Question about 1999 Chevrolet Silverado 1500

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Heater core inlet snapped off in hose

I can't get the remaining inlet off of the heater core? it turns, but won't pull, won't push and turn off, I have no clue how to get it off??

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  • mike229 Sep 07, 2009

    no, it's the plastic inlet/outlet that the hose hooks up to. The replacement is called a "quick disconnect"

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  • Master
  • 4,088 Answers

If you are talking about the brass tubes which are soldered into the core headers, they are not supposed to turn or be removed except with soldering heat. (600 to 800 degrees F.)

Posted on Sep 06, 2009

  • drallim Sep 08, 2009

    Look at the replacement for clue to removal. How did you get the first one off? You may have to pinch a couple of retaining clips together to release the latch like fuel filter quick-disconnects.

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Truck is overheating but no hot air in heater and full of antifreeze


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How can i get to my heater core to replace it on a 86 cadillac fleetwood 5.0


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1. Disconnect electric-al connectors at blower motor, compressor cycling switch, power

module and radio lead-in connections.

2. Remove righthand windshield washer nozzle.

3. Remove righthand secondary air inlet screen from plenum.

4. Partially remove rubber molding above plenum.

5. Remove remaining screws and the primary inlet screen.

6. Remove blower motor.

7. Remove two screws securing compressor cycling switch to module and position

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8. Remove AC module cover attaching screws and the cover.

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WERE IS THE HEATER CORE VALVE IN 1990 LINCOLN


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How to remove the blower motor from a 1978 ford bronco full size truck?


Deluxe Hi-Lo Heater
  1. Disconnect the battery cable, remove the carburetor air cleaner and partially drain the coolant system.
  2. Remove the heater hoses from the heater core.
  3. Remove the glove box liner and remove the register duct by pulling from the instrument panel register and releasing the clip at the plenum.
  4. Disconnect the right cowl outside air inlet vacuum hose from the outside/recirculating door vacuum motor.
  5. Remove the rear housing from under the instrument panel. Remove the outside air inlet duct from the rear housing (4 nuts and 1 bolt) and install one upper nut to retain heater housing-to-dash after rear housing is removed.
  6. Remove two screws retaining plenum-to-dash (above transmission tunnel) and two screws to heater housing and remove the plenum.
  7. Install a piece of protective tape on A-pillar inner cowl panel, at lower right corner of instrument panel.
  8. Remove the lower right instrument panel-to-A-pillar bolt to hold the panel in the rearward position.
  9. Remove the heater core (3 screws retaining 2 plates).
  10. Remove the temperature blend door (snaps off).
  11. Remove the temperature blend door arm support (2 screws) and pivot arm retainer (1 screw).
  12. Remove blower motor (2 screws) and remove blower wheel.

To install:
  1. Transfer blower to blower motor and panel assembly.
  2. Install door arm pivot retainer (1 screw) and door arm support (2 screws).
  3. Install the temperature blend door (snaps on).
  4. Install heater core.
  5. Install the plenum (4 screws).
  6. Connect blower wires.
  7. Remove heater housing upper retaining nut and install the heater outlet (4 nuts and 1 bolt). Position the air inlet duct.
  8. Connect the white vacuum hose to the outside/recirculating door vacuum motor.
  9. Reposition the instrument panel, install the retaining bolts and remove the protective tape at the A-pillar inner cowl panel, lower right corner of instrument panel.
  10. Install the right register duct assembly and install the glove box liner.
  11. Connect heater hoses to the heater core assembly.
  12. Fill cooling system, install the air cleaner and connect the battery cable to the battery.
  13. Check blower motor operation.

Jan 19, 2010 | 1981 Ford Bronco

1 Answer

I need to replace the heat core in my blazer... how do i do this?


Draining the Cooling System
  • Park the vehicle on a level surface. If the engine has been running allow it to cool completely.
  • Drain the cooling system. Remove the radiator cap from the radiator. Locate the petcock valve on the lower corner of the radiator. Place a waste oil collection pan underneath the petcock valve and turn it counterclockwise to open. Allow the cooling system to drain completely.
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  • Remove the heater core cover. Move to inside the passenger compartment. Locate the heater case. It will be bolted to the firewall, below the dash on the passenger side of the vehicle. Use an appropriate sized socket or wrench to remove the five screws that connect the heater core cover to the heater case, and remove the cover.
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  • Remove the heater core by pulling it out of the heater case.
Installing the Heater Core
  • Place the new heater core into position inside the heater case. Be sure to carefully guide the inlet and outlet tubes through the holes in the firewall.
  • Reinstall the heater core retaining straps, by reinstalling the four screws that secure them.
  • Place the heater core cover into position over the heater case and reinstall the five screws that secure it.

