New Cast Iron Oil Pump pressure low
03-27-2021, (Subject: New Cast Iron Oil Pump pressure low ) 
Post: #28
RE: New Cast Iron Oil Pump pressure low
(12-13-2020 )alamow Wrote:  Mandy, thanks so much for posting. Information like this is gold dust. Much appreciated.

Cummins put my truck on the dyno. 520hp at the wheels. 35psi at rated HP. So I have an operational engine brake at 2050rpm..... within spec according to Cummins.

I'll try 5mm shim when the Xmas rush stops.

Did you get a chance to shim it? We're in the same area and I noticed lower pressure on a couple of our crate engines and a recently rebuilt engine. Was in Hedland this week and saw the pressure on the rebuilt engine go down to 105kpa at idle when oil temp was around 110 degrees, comes back up to a more acceptable level once oil cools down a bit though
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03-27-2021, (Subject: New Cast Iron Oil Pump pressure low ) 
Post: #29
RE: New Cast Iron Oil Pump pressure low
(03-27-2021 )Tanker93 Wrote:  ...
engine go down to 105kpa at idle when oil temp was around 110 degrees
...


15 psi is TOO LOW for an isx at idle ... SOMETHING IS [email protected]!. Should be above 18 psi, more like 20-22 psi.


User's Signature: ->: What I post is just my own thoughts and Opinions! --- I AM Full Of S__T!.
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03-27-2021, (Subject: New Cast Iron Oil Pump pressure low ) 
Post: #30
RE: New Cast Iron Oil Pump pressure low
(03-27-2021 )VNL64T Wrote:  Hi all.
Reduce noise ..
Do not place gaskets underneath the pump to the engine block ...
Use Loctite 518

"New pump does not use shims to set gear lash."
"Lubricating oil pumps with threaded regulator plugs do not use shims to adjust gear lash."

mm in
0.08 MIN 0.003
0.57 MAX 0.022

Be sure to check the gear clearance !!

I installed without gaskets using Loctite 518, the noise disappeared ..

I have had just as many people say they had to install the shims to reduce the oil pump gear=-train noise... so just because it worked one way for you, does not mean it is the best solution for someone else.

The biggest problem is that the gears seem to be cut differently. Adding or removing some clearance might help, but get it too close (below 0.008" or so lash), and it will accelerate gear wear.


User's Signature: ->: What I post is just my own thoughts and Opinions! --- I AM Full Of S__T!.
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03-28-2021, (Subject: New Cast Iron Oil Pump pressure low ) 
Post: #31
RE: New Cast Iron Oil Pump pressure low
(03-27-2021 )Tanker93 Wrote:  
(12-13-2020 )alamow Wrote:  Mandy, thanks so much for posting. Information like this is gold dust. Much appreciated.

Cummins put my truck on the dyno. 520hp at the wheels. 35psi at rated HP. So I have an operational engine brake at 2050rpm..... within spec according to Cummins.

I'll try 5mm shim when the Xmas rush stops.

Did you get a chance to shim it? We're in the same area and I noticed lower pressure on a couple of our crate engines and a recently rebuilt engine. Was in Hedland this week and saw the pressure on the rebuilt engine go down to 105kpa at idle when oil temp was around 110 degrees, comes back up to a more acceptable level once oil cools down a bit though


No. The pipe to the exhaust pressure sensor was blocked with soot resulting in high water and oil temp. Once the blockage was removed the oil pressure stabilized at 32-34psi regardless of the oil temp. The engine runs much cooler and recovers from a hard pull so much quicker. From water temp of 100c to 87c takes 200m rolling off a hill. This has the added benefit of a cool engine when pulling up. Previously high idle and Horton was required to increase oil pressure from 15psi to 18 psi at idle.

More recently the pressure differential sensor was found to be leaking at the front O ring. This caused all sorts of EGR/VGT issues at idle.
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 Thanks given by: Rawze
03-28-2021, (Subject: New Cast Iron Oil Pump pressure low ) 
Post: #32
RE: New Cast Iron Oil Pump pressure low
(03-28-2021 )alamow Wrote:  No. The pipe to the exhaust pressure sensor was blocked with soot resulting in high water and oil temp.

Curious how this was found?


User's Signature: Warranty??? Yeah right, I am the warranty!!!
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03-28-2021, (Subject: New Cast Iron Oil Pump pressure low ) 
Post: #33
RE: New Cast Iron Oil Pump pressure low
(03-28-2021 )tree98 Wrote:  
(03-28-2021 )alamow Wrote:  No. The pipe to the exhaust pressure sensor was blocked with soot resulting in high water and oil temp.

Curious how this was found?

High EGT at low throttle, 40 psi Boost, 1 litre/1km fuel consumption. EGR Tune up
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 Thanks given by: Rawze , tree98 , hookliftpete
03-29-2021, (Subject: New Cast Iron Oil Pump pressure low ) 
Post: #34
RE: New Cast Iron Oil Pump pressure low
Wow. Wealth of info in this thread. I was lucky enough to pick up an old style pump before I tore mine down so hopefully I put in the 8 dimes tomorrow and it'll be ok.

Curious, what exactly wears in these pumps? I'm replacing mine solely as a function of mileage and proactive maintenance, is a used pump that was still functioning fine worth more than a core or rebuild able?


User's Signature: 2010 T2000, CM871, 13spd, 930k, tanker yanker
Overhauled @ 927k
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