Ive replaced the entire cooling system and it still overheats. No evidence of water in oil or head gasket failure. Wat next
Country: United StatesMake: JeepModel: Cherokee ChiefYear: 1988Engine: 4.0 L. 6cycilder
Replaced entire cooling system
Name is XXXX XXX i will assist you the best i can, please Only accept if you are happy with my answer.You said you replaced the entire cooling system, so this means we can count out any blockage in the radiator ,bad water pump , and thermostats sticking , if these have all been replaced and are all good then i suggest you have the system checked for co2 in the water / coolant . nNot having oil in the coolant or coolant in the oil does not mean you have a good headgasket .What has most likely happened in your case is the gasket cylinder ring has blown to one of the coolant channels ,when this happens co2 gets into the coolant system and overheats the engine , you can see signs when you have the radiator cap off the radiator and run the engine , when you run the engine the following could happens and is a sign of a bad head gasket ,1 coolant will be forced out the rad neck or you will see bubbles coming out the rad neck., but the best way to check this is with a combustion leak test kit .Or take a drive down to AutoZone and they will do this test for you.Click here for further information .Please remember to only rate my answer when you are 100% satisfied. IF you feel the need to click either "Helped a little" or "I expected more", please stop and reply to me via the CONTINUE CONVERSATION button with the issue you have. I will be happy to continue further and do everything I can to provide you with the service you seek.Kind regards Greg.