Proper DoD delete oil pump

[03GMCYukonXL]

So I did the DoD delete and fixed all my post DoD delete issues except for I'm geting really low oil pressure. I did replace the sensor AND the screen with a brand new one. But I'm getting like 10 PSI or less at idle and about 35 PSI while driving. Maybe 40 PSI when I get on it.

I'm not sure if it's really that low as I don't really hear any lifter noises at idle, however I've read more than a few times that I need to get the melling 10296 pump. Which sucks because I just put the thing back together and have been driving it lol. I really don't like dropping the front diff just go get the stinking oil pan off just to get the pump out. Anyways, does this forum agree with the recommended pump change?

 

[03GMCYukonXL]

And I'm reading that I actually need the melling 10295.

Oil pump Melling 10295 vs 10296, 295, 296 - LS1TECH - Camaro and Firebird Forum Discussion

Generation IV Internal Engine - Oil pump Melling 10295 vs 10296, 295, 296 - Had to rebuild my L76 in my Pontiac G8 GT due to lifter failure. Just a basic job. Re hone and put new bearings and rings in it plus DOD delete and a pretty aggressive cam. Im trying to save cost where I can so Im...

ls1tech.com

 

[iamdub]

So I did the DoD delete and fixed all my post DoD delete issues except for I'm geting really low oil pressure. I did replace the sensor AND the screen with a brand new one. But I'm getting like 10 PSI or less at idle and about 35 PSI while driving. Maybe 40 PSI when I get on it.

I'm not sure if it's really that low as I don't really hear any lifter noises at idle, however I've read more than a few times that I need to get the melling 10296 pump. Which sucks because I just put the thing back together and have been driving it lol. I really don't like dropping the front diff just go get the stinking oil pan off just to get the pump out. Anyways, does this forum agree with the recommended pump change?

What pump did you put in it? The stock pump for the AFM engines is a high volume pump. I used a Melling M295HV for mine. Since I capped off everything AFM-related, essentially making it like a Gen3 engine, a standard volume/standard pressure pump would've been fine. But I wanted more volume since it had 200K and I was gonna run it hard. Still, I don't see a standard volume pump causing that much of a loss in oil pressure. You might wanna try a non-AFM valley cover, GM #12598832.

 

[03GMCYukonXL]

What pump did you put in it? The stock pump for the AFM engines is a high volume pump. I used a Melling M295HV for mine. Since I capped off everything AFM-related, essentially making it like a Gen3 engine, a standard volume/standard pressure pump would've been fine. But I wanted more volume since it had 200K and I was gonna run it hard. Still, I don't see a standard volume pump causing that much of a loss in oil pressure. You might wanna try a non-AFM valley cover, GM #12598832.

I reused the factory oil pump. I have the non afm valley cover. It came with my AMS racing kit.

 

[randeez]

what was your oil pressure before?
did you plug the towers in the valley or just relying on the cover to seal?

 

[iamdub]

I reused the factory oil pump. I have the non afm valley cover. It came with my AMS racing kit.

I assumed you reused the VLOM cuz you said you replaced the screen when you replaced the sensor. I never knew you could use the screen in the non-AFM valley cover. It wouldn't go in on mine and I used a stock valley cover just like what looks to be in that AMS kit. My thoughts are that either the sensor isn't accurately reading the pressure or the gauge isn't responding accurately or you have an internal leak. Did you replace the pickup tube O-ring?

 

[j91z28d1]

the ls oiling system pod caat I was listening to said the vvt using more oil volume than the afm lifters. but byond that.. did you happen to peak at the cam bearings while it was apart? ls seem to always have cam bearing wear, but it's never really an issue.

 

[03GMCYukonXL]

I assumed you reused the VLOM cuz you said you replaced the screen when you replaced the sensor. I never knew you could use the screen in the non-AFM valley cover. It wouldn't go in on mine and I used a stock valley cover just like what looks to be in that AMS kit. My thoughts are that either the sensor isn't accurately reading the pressure or the gauge isn't responding accurately or you have an internal leak. Did you replace the pickup tube

I put the oil pressure sensor with the screen in the back of the non DoD valley cover. It's a new sensor and a new screen. I was told I'd hear lifter tick if it was actually low but I do not hear that. Also, I know I am burning 0 oil because there is no smoke, and yes, I replaced the 0 ring with the orange one. I'll also add, that it's only when it's at operating Temps. It's fine until it warms up.

