I just changed the heater core on my 1981 Trans Am about a month ago...NOT FUN. To start, I removed all of the AC ducts under dash. I also removed the "bubble" vent cover off the kick panel, and the complete glove box including the door. Zip tied alot of wiring and cables out of the way. There is one bolt that is virtually impossible to reach without removing the fender, it is also a pain trying to get to the lower heater hose. My solution: I did what Pontiac should have done from the factory...I cut a small access hole in the fender well. It's about 3.5 X 3.5 inches square. I was able to remove the heater hose clamp, and the bolt through the heater box. Just big enough to get my hand through, sand and file the sharp edges. As a repair...I went to a salvage yard, bought another fender well, laid the cut out portion over the spot, cut it out about 4 inches all the way around...made two tabs on one side and a tab on the other. Then I cut slits in the fender well on the car to put the tabs into, and drilled a hole in the other tab, and screwed this access cover back on. It's not factory original, and I'm sure some people would have a problem with it...but they may have never replaced a heater core before. Or, yes, take the fender and hood off. The actually removal and reinstallation of the heater core box is very time consuming, and if you have little or no patience....PAY SOMEONE TO DO IT.
The most important part of the operation is the installation, be very carefull with the new heater core outlets, they will bend and possibly split very easily.
There was a lot of careful twisting and manuvering done under the dash. This may not be the right way, but it worked for me.
Replacement of the heater core on a 1993 Mazda Protege is going to first require the removal of the entire dashboard. Once that is removed then the heater control box will need to be removed and disassembled in order to get access to the heater core inside.
The blower motor on all 70-81 Firebirds and T/As is located behind the passenger side fender. Complete pain to change. The best way is to pull the hood and the passenger side fender and inner fender well. Some people simply cut a hole in the inner fender well to get to the fan and heater core. Suggestion.....if you do either of these procedures, change out the heater core while you are in there. Save you from doing it again when it finally goes.
On what?
To change the heater control bulb on a Citroën Berlingo, first, disconnect the vehicle's battery for safety. Remove the dashboard trim surrounding the heater controls, which may require a flathead screwdriver or plastic trim removal tool. Once the trim is off, locate the bulb holder at the back of the heater control panel, twist it counterclockwise to remove it, and replace the old bulb with a new one. Finally, reassemble the trim and reconnect the battery.
unbolts from the outside on the firewall and then it comes out under the dash, easiest to cut a doorway in inner fender well to get to the bolts.
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.
does a water heater require a ground wire?
removal of heater hose from engine to fire wall
Pigging is process of removal of Deposited coke in the heater tubes
With Ac It is Under Front right Fender
It is located under the passenger side of the dashboard behind the glovebox. Non A/C cars are easier to change than A/C cars because the heater box is smaller, but it's still the same process. Drain the radiator, disconnect the heater hoses, then remove the bolts/nuts that hold the heater box to the firewall. You will probably need to remove the fender and fender well to get to all of the bolts. It's a real PITA to get to them all... Good luck!
(6) Removal and Installation of Cowl Heater Core Assembly (60, 62 & 7S Left Side) 1. Drain cooling system. 2. Remove left front fender dust shield. 3. Remove four fender to body mounting screws and block fender out from body about one or two inches to permit access to heater attaching screws. 4. Remove rubber heater-unit-to-blower-unit duct under fender. 5. Remove heater unit to blower unit support bracket. 6. Remove control cables at control assembly on instrument panel. Refer to Note 3. 7. Remove three screws and remove kick pad heater grille. 8. Remove kick pad. 9. Remove two kick pad heater duct to heater unit screws. 10. Remove two defroster hose clamps and hoses at heater case. 11. Remove clamp and remove heater air hose at heater case. 12. Disconnect water hoses from txmom of heater assembly. 13. Remove four hearer-unit-to-cowl retaining screws. 14. Remove heater unit. b. Inslallation 1. To install cowl heater core assembly, reverse above procedure.