Refilling the Cooling System
  • Reconnect the heater hoses to the heater core. Slide the hoses onto the inlet and outlet fittings that extend through the firewall, and tighten the hose clamps.
  • Close the petcock valve on the lower corner of the radiator by turning it clockwise.
  • Refill the radiator with a 50/50 mix of antifreeze and water.
  • Reinstall the radiator cap onto the radiator.
  • Run the engine and visually inspect for leaks.
Good luck and take your time, keep me posted and don't forget to rate please.

Jan 08, 2010 | 1989 Chevrolet S-10 Blazer

1 Answer

What do i have to remove to replace the heater core in my 1991 chevy s10 with a 2.8 v6


Draining the Cooling System
  • Park the vehicle on a level surface. If the engine has been running allow it to cool completely.
  • Drain the cooling system. Remove the radiator cap from the radiator. Locate the petcock valve on the lower corner of the radiator. Place a waste oil collection pan underneath the petcock valve and turn it counterclockwise to open. Allow the cooling system to drain completely.
  • Label and remove the heater hoses from the heater core. The heater hoses will connect to the heater core in the engine bay, on the firewall, on the passenger side of the vehicle. Use either the Phillips or the flat-blade screwdriver to loosen the hose clamps that secure the hoses to the heater core. Then pull the hoses off the heater core.
Removing the Heater Core
  • Remove the heater core cover. Move to inside the passenger compartment. Locate the heater case. It will be bolted to the firewall, below the dash on the passenger side of the vehicle. Use an appropriate sized socket or wrench to remove the five screws that connect the heater core cover to the heater case, and remove the cover.
  • Remove the steel straps that secure the heater core to the heater case. Unscrew the four screws that connect the steel straps to the heater case using a socket or wrench and remove the straps.
  • Remove the heater core by pulling it out of the heater case.
Installing the Heater Core
  • Place the new heater core into position inside the heater case. Be sure to carefully guide the inlet and outlet tubes through the holes in the firewall.
  • Reinstall the heater core retaining straps, by reinstalling the four screws that secure them.
  • Place the heater core cover into position over the heater case and reinstall the five screws that secure it.

Refilling the Cooling System
  • Reconnect the heater hoses to the heater core. Slide the hoses onto the inlet and outlet fittings that extend through the firewall, and tighten the hose clamps.
  • Close the petcock valve on the lower corner of the radiator by turning it clockwise.
  • Refill the radiator with a 50/50 mix of antifreeze and water.
  • Reinstall the radiator cap onto the radiator.
  • Run the engine and visually inspect for leaks.
Good luck and take your time.

Dec 10, 2009 | 1991 Chevrolet S-10

1 Answer

99 Chevy 1500 heater core inlet hose male fitting broke


well you may need to replace the entire heater core if the remaining inlet/outlet nipple is not long enough. common problem many people have

May 27, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

Blown heater core in a 1977 ford f-150 pick-up


1976-79 Without Air Conditioning
  1. Disconnect the temperature and function control Bowden cables from the heater housing. This must be done to prevent damage to the cables.
  2. Disconnect the wires from the blower resistor.
  3. Remove five screws attaching the air inlet (vent) duct to the heater housing.
  4. Disconnect the blower wires.
  5. Drain the radiator and remove the heater hoses from the heater core.
  6. Remove three heater stud retaining nuts and remove heater.
  7. Remove gasket between the heater hose ends and the dash panel at core tubes.
  8. Remove heater core cover and gasket (four screws).
  9. Pull heater core and lower support from heater.

To install:
  1. Install foam gaskets on heater core and install in heater assembly.
  2. Install the core seal and cover plate.
  3. Position heater assembly in vehicle and install three stud retaining nuts.
  4. Connect heater hoses to heater core and fill radiator.
  5. Connect blower motor wires.
  6. Place defroster nozzle on heater so that the defroster and heater openings are in the up position, and there is no air leak around the seal.
  7. Install air inlet (vent) duct to heater. Push duct firmly against seal on side cowl and tighten five attaching screws.
  8. Connect wires to blower motor resistor.
  9. Connect temperature and function control cables to heater, and adjust the cables.
  10. Reinstall gasket between the heater hose ends and the dash panel at core ends.
  11. Fill Cooling System.

  12. Hope this helps you! Please remember to rate my solution.

    Lefty64

Apr 09, 2009 | 1986 Ford F150 SuperCab

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