98 4.6 coolant question.
08-10-2015, 11:07 PM
#1
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98 4.6 coolant question.
I have a 98 f150 with a 4.6 that I can not keep coolant in. Don't see anything dripping when idling. Heater core is bypassed for now. It always seems to have alot of pressure in the coolant jug no matter how much I burp it. I've noticed if I drive 60mph or doesn't leak out to fast but if I drive 70mph it leaks out pretty fast. I have to add water every day no matter how much I drive it.
08-11-2015, 06:27 AM
#2
Senior Member
Could be a head gasket allowing exhaust gases to pressurize the system. Do a hydrocarbon test on the coolant to test for exhaust gases.