Hi can anyone help please. My range rover p38 4.0 v8 temperature gauge keeps going from normal then shooting to the red. The car engine is not hot I can put my hand on it so engine isnt really hot. I've changed the temperature gauge and sensor. Also changed the radiator both thermostats and expantion tank cap also flushed the system and new coolent put in but still the same problem. I don't know if there is a air lock as there is no bleeder valve. Can anyone shed some light on this for me please or no the best way to bleed the cooling system. The cab heaters do get hot inside someone said something about a heater matrix or something. Any help would be really great full. The car stills pulls strong and goes well no smoke etc and not leaking any coolent but the radiator hose is building up a lot of presure. Thanks
help please temperature issues
- Thread starter mania08
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Do a hydrocarbon sniff test on the coolant.....building pressure is either serious overheat, or combustion gases getting into the system!
From normal to into red is only a matter of 10-15 degC if not a tad more, it is not a linear gauge....
Best way to bleed system is to raise the side of the vehicle with the expansion tank on as much as possible (jack or ramp) to make the tank the highest point of the system, this way the air should rise to the tank.
Lots of coolant, burp the hoses and keep topping up the system....once done, leave to cool over night and re-check the level when cold.
I'd do a sniff test first to rule out combustion gasses in the coolant circuit...if that is clear, the overpressure must be due to overheat!
From normal to into red is only a matter of 10-15 degC if not a tad more, it is not a linear gauge....
Best way to bleed system is to raise the side of the vehicle with the expansion tank on as much as possible (jack or ramp) to make the tank the highest point of the system, this way the air should rise to the tank.
Lots of coolant, burp the hoses and keep topping up the system....once done, leave to cool over night and re-check the level when cold.
I'd do a sniff test first to rule out combustion gasses in the coolant circuit...if that is clear, the overpressure must be due to overheat!
