jeepxj06

i have a 2000 cherokee sport 4.0L that i cant seem to get the cooling problems worked out. everytime i check my coolant it is a rusty brown color. I have flushed the system 3 times an it still keeps doing that. It has a new head gasket an 160 degree thermostat in it. Needing some input

Andrew0257

change stat to a 195, flush until it becomes clear use a chemical flush.

Weou09

160tstat(from my experience!!!!!!!!!) equals 100% guaranteed to overheat.

firstime00XJ

Did you ever use a stop leak in it? Or, if you're not the original owner, has it ever had stop leak in it? I just went through this (two days ago) with my Jeep. The PO put stop leak in it and it settled at the bottom of my overflow resevoir and in the radiator. Had the system flushed, and washed out my resevoir, 100% better. Change the t-stat back to OEM specifications, which is 195*, like the previous poster stated.

trampod

Had the same problem,,,had to replace the rad entirely,,core was shot to hell,(thats a sign,,rust ,,even after flush,,,however if you had it in the mudd check the rad fins they are probably clogged!!,,also if you dont have one,,,get an electric fan and wire it to a switch oor constant