2004 ford explorer
I have a 2004 ford explorer (4.0) liter engine. Almost everytime I drive for about 20 Min.
and stop my coolnt reservoir fills up and starts leaking out the top, and the hose going to
the thermostat is tight to the touch but the truck is not running hot. But i know something
is wrong with the system because thats not normal to drive around then stop and coolant
is leaking out of the reservoir. can you help me?
Sounds like a blown head gasket, compression gasses getting into the cooling system causing high pressures, if you continue to drive it it could blow the heater core and the radiator. Take it to a shop for a block check, that will tell you if it is blown or not.
sounds like a compression leak into the cooling system. plugged radiator is another possibility but shouldn't have started all of a sudden. you need to pressurise the cooling system and check for leakdown. no leakdown ? check the radiator.
I've checked multiple vehicles in my day the old fashion way, by pulling the rad cap to see if it smells like gas, and check the oil dipstick for a white creamy texture. but to me it sounds like u may need to change the thermostat if u haven't already, also the temp gauge sensor. good luck I own a 1995 v6 4x4 with 150k, its a very reliable smooth running vehicle for its age
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