Have  jdm ej25 block. Are ej25 oil pans and pick up tubes interchangeable?

No. Pan, pickup, and dipstick must all match.

 

GD

Have several  pans, pickup tubes and dip sticks. How do I determine which ones go together ?

The flat bottom oil pan is the USDM one

The flat bottom oil pan is the USDM one

 

Us cars got those notched pans too.  05+ when they changed the exhaust to wrap around the oil filter???  Always hated that.  still do.

So how do I determine what oil pickup tube to use.

If the pickup doesn't hit the baffles in the pan it will work. They are all the same depth. But you need to match dipstick length to pan. Some pans run the oil level higher.

 

GD

Not sure what bolts to use to fasten  pickup tube and the other piece in picture. Oil pan bolts fit the holes, but don't  remember what the original bolts are.

The baffle plate bolts are the same as the pan bolts - just usually cleaner or at least less rusty and caked with RTV. The two pickup bolts have no screwdriver slots and are slightly longer.

 

GD

The baffle plate bolts are the same as the pan bolts - just usually cleaner or at least less rusty and caked with RTV. The two pickup bolts have no screwdriver slots and are slightly longer.

 

GD

 

yes, also the 2 pickup tube bolts are higher grade.