How Do I Verify Oil Pressure?

[Hubert]

Ok at 6'oclock is is bypass valve. I roughly measured a while back and it opens at 17-19 psi iirc. 1-2 O'clock is oil coming from cooler. The center hole is where filter knipple sends clean oil back to oil gallery.

Not sure where cup plug goes or comes from. Here is diagram of oil system.

If you look at the diagram the drill path straight up from oil pump output. It almost looks like the oil pump MIGHT? feed the oil gallery directly but probably there is plug inline between passages. Oil actually turns towards oil cooler or bypass etc etc.

Not sure what the cup plug does. I was momentarily thinking it might allow a little flow to bypass the filter but then remember oil pressure can't be higher down stream and still have flow down stream.

Back to more thinking.

Sorry tried to upload scanned page of helm manual but can't get size small enough.

[Hubert]

If anyone is interested I uploaded it to photo album

http://www.thedieselpageforums.com/p...0&ppuser=18766

[chevy1988]

Does those engines have a securityvalve in the oilpump as in other engines I've seen so that if the oil gets realy thick (Extreme cold temp sometimes occur here and you dont want to blow the engine then) it will not blow the filter or gaskets in the oilsystem if revved up? Havent yet taken a 6.5-engine appart so much is still unknown to me.

By experience this "ball/spring valve" might get stuck in open possition and engine looses preasure or sometimes even get no preasure at all. The spring has even in som casesbroke and there is nothing holding oil from passing back down the oilpan.

Think I'll eventually get a haynes manual on this engine to, if there is one

Being from sweden, my english might be a bit off sometimes

[DennisG01]

If anyone is interested I uploaded it to photo album

http://www.thedieselpageforums.com/p...0&ppuser=18766

Thank you! It's always good to see things in a picture.

[rhsub]

Yes there is a pressure relief valve in the oil pump, main reason is to stop high oil pressure from blowing up the oil filter when someone starts the engine up and revs it up when its really cold out, 15w40 is like gear oil at -40. The only time I have seen a stuck relief valve is from extreme lack of maintaince or contamination (broken engine pieces) but I have seen 1 or 2 broken springs in my 30+ years in this business, it is not a common problem
Ron