2350 Jake Solenoid

[Bigballercarhauler]

Replaced 2 injectors today and decided to fire it up before putting the rocker cover on to check for oil leaks. Ever since the truck was overhauled my oil pressure has been off bout 3-5psi from what I’m used to. Noticed while truck was running the front Jake solenoid is leaking pretty good. The rear maybe half as bad. I’m assuming they shouldn’t be leaking correct? Truck has been having intermittent Jake issues lately as well. They kinda stutter from time to time and or don’t fully engage. Would this be enough for the 3-5 psi difference.

[Rawze]

could be...

this somewhat related info may also help...
http://rawze.com/forums/showthread.php?t...783#pid783

3-5 psi is significant...

== Was all OEM parts used ?. or aftermarket?.

== did someone verify ALL part#'s for each bearing as they came out of the bottom end?... cummins is known for using a single random alt. size bearings on the bottom end on occasion.,. then someone assuming all are the same, and are standard part#'s .. and then putting engine back together only to find out there is lees oil pressures.. and eventually ending up with a spun bearing or destroyed crank later on.
more related info: http://rawze.com/forums/showthread.php?t...0#pid81250

[Bigballercarhauler]

(02-23-2025 )Rawze Wrote:  could be...

this somewhat related info may also help...
http://rawze.com/forums/showthread.php?t...783#pid783

3-5 psi is significant...

== Was all OEM parts used ?. or aftermarket?.

== did someone verify ALL part#'s for each bearing as they came out of the bottom end?... cummins is known for using a single random alt. size bearings on the bottom end on occasion.,. then someone assuming all are the same, and are standard part#'s .. and then putting engine back together only to find out there is lees oil pressures.. and eventually ending up with a spun bearing or destroyed crank later on.
more related info: http://rawze.com/forums/showthread.php?t...0#pid81250

The bottom end is all Cummins. I asked them if they verified the bearings they said yes they did

I’m getting 20 psi at idle (725) and 35-36 going down the road at 1500. I noticed when I originally got it back it would sometimes fluctuate back to normal and run 38-40 where I’m used to seeing it pre overhaul. Are the orings causing the leak the ones on the bottom of the solenoid inside the manifold? Per quickserve it says to replace solenoid if orings are damaged. Are the orings unserviceable?

[Rawze]

(02-23-2025 )Bigballercarhauler Wrote:  ...
I’m getting 20 psi at idle (725) and 35-36 going down the road at 1500. ...

that is not unusually low pressures,. Seems quite normal to me.

[Bigballercarhauler]

(02-24-2025 )Rawze Wrote:  

(02-23-2025 )Bigballercarhauler Wrote:  ...
I’m getting 20 psi at idle (725) and 35-36 going down the road at 1500. ...

that is not unusually low pressures,. Seems quite normal to me.

I was getting 38-39 prior with oil temp north of 220. This is 210 oil temp numbers. Not crazy off but feels off to me driving it everyday. That’s why I was curious if those Jakes leaking would be enough to make that difference. I’m going to re oring them this weekend and see if I can get away without replacing the solenoid

[Hop along cassidy]

Did you ever figure it out been struggling with the same issues

[Bigballercarhauler]

(02-24-2025 )Hop along cassidy Wrote:  Did you ever figure it out been struggling with the same issues

What issue exactly? The Jakes leaking?