are 4-cyl and 6-cyl temp senders different?

I'm runnin a 4-banger gauge cluster with a 4.0L swap, and the temp gauge always runs extremely hot.

I know it's not overheating. the wire going to the sender is pretty rough though, I think it may just be picking up extra resistance through that wire, but even the 4-cyl gauge is calibrated differently (middle line is 220 Vs 210)

Should be the same, according to NAPA. Also, last time I was at the dealer looking in the FSM for the resistances to test the temp gauge, it didn't list different ohms for the 2.5 or 4.0, they were the same. How did the temp gauge read before the swap? Didn't I see a picture somewhere of the 2.5 running and belching blow-by out of the crankcase vent?

MJmk said:

How did the temp gauge read before the swap? Didn't I see a picture somewhere of the 2.5 running and belching blow-by out of the crankcase vent?

Click to expand...

You've got a good memory

the temp gauge read fine on the 2.5L, and this motor didn't "overheat" before I pulled it from the donor vehicle.

this is what's bugging me. I gotta dig up my svc manual and check the output resistance and see what it's actually reading. maybe a good flush/refill and a new t-stat is in order.

the funny thing is, the system holds pressure just fine, and seems to function normally. fan clutch is good.

hell, maybe I still have air trapped in the system