I have replaced the heater unit twice. And it still leaks. I put stop leak in and it stops leaking until I move the temputer control. I need to remove the heater core. But the factory manual doesn't show how. Help NEEDED!
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undo the both heater hoses at the engine fire wall
turn the heater control on
apply a garden hose at one of the hoses and flush through
do it both ways
Two things to consider
stop leak should only work at the area of the leak and circulate normally with the coolant so there should not be a blockage
second point is , if the heater core is blocked then flushing will hot clear it and it may need a new core
It is known that some stop leaks affect the coolant control tap of the heater so it may be that control unit that is the problem and not the core so keep that in mind before replacing the core
That sounds like the coolant level is low. If it is not the use of "stop leak" has probably caused a partial clog which restricts the flow of water unless the vehicle is turning higher RPMS. While sitting still raise the RPMS to about 2000 and see if the heater blows hot air to see if the above mentioned problems are fact.
LOOK FOR BLOWN WINDOW CIRCUIT BREAKER.YOU HAVE A SHORT IN WINDOW SWITCH OR BAD WINDOW ELECTRIC MOTOR.YOUR HEAT PROBLEM IS A STOPPED UP HEATER CORES.THE STOP LEAK STOP ITS HEAT.THE STOP LEAK HAS STOPPED OR PLUGGED YOUR HEATER CORE SO COOLANT CANT PASS THROUGH IT.YOU GOING HAVE TO FIX RADIATOR LEAK AND REPLACE HEATER CORE TO GET HEAT AGAIN.
The stop leak have restricted the coolant flow to your heater core. You can try flushing out the Stop leak with Preston Radiator flush or replace the heater core. Once Cooling system flushed out, replace thermostat, radiator cap and repair coolant leak. Good luck and hope this helps, and Note: Common Black kitchen Pepper does great as a radiator stop leak without leaving any residue and can be cleaned out of the system with water and not coolant flush. Two table spoon is more then enough to stop a small leak. Good luck and keep me posted friend.
If you have to use stop leak drain out some coolant and remove the upper rad hose and poor it down there. IF you put it in the reservoir it will sit there and stop the return. You will think it is full and your system will be empty.
If you have 4.0 you may have a head gasket leaking. If it is running ok and you are loosing coolant contact me back and I will tell you a good fix that works
Your auto is definitely loosing coolant and will overheat. Check your thermostat, hoses, belts, radiator cap and water pump. If you do not fix the leak or coolant circulation problem you can destroy your engine. The smell inside can be being picked up from the outside vent or it could be your heater core inside the ventillation area leaking (which could be your coolant leak).. If that is the case you will need to replace the heater core.