Question about 1998 Chevrolet K1500

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Heater-core re-placement 1998 K-1500 w/air

It's only a work truck,they want $500.00 to fix. they all say they have to pull the dash out,but there are 7 screws under the heater box. It looks like the bottom of an oil pan. if i remove the screws,woundn;t it expose the heater core??. or can I cut a hole out of the box to get at it and epoxy the box back together?? I don't care what it looks like, it's only a work truck. thanks john

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The problem is one of accessability. The heater core is wedged in between to halves of an air distribution case and held in position with two clamps. If you remove the lower cover, you may be able to see the heater core, but you may find that the tubes that protrude from the side of the core will prevent its removal. The normal procedure is to discharge the A/C system with the proper recovery equipment and remove the entire heater box as a unit. Cutting into the case may damage the doors and actuators that control the blend-air and mode operations of the unit as a whole. I had the same problem with my 78 LeBaron, and the dash assembly had to be removed to allow the heater box to come out.

Posted on Sep 28, 2008

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Where is the placement for a heater core for a 2006 chevy uplander


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List Heater Core 2006 Chevrolet Uplander Reilly Auto Parts 26319121-1xghuso0dtf1wvqnhgyxjoi3-1-0.gif

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Heater core 2004 chrysler pacifica replace


  1. Remove the silencer boot fasteners located around the base of the lower steering shaft from the dash panel so that it may be pushed aside.
  2. Remove the brake lamp switch from its mounting bracket.
  3. Disconnect the power brake booster input rod (push rod) from the pin on the brake pedal arm.
  4. If equipped with power adjustable pedals, remove the adjustable pedal assembly.
Note: Take the proper precautions to protect the carpeting below the heater core from spilled engine coolant and have absorbent toweling readily available to clean up any spills.

  1. Remove the heater core tubes.
  2. Remove the two screws that secure the heater core mounting plate to the HVAC air distribution
    1. If NOT equipped with power adjustable pedals, pull the accelerator pedal upward and push the brake pedal downward for clearance to remove the heater core from the air distribution housing.
    2. Remove the heater core by carefully pulling it straight out of the side of the air distribution housing.
    Installation

    1. If NOT equipped with power adjustable pedals, pull the accelerator pedal upward and push the brake pedal downward for clearance to install the heater core into the HVAC air distribution housing.
    2. Install the heater core by carefully pushing it straight into the side of the air distribution housing.
    3. Install the two screws that secure the heater core to the air distribution housing. Tighten the screws to 2 Nm ( 17 in lbs ) .
    4. Install the heater core tubes.
    5. If equipped with power adjustable pedals, install the adjustable pedal assembly.
    6. Connect the power brake booster input rod to the pin on the brake pedal arm.
    7. Install a new brake lamp switch.
    8. Install the silencer boot around the base of the lower steering shaft on the dash panel.
    9. Reconnect the negative battery cable.
    10. If the heater core is being replaced, flush the cooling system.
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Nov 01, 2011 | 2004 Chrysler Pacifica

1 Answer

Replacing heater core chryler picifica


  1. Remove the silencer boot fasteners located around the base of the lower steering shaft from the dash panel so that it may be pushed aside.
  2. Remove the brake lamp switch from its mounting bracket.
  3. Disconnect the power brake booster input rod (push rod) from the pin on the brake pedal arm.
  4. If equipped with power adjustable pedals, remove the adjustable pedal assembly.
Note: Take the proper precautions to protect the carpeting below the heater core from spilled engine coolant and have absorbent toweling readily available to clean up any spills.

  1. Remove the heater core tubes.
  2. Remove the two screws that secure the heater core mounting plate to the HVAC air distribution
    1. If NOT equipped with power adjustable pedals, pull the accelerator pedal upward and push the brake pedal downward for clearance to remove the heater core from the air distribution housing.
    2. Remove the heater core by carefully pulling it straight out of the side of the air distribution housing.
    Installation

    1. If NOT equipped with power adjustable pedals, pull the accelerator pedal upward and push the brake pedal downward for clearance to install the heater core into the HVAC air distribution housing.
    2. Install the heater core by carefully pushing it straight into the side of the air distribution housing.
    3. Install the two screws that secure the heater core to the air distribution housing. Tighten the screws to 2 Nm ( 17 in lbs ) .
    4. Install the heater core tubes.
    5. If equipped with power adjustable pedals, install the adjustable pedal assembly.
    6. Connect the power brake booster input rod to the pin on the brake pedal arm.
    7. Install a new brake lamp switch.
    8. Install the silencer boot around the base of the lower steering shaft on the dash panel.
    9. Reconnect the negative battery cable.
    10. If the heater core is being replaced, flush the cooling system.
    11. Refill the engine cooling system.
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1 Answer

My mercury Sable 2003 in blowing all cold air.I have replaced the thermostat,checked the tubing under the hood and replaced the temperature control switch.I am left with replacing the heater core.I bought...


replacing the thermostat on an otherwise good running car is not going to fix a heater, now you know that. yes you are going to have to pull the dash, and it is a complex procedure, to swap the core. i would call a shop which does a lot of heater and A/C work as if you pull a lot of dashboards you get good and fast at it. stay away from a dealer

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1 Answer

Only drivers side heat is blowing cool air, passanger side is working fine. are there two different heating untis for this car since it has two separate controls? could it be a sensor or a flap? flap...


No there is one heating unit that has a flap that is controlled by the passenger side vs. driver side cooler or hotter knob or setting, if it's like my Cadillac. It's called a blend door. There is only one heater core that feeds the two separate sides.

Will have to pull the dash, and inspect the vacuum lines and cables.

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.
f74-01.gif 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.

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1 Answer

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---------------------------------------------------------------------------------------
Section 12-03A: Air Conditioning System—Manual A/C-Heater 1994 Crown Victoria/Grand Marquis. Workshop Manual
REMOVAL AND INSTALLATION Heater Core Removal
  1. Remove the heater air plenum chamber assembly as outlined.
  2. Heater Air Plenum Chamber Removal
    1. Disconnect battery ground cable .
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  1. Remove the four retaining screws from the heater core cover (18B300) and remove the heater core cover from the heater air plenum chamber assembly.

    Heater Core Removal


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    Item Part Number Description 1 390092-S2 Screw (2 Req'd) 2 18658 Heater Core Case Seal 3 18476 Heater Core 4 18570 Heater Dash Gasket 5 18471 Heater Air Plenum Chamber 6 18B300 Heater Core Cover
  1. Pull the heater core assembly from the heater air plenum chamber assembly.
Installation
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  1. Install the heater air plenum chamber assembly as outlined.

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1 Answer

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1 Answer

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Goodluck.

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