

Should I replace my radiator?
This is Paul. He’s a 2000 XJ, 4.0, 4dr, 4wd, automatic with 260k miles on the original everything (except the brakes, omg don’t ask). He’s a daily driver and a solid team mate. That roof rack will carry anything, I swear (Unistrut from Home Depot).
Some background on the coolant system:
- Somebody ran the orange stuff for years before I got him. I switched to green about 6 years ago.
- That same year, he had a water pump leak on the highway that slowly lowered level until the pump cavitated and turned the system to orange foam.
- That same year (yes), the steel freeze plug on the back of the block let go (thanks Chrysler) and he lost 100% of coolant in the highway. The engine is still rocking.
- I have flushed everything with thermocure once or twice since then. The heater core got solid flow after that. Blows cold now, but I think that’s because of a coolant filter I threw in line after the flushes that can maybe go away now.
- He also has a 180 degree thermostat installed, which is probably not helping the heater output. (Sure enough, my mileage went down when I put that in by the way).
Yet somehow, the radiator doesn’t have any issues. The electric fan is beat to heck and the shrouds are hanging on by a thread. I assume its flow is poor, but it cools just fine. No overheating, even in traffic on a 90+ degree day.
I’m doing some coolant work to swap out the thermostat for a 195. While I’m breaking the system, should I do the radiator? Or leave well enough alone?
And if I do the radiator, which one? They all have reviews saying either they crack in a year or overheat.