My explorer isn't getting any heat and when i do cut it on the coolant leaks out from the bottom like someone cut the sink on, then the truck starts to steam up from under the hood back towards the window. I have to open the radiator valve to release the pressure. what could it be i think its the heater core but im not sure help me please
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Re: no heat and leaks antifreeze
You're on the right track. grab a flash light and crawl under your truck to look for trails left from coolant leaks. if this is happening only when you turn your heater on, but the engine runs fine and there's no leak any other time, it's either you're heater core, or just the hoses going to it. look above the exhaust pipes, all the steam rolling out from under the hood is the coolant hittling hot exhaust or the hot engine.
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Good job of tying the heater to the antifreeze overflow.
This is a guess. Replace the radiator cap and the hose connecting the radiator to the coolant reservoir. Then fill the radiator, engine, and heater hoses completely with antifreeze solution.
When the engine heats up, the coolant expands. Excess coolant is directed to the reservoir. When the engine cools, coolant is supposed to be sucked back into the coolant system. If either the radiator cap or the overflow hose has a tiny leak, air will be sucked in instead of the antifreeze returning
IF YOU GOT TOO MUCH WATER IN COOLANT SYSTEM AND DONT HAVE 50 / 50 MIXTURE OF ANTIFREEZE AND WATER. WATER WILL EVAPORATE BOIL AWAY.CHECK FOR COOLANT LEAKS LOOK AT TOP AND BOTTOM RADIATOR HOSES LEAKS, CHECK FOR COOLANT LEAKS AROUND BOTH RADIATOR CONTAINER AND RADIATOR CORES LEAKING. CHECK WATER PUMP WEEP HOLE. IF LEAKING WATER NEED REPLACING, CHECK ENGINE CRANKCASE ANTIFREEZE WILL LEAK IN CRANK CASE OR LEAK IN THE INTAKE GASKET COOLANT WILL BURN WITH FUEL.MANY THINGS WILL CAUSE COOLANT LOST.
Check the cooling fan motor and of course the fluid level. If the temp is changing thru the heater it could just be low on coolant , leaking from ? Two wheel drive have an elecrtic cooling fan only, make sure its spinning up when temp is 3/4. If not its probably the fan motor. Can be checked with a test light .
That series of malibu is notorious for bad head and intake gaskets which leak antifreeze into the lubrication and combustion areas. I fixed the girlfriend's by getting a motor out of a junkyard, paying someone to break it down and replace all gaskets then install it. Lasted a year and then we began again. Good luck. Google it if you do not believe me.
Do the windows (windshield) fog up for about 2 seconds if you switch the defroster on too? Sounds like you have a leak in the heater core. It's a small radiator located in the heater box inside the cabin of the vehicle. The blower fan blows through it to heat the cabin. If it's leaking or has a hole in it, what you are smelling is antifreeze. You can try a good radiator sealant and if that doesn't work. You'll have to change the heater core. Explorers aren't fun.