Oil pump change after AFM/DOD delete?
02-22-2018, 09:00 PM
#12
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I’ve ordered a Melling 10295 (standard volume high pressure). Probably just leave the red spring in there as it comes and see where the oil pressure is at when the it takes it’s first breath
02-28-2022, 09:13 AM
#16
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Hey guys, so before I slap the engine back in my truck, I just wanted to double check my oil pump choice. I did a AFM/DOD delete along with a BTR Truck Stage 2 cam. Engine is a Gen4 Iron block LMG 5.3, I replaced my oil pump with a new GM stock one, #12586665, which is a common pump used in the LS1, LS2, LS6 and so on. Now should I have used a better pump such as Melling 10295 (Standard Volume, High Pressure) or Melling 10296 (High Volume, High Pressure) ? If it matters my shift RPMs will be set at 6k and Max would be 6200RPM. Before I removed the engine at hot idle I had around 22-25PSI and anything above 1800 RPM I had 45-50PSI.
Would this be a bearing clearance issue?
Any suggestions?
02-28-2022, 01:31 PM
#17
On The Tree
My three would be, thrust retainer plate, barbell, and or O-ring.
02-28-2022, 01:46 PM
#18
TECH Apprentice
I just rebuilt my 2010 5.3 engine. I replaced the oil pump with the Melling high volume pump. I made sure my pickup tube O-ring was a tight fit. My oil pressure is good until the engine reaches operating temperature, then it drops. Idle when cold is 45-50 PSI. Idle when at operating temperature (210') is15-20PSI. I have a check engine light that will come on occasion indicating low oil pressure. I put a delete kit on it and plugged the hole where the relief valve went. Driving down the road the oil pressure will vary from 25PSI -60PSI depending on RPM's. At 55 it's about 30-40 PSI. The screen and gauge have been verified with a mechanical gauge.
Would this be a bearing clearance issue?
Any suggestions?
Would this be a bearing clearance issue?
Any suggestions?
03-28-2022, 04:20 PM
#19
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I just rebuilt my 2010 5.3 engine. I replaced the oil pump with the Melling high volume pump. I made sure my pickup tube O-ring was a tight fit. My oil pressure is good until the engine reaches operating temperature, then it drops. Idle when cold is 45-50 PSI. Idle when at operating temperature (210') is15-20PSI. I have a check engine light that will come on occasion indicating low oil pressure. I put a delete kit on it and plugged the hole where the relief valve went. Driving down the road the oil pressure will vary from 25PSI -60PSI depending on RPM's. At 55 it's about 30-40 PSI. The screen and gauge have been verified with a mechanical gauge.
Would this be a bearing clearance issue?
Any suggestions?
Would this be a bearing clearance issue?
Any suggestions?
Amsoil took back my unused filters and refunded them, but didn't reimburse me for the oil I used. They also didn't reimburse me for the 3 different vehicles I had to change filters on (All with the same issue) after they said they would. I was a bit ticked about that. Just FYI ...