 

[03GMCYukonXL]

This is at idle in neutral

This is at idle in drive

This is while driving

 

[iamdub]

Like Randeez asked- what was your oil pressure like before?

I don't believe that pressure, if it is accurate, is low enough to cause collapsed lifters. It's plenty when driving. I'd confirm the pressure with a mechanical gauge before diving deeper.

 

[Marky Dissod]

Didn't the V4 mode engine come with some kind of oil pressure management valve?
Wondering if that has something to do with your slightly low but not worrisome pressures?

 

[03GMCYukonXL]

Didn't the V4 mode engine come with some kind of oil pressure management valve?
Wondering if that has something to do with your slightly low but not worrisome pressures?

In the oil pan I believe. And that isn't worrisome? Because it sure worries the hell out of me lol. Before, I had closer to 40 at idle and 55 while driving but I replaced the sensor at the same time I did the DoD/AFM delete.

I'd like to hear more than one person say that isn't worrisome before I decide not to worry lol.
Also, maybe I got a ****** sensor? I don't even remember where I got it.

 

[03GMCYukonXL]

what was your oil pressure before?
did you plug the towers in the valley or just relying on the cover to seal?

Sorry I missed this reply. I just used the valley cover with the seals.

 

[03GMCYukonXL]

I'm trying this tomorrow I believe

 

[Marky Dissod]

I THINK what I'm saying, is that V4 mode engines also have two oil pressure modes.
I THINK V4 mode does not require quite as much oil pressure as V8 mode. Does that make sense?
I THINK it does - not as many lifters need pressurizing in V4 mode as in V8 mode.

Maybe your oil pressure is stuck in V4 mode?
That'd be enough oil pressure (but ONLY) IFF you're driving conservatively.
However, the more your engine works / plays HARD, the more you want greater oil pressure.

 

[j91z28d1]

the oil is used to release pins in the lifters thru a 2nd oil port in them to go into v4 mode. the oil dead heads into the lifter. it's not much volume of oil either way, the afm oil issues are when seals start leaking internally at the vlom o'rings wasting oil. but technically in 8 cyl mode afm lifters don't get anymore oil than standard non afm lifters because the vlom solenoids are closed and not supplying oil to the release port.

the vvt uses oil as hydraulic fluid to constantly move the cam in relation to the cam gear.. it's said to use quite a bit of oil volume for that..

the factory service limits for oil pressure are crazy low. they are on this site somewhere, but if memory serves, it's like 7psi hot idle in gear. you're fine.

if you don't remember where you got the sensor, it's worth grabbing a new one without a screen from a dealer or a trusted source. but never Amazon, I'm convinced that "acdelco" sensor is a fake, or old bad stock. something ain't right with it.

and then read your pressure with a scanner. the dash gauges are not very precise

 

[swathdiver]

Iron block motors use the Melling 295 or 12710303 oil pump. This pump uses a red 43 psi spring.

Aluminum block motors use the Melling 365 or 12710304 oil pump. This pump uses a yellow 33 psi spring. This one pumps 1/3 more oil per revolution.

Now having said that, old and worn out parts are the likely culprit. Could be the pump itself, the VLOM tower seals, or the pressure relief in the oil pan. Worse than that would be cam bearings, rod and main bearings.

Gen IV non-AFM engines do not use the filter under the oil pressure sensor.

 

[Foggy]

Just remember that high volume does not equal high pressure
The dod with vvt engines need both to operate all the "stuff"
Getting rid of dod by itself does not really change the oil requirement especially
if you still have VVT
I may have missed your exact engine and year (didn't see it in signature)

 

[donjetman]

In the oil pan I believe. And that isn't worrisome? Because it sure worries the hell out of me

Doesn't look worrisome to me.
The oil pressures in the pics are exactly what the my 07 6.2 has for pressures. I changed the oil pump pickup tube o-ring 5+ yrs and 63k miles ago at 130k.

I'd like to hear more than one person say that isn't worrisome before I decide not to worry lol.
Also, maybe I got a ****** sensor? I don't even remember where I got it.

Send it

 

[donjetman]

In the oil pan I believe.

AFM relief valve is in the oil pan. Needs the have a shield put on it per the TSB:
https://f01.justanswer.com/ebrock63...il+Consumption,+MIL+ON,+Engine+Runs+Rough.pdf