My 1993 RR 4.2 always ran dead center of the coolant gauge. I just replaced my water pump, t-stat, and put a new/used radiator in to replace my old turning-to-dust one. Started up, topped up the coolant, opened the cap to the heater lines until coolant came out and then closed everything up. Temp gauge went almost to red (not sure how long it took). Do I just have air in the system? How do you bleed it? Anything to check? Possible bad t-stat even though it's new? Top hose is hot--very hot.

 

A quick test for air in the system is to start the engine, turn on the heater and fan to their highest position and see if the heater will put out good hot air at an idle, if not run the RPM's up to around 2000, now is it hot?
Mike

 

heat build-up could induce wearing and fading among engine components which best explains the need for it to be controlled and checked.. you can look for qualified service technician to do right diagnostics with your problem..a test also on the air system will be much great to have results..my dad's car as i assumed badly needed for land rover range rover 4.2 radiator as i and my friend technician suspected the damaged ruined the overall combustion process..