Mitsubishi galant 2000 heater core replacement

we could assume that the heater core is plugged and needs replaced

check thermostat and replace if deffective. easy way to check is start car after a few minutes check upper and lower hose for equal temp. if upper is much cooler than lower hose change thermostat

Check the water pump.. Check the pullys

have you tryed to replace your thermostat? if you have a numbered guage on your dash.... has it been higher than 200? if so,then your problem may be thermostat,or a cooling fan not coming on when the engines reached it's standard operarating temperature. as long as you're not loosing coolant from your radiator,does not point to an engine leak.however,if you notice a leak after driving the vehicle,then,you have an issue. determine where the leaks coming from.leaking freeze out plug,leaking water pump,and the worst! leaking coolant into,or,onto the passengers side front floorboard.{heater core replacement} thank you for choosing fixya.com!

heater core

behind the glove box!
Inspect/Replace If it is necessary to remove the heater assembly, the cooling system must be drained before removing the heater core.
When a heater core leaks, a new heater core is installed or the old one repaired.
Heater Housing

• The heater housing is usually under the dash and must be removed to gain access to the heater core.
• Procedures for replacing the heater core vary with the year, make, and model of car. It threfore necessary to consult the manufacturer's repair manuals for the proper procedure for replacement.

The heater housing is disassembled to get to the heater core.
Heater Core

• Remove the access panels(s) or the split heater/air conditioning case to gain acess to the heater core.
• Remove the heater coolant hoses.
• Remove the cable and/or vacuum control lines (if equipped).
• Remove the heater core securing brackets and/or clamps.
• Lift the core from the case. Do not use force. Take care not to damage the fins of the heater core when removing.
• To reinstall the heater core, reverse the removal steps.

When the heater core leaks and must be repaired or replaced, it is a very difficult and time-consuming job primarily because of the core's location deep within the firewall of the car. For this reason always leak test a replacement heater core before installation.

the ac drain is more than likley stopped up, they tend to get clogged with debri not allowing the condensation from the evap. core to drain properly, thus allowing it to leak into the floorboard.

Your heater core is leaking. I'm guessing that when you turn on the vents for heat or a/c, you are probably getting vapor/steam inside the car. If this is the case, you need to have your heater core replaced.

2002 diamante heater core sits in center of the dashboard just over the on board computer for the car. To access it you need to take out the console between the seats and the entire dashboard to get to it. The only thing wrong with the heater core is the leaking gaskets (about $10 in parts). Mitsubishi knows about the problem and when the dash is taken apart you will see a plastic sheet over the onboard computer to somewhat protect it from the leaking heater core gaskets. So the expense in the repair is in the labor to get it all apart and back together again. The dealers seem to replace entire heater core when they fix this problem. I did just the gaskets and that solved the problem. I have read others who did it themselves only replaced the gaskets and that solved it for them as well. Maybe the dealers think you will feel better replacing a larger part for so much labor.

the heater core lines are under the dash and when it starts leak i will flood the floor board. does the ac shut down even if you are running it on recirculate and on fresh air. it may be the compressor clutch. if that hasn't been replaced yet.