • 26 POSTS
I mean when I changed the VVT and cleared the codes. When I started the truck only the p0315 returned. Not the p0017. So really when changing the CPK and the VVT would that take any slack or retard from the timing?
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Thursday, August 24th, 2023 AT 8:57 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,901 POSTS
Hi,

The code indicates the crankshaft position system variation values are not stored in the PCM memory. How many times have you run the vehicle since the repair?

Let me know.

Joe
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Friday, August 25th, 2023 AT 7:07 PM

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