Im considering taking the head off my van to see how bad the head is its got water in oil to a creamy white and too much on the stick she gets too hot and oil try's to boil out the top cap I have just installed a new gas set up and.new 3 core radiator installed myself there's about 400 000 on the clock . It's a good old x Telstra van I think it's the second donk I have changed a head once on a 186 years ago what do you think the rings may be stuffed ?