I have a 2000 with a 3.1
I have replaced the radiator, water pump. But still loosing coolant. I think it comming out the overflow because of the marks on the hood flung by alternator.
The temp runs between 3/8 to just over half in city traffic. The LIM gasket was changed before I got it.
The stock waterpump had a huge impeller, The after market has alot smaller impeller?
At what temp should the fan come on ?
It runs like a top. at stop lights it hard to tell it's even running.
No water in the oil. was tested at overflow with head gasket tester.
The temp guage works....has been to 3/4 when waterpump went out.
Was pressure tested...no leaks

 

Help!!!!!:d

 

Cap pressure tested?

 

You can get a pump that replaces the radiator cap, pressure the system up, then look for leaks.

 

Looks like OP said that he already did that man

 

Thanks for recognizing me as a human being. I missed his last sentence. I'd suggest since it has been pressure tested, and he feels it is the overflow, I think if he filled the overflow up with water too see if it has a leak. Since the pump/tester I was refering too takes out the overflow nipple.