Hi All Im New to this forum and to owning a patrol I have a slight overheating issue with my patrol I have recently replaced the thermostat, water pump lower radiator hose, the radiator is 4 years old coolant at 50% mixture so what happens is when driving for no real reason the temp will rise as high as 110 deg and then will drop back to around 100 deg on some tracks in low range not working really hard and then i get back on the hwy and it will drop back to 82 deg and then jump up to 96deg its all over the shop i don't seem to have any leaks and every thing seems to be in good order I mot sure why it gets so hot and then cool down so its not getting hot all the time. doing my head in.