jeepxj2007
NAXJA Forum User
- Location
- Michigan
Alright, I have a 89' jeep cherokee with a 94 engine that was switched into it, it has a close cooling system, newer waterpump, a few months ago it overheated on me, i think due to the fact the bottle is cracked and leaked out a lot of the coolant and then it got worse and worse from there, so i shut it off, added coolant before it got up to 260 degrees, and it stayed normal, i thought what the heck might as well replace the thermostat in case it was sticking, so I bought a new 195 degree thermostat, put it in, now since I put it in, at first I thought maybe it was a air bubble, but now it has been over a month of daily driving and it still does it, the very first time you drive it if it is warm or you drive it hard it heats up to problably 210-215ish on the gauge, then drops back down to 150, and after that it slowly builds up to 190ish and then as soon as it gets close to that it drops down very rapidly to 150, it never did it before I replaced the thermostat, and I hate how it warms up past 210, today I didn't pay attention and was really pushing the jeep to see what it would do when i drove it when it was cold, it heated up to 230 ( It was getting close to 5,000 rpms, and this is the first time and only time I ever do it just screwing around) and then it dropped back down to 150, and then didn't heat past 210 after that...so what the heck could cause this?...do you think there is a problem? or is this normal, it never did it before the thermostat, and my moms 00 doesn't do it after I changed her tstat and water pump.