Just curious what everyone is seeing for oil pressure. I'm seeing 60-70 idle cold engine, 25-40 idle warm engine and 50-60 cruising down the highway.

I always do engine oil pressure tests at the oil sender. You can see if the dash gauge is reading the same as the test gauge. The oil pressure sender is usually at a point in an oil galley that's after the oil filter and before the main crank journals. The pressure gauge I use goes to 300 PSI because I use it on auto transmissions also. I think if you find one that goes to 100 PSI you'll be fine.

Hmmmm, where is this valve at?

I beleive its the valve located on the side of the oil filter housing. T

Today at 75* outside on a hot engine at 60 mph i have 68 lbs oil pressure, the manual gauge is on top of the filter. I too can see 100+ on the manual gauge when cold. I dont understand this pre set 65lb thing. Does someone have a picture of it ? Is it the pressure relief spring in the filter housing ? Because i was told to shim out that spring for more pressure.

Yes that is where it is. Did you shim it out?

Don't want to get to carried away with pressure you don't want to start popping the oil nozzles out of the block...

I used a 60 thousand shim. It has been that way for years. Every time i pull the valve cover the rocker cups are full of oil,so it is pumping good. However you have me concerened about the bypass. In the cummins manual it tells to check the spring pressure.Ok ,on edit i think i figured this puppy out. So my oil is not being filtered after 65psi. I now wonder if i can change it to 75. Question about the marine engine filter housing. I have seen pictures of the marine filter housing it seems not to have a bypass valve at all. Is that true ?

Why shim it? Cummins put it there for a reason, unless your running a LOT more power than stock I would assume that OEM oil pressure is good.

I think i fall into that category .

My $200 OE pressure sender is crap. My truck reads 2/3 full sweep of oil pressure, even with the engine off... :doh:Unhook the sender, and the gauge goes to zero, so I know it's a failed/stuck sender.

Yeap sounds like a bad sender...

My $200 OE pressure sender is crap. My truck reads 2/3 full sweep of oil pressure, even with the engine off... Unhook the sender, and the gauge goes to zero, so I know it's a failed/stuck sender.

I was changing parts a wile ago. I just may have one. It is used but works. If i have it do you want it ? It is free.

I was changing parts a wile ago. I just may have one. It is used but works. If i have it do you want it ? It is free.

Hellzyeah! Lol. If its for free, then its for me! Sent from my rooted EVO's tiny keyboard with my opposable thumbs...

I will look this morning. If i have it it's yours.

--- Update to the previous post...

I found the part.Mopar part # 1-05012991aa. Check it please. It thats what you need pm me your address.

that's the one I'll PM you. Thanks!