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Oil pressure issue after afm delete

Jonathan Santos
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Jonathan Santos Enthusiast

Jonathan Santos

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Posted (edited)

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 by Jonathan Santos
  • Jonathan Santos changed the title to Oil pressure issue after afm delete
CamGTP Senior Enthusiast

CamGTP

Posted
Posted

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.

dsr611 Senior Enthusiast

dsr611

Posted
Posted

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 New Member

PerrinRomilly

Posted
Posted
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 Senior Enthusiast

CamGTP

Posted
Posted

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

Jonathan Santos Enthusiast

Jonathan Santos

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Posted (edited)

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 by Jonathan Santos

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