I have had this car back six times. the first time i took it in i had no heat. they flushed out the system. still no heat took back again they found a crack in the reservoir tank replaced that. it was leaking out around the reservoir tank before they put the new one on and still leaks. well then i took it back again no heat. they put a thermostadt on then they found a crack in the radiator replaced radiator. i went to pick it up today and no heat and still leaking around reservoir tank. Just so you know I am not getting charged for anything but the flush and I am at wits end. please help me
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Temp gauge fluctuates? From around 200 degrees and up, then back down? This is an air pocket. First check the reservoir for leaks, then check the hose from the reservoir to the radiator for leaks and if it is kinked. No kinks in this hose is important. When I purge these systems, I drive it till hot, then turn sharp circles both ways. In a parking lot. This seems to help purge the heater core. Then refill as necessary. I do this with any car that has the 3.4 or 3.1 engine.
Did you have red antifreeze prior to the flushing? Ford engines are generally aluminium and should be using blue antifreeze which is suitable for aluminium engine blocks! I think the antifreeze is reacting to the aluminium.....re flush and use blue!
Check your heater hoses..If one is hot and the other is cool or luke warm,,then the heater core is clogged..I know its hard to get to ,,but if its clogged sometimes you can take the hoses off,,and run a garden hose through it and flush it out..
Check ur RADiATOR if its CLOGGED!
Checking it by means of TOUCHiNG the BOTTOM PART after running ur engine for 30 min.
If the bottom part is not the same as the TOP part of the radiator, it means its CLOGGED and u need to bring to ur nearest garage mechanic to FLUSH OUT or internally clean the radiator assembly!
Check also the RADiATOR FAN if it works in a certain temperature!
If can't see any leakage, as u say, 'cause of high temperature of ur engine, ur COOLANT goes to the coolant reservoir and overflowing it every time ur engine HEATS UP!
Check also the RADiATOR CAP, if the seals are damage or the spring is all corroded up, water heats up and goes thru ur reservoir and doesn't come back to ur radiator when engine colds down, radiator caps FAULT!
Hope that might help u out!
It could be the heater control but more than likely there is air in the system somewhere - Have you replaced a thermostat or water pump recently? Try this: Raise the front end of the car up about 2 feet (make sure you "block" the rear tires) - remove the cap from the coolant reservoir - start the car and allow it to run for a bit, (not sure if really necessary, but I always turn the heat on with the blower on high) - if bubbles appear in the reservoir then your problem should be solved and you should have heat -wait until the bubbles stop, top off reservoir put cap back on - if still no heat, you could have a blockage somewhere which requires flushing of the system.
good likely hood that your oil cooler is leaking oil into coolant this is something you want to replace as soon as possible. you will have to flush your coolant system several times to get as much of the oil out as possible. if you wait you will have severe temp issues as well as not heat due to a clogged heater core. and that is very hard to replace. To flush system hook garden hose to the larger hose of the coolant reservoir get car up to temp. keep idle up a little. get large bucket from the smaller hose that goes into the reservoir hook small hose to it and let it empty into bucket keep hose running thru all the time. before that though replace oil cooler. also replace coolant reservoir as well. or oil will contaminate new coolant. good luck