Place a pan under the van and disconnect the heater intake and outlet hoses. Quickly remove and plug the hoses and support them in an upright position. Drain the coolant from the heater core into the pan.
When draining engine coolant, keep in mind that cats and dogs are attracted to ethylene glycol antifreeze and could drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantity. Always drain coolant into a sealable container. Coolant should be reused unless it is contaminated or is several years old.
Remove the heater distributor duct-to-case attaching screws and the duct-to-engine cover screw. Remove the duct.
Remove the engine cover.
Remove all the instrument panel attaching screws.
Carefully lower the steering column. Raise and support the right side of the instrument panel. Refer to for further details.
Remove the defroster duct-to-case attaching screws and the two screws attaching the distributor to the heater case.
Disconnect the temperature door cable. Carefully fold the cable back and out of the way.
Remove the three nuts from the engine compartment side of the distributor case and the screw from the passenger compartment side.
Remove the heater case and core assembly.
Remove the core retaining straps and remove the core.
Remove the steering column-to-instrument panel bolts. Lower the column carefully.
Remove the upper and lower instrument panel attaching screws. Remove the radio support bracket screw.
Raise and support the right side of the instrument panel.
Remove the lower right instrument panel bracket.
Remove the vacuum actuator from the kick panel.
Disconnect the temperature cable and vacuum hoses at the case. Remove the heater distributor duct from over the engine hump.
Remove the two defroster duct-to-firewall attaching screws below the windshield.
Under the hood, disconnect and plug the heater hoses at the firewall.
Remove the three nuts and one screw (inside) holding the heater case to the firewall.
Remove the case from the van. Remove the gasket for access to the screws holding the case together. Remove the temperature cable support bracket. Remove the screws and separate the case. Remove the heater core.
it is located under the dashboard against the firewall of the passenger seat. i recomend buying a repair manual from your local auto parts store before attempting as it requires draining, flushing, refilling and bleeding the cooling system as well as removing many other componets like the entire dashboard and thermostat
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Apr 18, 2014 - Uploaded by DerrickTheMechanic
How to change them out.And what they ... 2005 Chevy Impala3.8Liter ... Heater core information, coolant leak, bypass,replacement, hoses, etc.
Jun 19, 2013 - Uploaded by klowny1969
How To Change A Heater Core - Part 2 of 2. klowny1969 ...Impala . Caprice . Nova . Biscayne . Corvette . Denali . Landcruiser . ... Chevrolet 1500 * 2500 Truck * Heater Core Replacement * Gasoline * 1997 - Duration: 11:59.
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Ensure the engine and water is cold before startignthis project to eprevent scalding. This is not an easy fix as it takes a lot of patience. First step is to trace the hot water lines from the radiator and engine back to the firewall (wall below the windshield). The two silver (aluminum) pipes are the ends of the heater coil (core). I would recommend going to the auto parts store and puchase the replacement part first so you know what you are working with and have an idea of the sive of the entire element. Second is to locate the heater core black box which should be located in the area under the dash nearest the passeger side. There are several screws that must be removed to separate the black box to expose the heating element. Sometimes is it hard to get the box cover out and due to it being made of hard plastic, it is easy to break. Once you get to the heater core, the are a couple of holders that keep the core tight inside the box. remove them, disconnect the hoses (inside the engine compartment) and work the heater core out. when installation the new heater core, be very careful as to not damage the pipes that connect to the hose. Good luck
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.
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.
You can remove both hoses from the core and put them together using a short length of copper plumbing pipe. No problem to engine from this it flows through just like its going to core( engine can't tell the difference)