It take a special tool to release the hose connector. I went to O'Rielly and they show me the Dorman Quick Disconnect replacement part ($6.29) and the Disconnect tool set ($19.99). It took the 3/4" disconnect tool to release the broken hose connector on my GMC truck. Snap on the 3/4" disconnect tool onto the heater core tube, then slide the tool into hose connector to release the dog ears inside the connector. Then pull the connector off. It took me about 30 second to remove the disconnect once I had the connect tools.
The heater core is contained in the plastic/fiberglass housing assembly fastened to the engine side of the firewall. Unplug the wires from the fan motor on the firewall and remove the Phillips screws fastening the plastic housing to the firewall. Remove the heater hoses from the core inlet and outlet and tuck them out of the way. You may have to reposition some brake lines and cut a couple of wiring harness plastic ties. You may also have to remove the lines from the fuel pump to the carburetor if they interfere. You may need to temporarily remove the rocker arm cover. Pull the plastic housing away from the firewall and you will see the heater core inside the housing.
-remove front seats-remove steering column-remove entire dash-remove heater hoses from engine side of firewall/bulkhead-remove A/C hoses from engine side of firewall/bulkhead-remove nuts holding heater / A/C box (on engine side of firewall/bulkhead)-remove heater / A/C box from cab side of firewall/bulkhead-remove top of heater / A/C box.-replace heater core
Remove the passenger side fender and wheel well. Remove the blower motor wire. Remove the heater hoses. remove the nuts holding the heater box to the firewall. Remove the heater box from the firewall take out the heater core revese this process to replace all removed parts.
first you will have to remove your heater hoses going to your motor to the firewall take them off at the firewall, then there is a big box on your firewall, there is a bunch of screws holding it on remove them you heater core will be inside it.
Nope, unfortunately you have to remove the housing and separate both halves.
The heater core is on the passanger side, located behind the bower motor housing on the firewall. If the car doesn't have AC it is not a difficult project. Remove the heater hoses from the firewall and then remove the screws that attach the cover to the firewall. The heater core rests inside.
The heater plenum chamber is a big black plastic box behind the dash/instrument panel. There are bolts on both sides of the firewall which secure the plenum chamber to the interior firewall. Remove the nuts attached to the firewall from the inside the truck and the nuts attached to the firewall under the hood. I just did this today; if you have any questions shoot me an email: fzrspirit AT hotmail DOT com
Remove the glove-box door. Behind that is the heater core cover on the interior, passenger side of the firewall. Remove that cover and there is the heater core. Open the hood and look where the heater hoses enter the front right passenger area of the exterior side of the firewall. Disconnect the two heater hose clamps and you can then remove the heater core.
After you remove the hoses from the core, remove the nuts and bolts that secure the heater case to the firewall in the engine bay. Inside the cab you will have to remove the glove box assembly for clearance. then disconnect the blower fan wiring. there may be another bolt securing the heater case to the firewall on the inside of the cab. Then you should be able to remove the heater case. You'll have to split the heater case to get to the core.
Remove the firewall. Where the 5/8 inch hoses go into the firewall is where your heater core is located. Lots of bolts and screws.
Remove the glove box and the bottom part of the black plastic box that houses the heater core. Outside, you will need to remove the hoses from the heater core tubes that protrude through the firewall. Hard to do without a very expensive special tool. The best way, if you're sure the heater core is gone, is to cut the tubes just on the outside of the firewall or just inside whichever gives you best access. The hoses are connected to the heater with special clips which makes connection easy but disconnection almost impossible. When removing hoses make sure to mark the hoses (which goes on top) for proper replacement. be sure to use new plastic inserts available at the dealer. Use a little Vaseline or liquid soap to lubricate the rubber rings so as not to damage them and allow them to slip on easily. Cutting the heater tubes will save you a bundle in not buying the special tool.
The heater blower/motor seems to be incased in a plastic housing on the passenger side firewall , right behind the on-board computer. There are 3 screws holding the computer in place and need to be removed, to access the heater/blower motor behind it. The plastic casing needs to be cut with a utility knife to access the blower itself.