Check the plug going into the thermostat housing on the front of the engine. May be broken or loose from the accident or the repair. Could also be the temp sensor. After a hit up front you might be chasing a few issues like that as you start to drive it again. It's worth it rather than a car payment though. Nice to see another XJ saved from the yard.
A nation that "forgets" it's defenders, Will itself be "forgotten". Semper fi
91 XJ 4.0 5spd 5.5 on 32's, flat flares, sand camo'd. "Battle Wagon"
01 XJ 'Up Country' 3.5 on 29's former fire vehicle. Bright red. "Fire Wagon"