Re: 4 Banger with Temperature Problems.. Please Help
You said there was foam. This can cause the coolant to be pushed out the overflow pipe. Do the IR temperature test but also drain the coolant and flush with clear water. Then fill with plain water and see if it still over heats. Sometimes a combination of antifreeze and other chemicals or just some kinds of antifreeze can cause foaming. If it still foams with clear water then there is some sort of gas entering the cooling system which is causing foam to form, most likely exhaust gas.
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