kenny schmitt
NAXJA Forum User
- Location
- US
1990 4.0 that belongs to a friend dumped coolant from the overflow and overheated. i figured could be bad cap but its a closed system or something and no cap. the prev owner did water pump and prob thermostat to try to stop a bad squealing sound. i looked at the truck today and half filled the overflow and started it. the upper hose never got hard but the overflow did have coolant coming out. not much but didn't let the temp get past 1/3 of the gauge. where to start not used to these older xj's any ideas?