- Location
- Muskogee, OK
'91, 4.0, aw4, np231.
My Jeep runs too cold, usually on the second strike of the gauge which is around 150-160°. This has been confirmed with a IR thermometer so I'm pretty sure my gauge is functioning properly. I've been through 3 thermostats and am currently running a mopar 195° purchased from the dealership. The other types I've tried were a stant from rock auto and a cheapo murphey from O'rielleys. They all worked the same. I just replaced the water pump last night with no change in behavior whatsoever. The radiator is a 3 core of some sort, not sure what brand but it is not stock. I'm running a 50/50 mix of coolant right now for the winter.
Is it possible to install a thermostat upside down? That is what one of my coworkers was suggesting.
I am not sure what else to try besides a piece of card board in front of the radiator. I believe this is killing my gas mileage cause it is around 12mpg and it used to be much better before this problem. BTW, the Jeep runs colder in the winter. Any suggestions are appreciated.
My Jeep runs too cold, usually on the second strike of the gauge which is around 150-160°. This has been confirmed with a IR thermometer so I'm pretty sure my gauge is functioning properly. I've been through 3 thermostats and am currently running a mopar 195° purchased from the dealership. The other types I've tried were a stant from rock auto and a cheapo murphey from O'rielleys. They all worked the same. I just replaced the water pump last night with no change in behavior whatsoever. The radiator is a 3 core of some sort, not sure what brand but it is not stock. I'm running a 50/50 mix of coolant right now for the winter.
Is it possible to install a thermostat upside down? That is what one of my coworkers was suggesting.
I am not sure what else to try besides a piece of card board in front of the radiator. I believe this is killing my gas mileage cause it is around 12mpg and it used to be much better before this problem. BTW, the Jeep runs colder in the winter. Any suggestions are appreciated.