tech@WS6store

iTrader: (2)

People that question the o ring are usually trying to dive too deep to find a problem.
The o ring matches the pickup tube and normally is matched by color or thickness of the o ring. If you had the wrong one itll show bubbles in oil likely.

It happens most of the time for no reason thats why we like to shim our ported pumps either rpmspeed or gm ls6.

Cumminsday

The pump came from rpmspeed. Are you John?

tech@WS6store

iTrader: (2)

It depends on when the pump was ordered. I do now shim them all but only since the last 10 pumps. Previous the customer had to ask.

Cumminsday

I ordered November 2018, if that helps. What part do you shim?

G Atsma

The relief spring, so cracking pressure is higher

Cumminsday

Do you think the relief is the problem on mine? My next task was going to be to remove and open up the oil pump.

G Atsma

No, because the oil relief piston only relieves when max pressure is achieved. It puts a lid on the max pressure. At idle speed, the piston is not even being moved. you have a different issue.

tech@WS6store

iTrader: (2)

Thats ideally why i like to plug the dod ports either drill and tap or use the lingenfelter rivet tool.

Had some local guys with a melling 10295 and still showed low til they did that. Then it picked up decent to about 30 hot idle.

00pooterSS

iTrader: (40)

Have you seen the TSP tap in plugs for the AFM towers? Just saw them the other day in a video, they're pretty sweet.

tech@WS6store

iTrader: (2)

I have and have installed them. They are just the right height also but some dont like that. Some prefer drilling and tapping or using the lingenfelter rivet setup. Any way is ok.

Cumminsday

What size shim do you usually install under the spring in the pump? If I pull the pump, I might as well shim it.

tech@WS6store

iTrader: (2)

Usually 2 small machine screw washers.

warriorpluto

iTrader: (2)

Do you sell the Texas speed kit to plug the ports? I don't see it in their site. I may be looking in the wrong place

tech@WS6store

iTrader: (2)

They only use those for gen5 lt engines. They dont have them separate though.

tjoyce81

iTrader: (1)

I am having the same problem. I changed the sending unit and small filter under it, oil pump pick up o-ring, and the oil pump itself - and the electronic gauge acted the same every time....
I did ALL of this assuming that the gauge reading in my dash was giving me the right reading.
I now have hooked up a mechanical gauge to the system and it reads 50psi cold, and 45psi hot. When I rev it up, the pressure goes to 55psi and holds there....ALL this from the mechanical gauge, (probably should have done that long ago)
I believe the electronic gauge in the dash is screwed up....Any opinions on that?
Did you verify the ACTUAL oil pressure with a mechanical gauge?

Cumminsday

I did verify with a mechanical gauge, it reads identical to the dash and my scan tool. My next step is pull the lifter valley cover, inspect, and plug the AFM lifter towers while I'm in there. Plugs are on their way. If that doesn't fix it, then............

tjoyce81

iTrader: (1)

In reading your posts closer - I noticed that you were unaware of the different O-rings that go on the oil pick up tube at the pump.
Make sure you have the right one in there. In 2007 the O-ring is usually the thicker one. red/orange or green.. NOT black or blue..That O-ring is also sized for the tube NOT the pump.

In looking at the way the the oil flows from the pump to the towers, I am not sure that plugging them will help you, because the AFM/DOD is already deleted - so the
solenoids do not allow oil to flow through them...

The oil pump pressure can be changed by either shimming the spring under the relief plunger - or putting a stiffer spring in there. VERY easily done - you only need an 8mm allen wrench to access the spring and plunger..

Also, fyi, the factory service manual says that the minimum oil pressure for your engine is 6psi @ 1000rpm... 18psi @ 2000rpm... and 24psi @ 4000rpm...
They bare the minimum numbers - so if you have 12 @ idle (usually less than 1000rpm) you may be ok with the pressure you have?

Hope you fix it....good luck...

G Atsma

On the oil tube O-ring, if there is a groove rolled in the tube near the end that goes in the pump, it uses the thicker O-ring. No groove, the thinner one.

Cumminsday

I pulled the pump and pickup tube, I did have the wrong o-ring on the tube. Replaced with the red one. Inspected pump internals and relief. Reassembled and no change in oil pressure. The only thing left to do is plug the towers. I shouldn't have to plug the towers, but I'm out of ideas on what could be causing the issue. Others have seen issues with the towers, plus it can't hurt to plug them. I realize that I'm above minimum oil pressure recommendations, but it was much better before. I'd like to have the pressure where it was before. Thanks to everyone for their input.

owenco

Hey, I know this is kind of an old thread, but you know how they hardly ever end with the OP resolving the issue. Did you fix the low oil pressure problem?? I have a very similar issue. Deleted afm with standard lifters, new cam, standard volume oil pump/oring, etc, and pressure is right around 15psi hot. I used the oring style valley plate cover, so I'm curious if the plugs fixed your issue, or if you just accepted it as the new normal?