Oil pressure issue after afm delete

[Jonathan Santos]

I have a 2008 GMC Sierra 5.3J engine code I ordered a Texas speed delete kit also put a new mailing M295 oil pump new pick up tube o ring when I first start the truck it'll have a little over 55 pounds of oil pressure once I started driving it and it warmed up. It dropped to 20 and slowly kept creeping down. And then it came down close to zero where I could hear the valve making noise.so i turned the truck off for a second restarted it and it was back to showing roughly 20 pounds of oil pressure but then it dropped again slowly any ideas? The only thing I did not change or block off was that pressure relief valve and the oil pan I also used one of those mailing girdles for the pick up tube and only used the top bolt. I didn't put a bolt in the backside. I thought using that mailing girdle that it allows you to only use one bolt. Could that be my issue? It did look like it seated flat.
Thanks for the help this is my first post i did have the ecm tune done to turn off afm.

also the truck has always had good oil pressure previously on readon for afm delete is because a failed lifter and the oil pump oring I used was felpro

Edited November 3, 2024 by Jonathan Santos

[CamGTP]

Did you use a new cam retainer plate with the AFM delete?

[Jonathan Santos]

Yes

[Jonathan Santos]

How do y'all think this Cam bearing looks?

[CamGTP]

Cam bearings always look worn on LS engines with some miles. If the camshaft wasn't all scored up and you can't feel any huge ridges on the bearing, they are fine. Most guys will say if you look at the cam bearings, they will look bad, so just don't look at them and slap the camshaft in there anyway lol.

 

If the cam retainer plate in new and the o-ring and pump are new, then I guess it could be leaking out oil pressure from the VLOM area if you deleted that too. Or maybe the new oil pump or o-ring is bad out of the box.

[Jonathan Santos]

I used the dowels to block the vlom holes the only thing i can think of is the new oil pump because i never had this issue before

[dsr611]

Make sure the oil pump pickup tube is seated in the boss it fits into.  When I redid my 05, I put the PU tube in, tightened the bolt and fired it up when I got everything back together.  Oil pressure never did come up.  Drained the oil, dropped the pan again, and found that the PU tube wasn't fully seated.  Finally got it seated and everything bolted back up and oil pressure was over 40 when I fired it back up

[PerrinRomilly]

On 11/3/2024 at 2:59 PM, Jonathan Santos said:

I have a 2008 GMC Sierra 5.3J engine code I ordered a Texas speed delete kit also put a new mailing M295 oil pump new pick up tube o ring when I first start the truck it'll have a little over 55 pounds of oil pressure once I started driving it and it warmed up. It dropped to 20 and slowly kept creeping down. And then it came down close to zero where I could hear the valve making noise.so i turned the truck off for a second restarted it and it was back to showing roughly 20 pounds of oil pressure but then it dropped again slowly any ideas? The only thing I did not change or block off was that pressure relief valve and the oil pan I also used one of those mailing girdles for the pick up tube and only used the top bolt. I didn't put a bolt in the backside. I thought using that mailing girdle that it allows you to only use one bolt. Could that be my issue? It did look like it seated flat.
Thanks for the help this is my first post i did have the ecm tune done to turn off afm.

also the truck has always had good oil pressure previously on readon for afm delete is because a failed lifter and the oil pump oring I used was felpro






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If the camshaft wasn't all scored up and you can't feel any huge ridges on the bearing, they are fine. Most guys will say if you look at the cam bearings, they will look bad, so just don't look at them and slap the camshaft in there anyway lol.

[CamGTP]

Looks like the account above just copied what I said and pasted it with a few words different. Gotta love bots.

[Jonathan Santos]

So i called texas speed talked to a guy in tech department and he seem pretty certain that my problem is the mounting service for the oil pump is warped told me to put a thin bead of gray silicone on it and let it dry and then torque it down. He seems to think that's what my problem is.anyone ever heard of this thanks again

Edited November 12, 2024 by Jonathan Santos

[Jonathan Santos]

This truck has been driving me crazy