mxracer624
NAXJA Forum User
- Location
- Hemet ca,
Well I've got a 89 xj 4.0 that started overheating. I would drive it around for a little and then the temp would go to about 215 and then coolant would start boiling out of the res. tank. So I replaced the head gasket and the head was pretty warped so I figured it was that. I got it refinished and pressured tested and everything was good until I put it on and it was still running pretty hot. So I got a new res. tank and that solved the boiling over problem and it kept the temp down pretty good but then the temp started heating up after a few weeks. So after what seemed like a frillion hrs of research on here I decided id try the hd fan clutch. It worked very well so I figured I solved my overheating prob. So I bought a lift and started working on other things. Well the first time taking my jeep out after installing my jeep I noticed it was getting a little hot again but didn't quite "overheat". Well I took it out the next day and sure enough it got to about 220 after about an hr or so of driving. It was high speed not crawling either. So today I Changed the water pump. Started it up drove it to the end of my street which is about a 30 second drive and the jeep was already at 220.. is that even possible? From completely cold to 220 in 30 seconds? The only other thing I can think about replacing is the radiator. I took the thermostat out completely just until I figure everything out so its not that. I also wired my efan to a switch so I know its coming on. I thought maybe it was the guage so I tried using a laser thermometer but I'm not quite sure where to point it. I pointed it at the thermostat housing and it read like 170 while the jeeps gauge said 210ish but idk how close the tstat housing temp is to the actual temp. Does anyone have any ideas for me? Or does anyone know where I can measure the temp from with the laser thermometer? Thanks!