Oil Filter boss plugs???

[SCClockDr]

I notice there are 2 plugs in the top of the oil filter boss. Are they both pre, or post filter, or one each? If the latter which is pre-filter? TIA

 

[rbattelle]

If I recall the diagram correctly, both of those plugs are PRE filter.



-Ryan

 

[nickleinonen]

If I recall the diagram correctly, both of those plugs are PRE filter.



-Ryan

took a peak at the service manual and the diagram there looks like they are POST filter???

 

[rbattelle]

took a peak at the service manual and the diagram there looks like they are POST filter???

Nick's right, I'm wrong. I checked the diagram when I got home. Both plugs are POST filter.



-Ryan

 

[Vaughn MacKenzie]

That would make it a good place to check oil pressure, but not the most ideal for oil temp unless the oil circulates through there before the oil cooler.



Vaughn

 

[nickleinonen]

the oil has passed through the cooler before it hits the filter pad... i still think that would be a good location for the oil temp... i don't really need to see what it is in the sump, but what the temp is before hitting the bearings. . with the engine working, it'll be hotter than the water temp, and with it not working so hard, about even with water temp.



when i decide on what oil temp & new oil press. gauge i am getting, i will put the temp in the top of the pad and figure out the fittings to put the press. where the factory switch is...

 

[SCClockDr]

Thanks for the replies everyone. I was looking for an oil sampling port that I could install a needle valve into to pull an oil sample.



What page in the service manual (Cummins or MOPAR) is this diagram?

Thanks!

George

 

[nickleinonen]

page 9-339 in the 2003 factory service manual

page 9-290 in the 2004 factory service manual



in both the diagram is identical

 

[rbattelle]

when i decide on what oil temp & new oil press. gauge i am getting, i will put the temp in the top of the pad and figure out the fittings to put the press. where the factory switch is...

And I reckon I'll be doing exactly the same thing as soon as you figure out the fittings.



-Ryan

 

[Bertram65]

Center port works well for oil temp, you would be surprised how hot the oil is, I have seen it as high as 230.