No oil pressure

[VIKING_MECHANIC]

Alright, so last weekend I was driving my C1500 around running some errands when some stuff happened to the truck. First; I noticed my oil pressure gauge was stuck at 20, even with engine off or cycling the key. I didn't give it much thought since I know the gauge motors are known to fail.

I stopped to get gas and when I started the truck when I was done, I heard lifter chatter from the passenger side of the engine. I was able to baby the truck home. I took off the pass side valve cover and let the engine run for a few minutes. All the valves/rocker/pushrods were moving, however there was no oil coming out ANY of the pushrods.


Today, I decided to install a oil gauge to verify if the one on the cluster had failed. I ran the capillary tube that came with the gauge from the port on the engine where the oil sender is and ran it into the dash where I had the gauge. After about two minutes of the engine running, no oil was flowing into the tube from the engine.

At this point, I'm not sure where to go.

 

[618 Syndicate]

Did you check the dipstick?
Before I ran a motor that I suspected was low on or out of oil, I believe I'd check and see...

 

[VIKING_MECHANIC]

Did you check the dipstick?
Before I ran a motor that I suspected was low on or out of oil, I believe I'd check and see...

Yes, had plenty on it. Had to drain about a quart to add some Marvel Mystery oil for the lifter clatter, so I was keeping an careful eye on the oil level.

 

[618 Syndicate]

Ok good. You hadn't mentioned it so I had to ask.

 

[frito-bandito]

Try an oil pump and see if that fixes it.

 

[VIKING_MECHANIC]

Try an oil pump and see if that fixes it.

I guess I'll be taking the oil pan off for the THIRD time

 

[Teddygraham]

Do you have pressure at the oil filter?

 

[VIKING_MECHANIC]

Try an oil pump and see if that fixes it.

I bought a new one and I'm going to take off the old one and see if the gears are stripped or something.

 

[VIKING_MECHANIC]

Do you have pressure at the oil filter?

How do I test for that?

 

[Teddygraham]

How do I test for that?

They make a gauge that threads In place of the oil filter.

Or you could take the filter off of it, put a deep pan under it and have a buddy start it up. If you don’t have any flow within 3 seconds then you have a problem.

It’s not the best method but would work. Obviously somone needs to man the key and shut it off pretty damn quick.


If you have a lot of flow, try a new oil filter (process of elimination)