my 90 xj overheats when i take it wheeling. the motor is completly stock. a guy told me to reroute some tubes to the firwall and get a new overflow tank and stuff? do any of you guys have any pictures for this process and any advice.. tx

 

How hot is it getting? Is the Electric fan working? Is the mechanical fan clutch working? Is the T-stat good?

 

it usually always stays below a quarter all the time till bout a few weeks ago when i went wheelin.. havent really done any of the obvisious things yet.. the electric fan came on and made a loud noise

 

how old is your radiator? when my XJ was running hot I replaced everything, and it still ran hot till I replaced the radiator. I busted a tank off the old one and it was plugged with some kind of silt. runs cool now.

 

yes check the radiator,my 96 over heated also. i replaced the water pump ,belt,thermostat ,fan clutch....still overheated? finally layed down 150$ bought new radiator and installed it .overheating stopped ,then i took the old radiator to the shop i bought it at so the tech could open it up and check the tubes. he found about 40% of the core blocked with sludge. nuff said..... remember to flush your cooling system and change your coolant at least every 2 years.

 

i also found a lot oil in my air filter??