5.3 Tick/Knock?

[JPVortex]

Another update here folks and not a good one.

Valve cover gaskets are in no problem. First day back to driving it, and I’ve lost 10psi of oil pressure today. Was 35-40psi at idle before and now I’m lucky to see 30psi.

I have a feeling the pickup tube oring is going bad.

 

[JPVortex]

Also to be noted, it seems to gain like 5-10psi when I have the front of the truck nosedived down.

 

[viven44]

I’m lucky to see 30psi

That is plenty of oil pressure in my opinion. When you rev it are you over 50PSI ?

Didn't you say your engine has 200K miles ? If so you are in good shape for the miles.

 

[JPVortex]

That is plenty of oil pressure in my opinion. When you rev it are you over 50PSI ?

Didn't you say your engine has 200K miles ? If so you are in good shape for the miles.

When I rev im nowhere near 50psi. At 2k rpm I have 35psi, and 4k rpm I have like 40-50psi.

No where near where I think it should. I had an 05 tahoe with 160k at 4k rpm it had like 70-75psi of pressure, at idle 45psi and 2k rpm around 50-60psi.

 

[JPVortex]

That is plenty of oil pressure in my opinion. When you rev it are you over 50PSI ?

Didn't you say your engine has 200K miles ? If so you are in good shape for the miles.

And also Im very concerned because, the pressure literally dropped 15psi today from what is has been at. So somethings wrong.

 

[viven44]

And also Im very concerned because, the pressure literally dropped 15psi today from what is has been at. So somethings wrong.

I would suspect the gauge as well on such a drastic drop.... what you have there I'm sure is no perfect gauge... on all my old trucks I have a mechanical oil pressure gauge installed.

If you are worried about that o-ring, by all means drop that pan and change it. No big deal.

 

[JPVortex]

I would suspect the gauge as well on such a drastic drop.... what you have there I'm sure is no perfect gauge... on all my old trucks I have a mechanical oil pressure gauge installed.

If you are worried about that o-ring, by all means drop that pan and change it. No big deal.

Yeah definitely going to replace it. The pan gasket is seeping anyways. Should just be an afternoon job. Not my first rodeo with that stupid job.

Lowering the front diff is the most annoying part lol.

 

[JPVortex]

Alright folks I’ve made up my mind, I do not feel like busting my ass if I don’t need to. So I’m going to put a mechanical gauge on it. Will probably put it near the oil pump, there should be a plug there

 

[JPVortex]

Oil pressure test kit I ordered with the right M16 x 1.5 adapter doesn't come till tomorrow but I did get the sending unit off today, and boy it was BAD.

Thing was oil soaked and has been leaking all down the rear of the engine. Really does look like a rear main leak from below... lol.

Hoping the sending unit is the problem! Hoping that all the oil destroyed it, but I guess I'll find out tomorrow with a mechanical gauge!

Forgot to look, but I dont think 02s have the screen for the sending unit, right?

 

[viven44]

Sounds good. Interested to see what you find. Take pics of where you tap into for the mechanical gauge, etc..... and not sure if your plan is to have a gauge permanently, if so, I'd definitely use this instead of the cheap plastic tubing that comes with the mechanical gauge

https://www.amazon.com/gp/product/B00UZ9HC2U/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1