After reading thru some of the tech. folder. I noticed that the oil cooler has a bypass that is in the oil filter housing and is set at 25 psi... Is it possible that some of the 6.0's over time have weakened say to 20 psi or lower and is allowing hot oil to around the cooler instead of forcing it thru, allowing our deltas to get a larger spread?
It would make sense for all those that have changed oil coolers,done flushes etc, all in trying to reach the under 5* spread.. Is there a way to test the pressure and adjust or replace the bypass?
Any techs that have run into this, and any thoughts on the probability?

 

Interesting,

 

I have been looking for a part number on this(oil cooler bypass valve). Anybody happen to run across it? Could this potentially be a problem for some?

 

Well after all it is a spring and they age and get weak. Maybe when someone does an oil cooler
if the price is not way out there they should just replace the by-pass assembly.
It really depends on cost.

Sean

 

Great. Something new to worry about.

 

If the real problem with the oil coolers is the size of the coolant passages and them plugging due to casting sand/coolant precipitate, then having an oil bypass bypass really wouldn't hurt eot #'s, maybe improve them.

Ideally, having a coolant bypass thru the oil cooler would be the right answer, allowing enough cooler to reach the egr and not allowing heat failures as typical today.
Not sure there's room, nor that would solve the problem?

 

I think that they would have to really rework a few things.
That being said it could be done. If it were done then a PID for
by-pass should be added because you won't get any oil cooling
and it will get hot fast and cause other problems.
Out of the frying pan and into the fire! Type problems.

Sean

 

I'm wondering if you're refering to the oil filter bypass that's part of the standpipe that will allow for filter bypass if the filter clogs??

 

Page 22: Lubrication System

Page 25: Lubrication System

Josh

 

It looks like it is held in by the two torx screws that locks the standpipe in place. Its brass with a spring. I guess I am wondering if when it is open it bypasses the oil cooler? Is it possible for it to be open all the time and not sending all the oil through the cooler?

 

Josh,
Thanks, I must have missed page 22. I assumed the filter was pre cooler.

 

Ahhh yes. I had forgotten that little feature (can't get those pic's at work sometimes). I've seen more than one of those that have grooves worn into them and IIRC it is a replaceable part but don't know that clogging of the oil side of the cooler has ever been a problem and I THINK that is a differential pressure bypass.

 

I figured it was serviceable but can't seem to find a part number. I'm not really worried about a plugged oil cooler, i just wonder if this spring gets weak or no longer functions and let's oil bypass the cooler all the time. Because of the size, I wonder if it would even matter if it was bypassing