Question about 2000 Mercury Grand Marquis

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Can the brass fitting that the heater hose covers at the back of motor be screwed out?

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If you mean the intake manifold, I dont think it can.

Posted on Aug 30, 2010

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How do you get to the hoses to the heater core


From under the hood. The hoses go into the firewall behind the engine. Loosen the hose clamps and pull the hoses off, right at the firewall. The two brass fittings the hoses connect to are the fittings on the heater core.

Jan 20, 2017 | Cars & Trucks

1 Answer

Need to replace heater core? how do i remove old one and replace new one?


Here are the instructions with a diagram. If you need to enlarge the diagram save it to your picture files and then enlarge it there.

1. Disconnect battery ground cable, then drain cooling system. See: Engine, Cooling and Exhaust\Cooling System\Service and Repair

2. Disconnect heater hoses from heater core. Plug heater hoses and core fittings to prevent coolant spillage.


3. Remove bolt located below windshield wiper motor, attaching left end of plenum to dash panel.


4. Remove nut attaching upper left corner of evaporator or heater case to dash panel.
5. Disconnect vacuum control system supply hose from vacuum source, then push grommet and hose into passenger compartment.

6. Remove all instrument panel retaining screws and pull instrument panel back as far as possible without disconnecting any wire harnesses.
7. Loosen right door sill plate and remove side cowl trim panel.

8. Disengage temperature control cable housing from bracket on top of plenum. Disconnect cable from temperature blend door crank arm.

9. On models w/Automatic Temperature Control (ATC) , remove cross body brace and disconnect wiring harness from temperature blend door actuator and disconnect ATC sensor tube from evaporator case connector.
10. Disconnect vacuum harness at vacuum connector near floor air distribution duct.

11. Disconnect white vacuum hose from outside recirculating air door vacuum motor.
12. Remove two hush panels.

13. Remove one plastic push fastener retaining floor air distribution duct to left end of plenum. Remove left screw and loosen right screw on rear face of plenum. Remove floor air distribution duct.

14. Remove two screws from rear side of floor air distribution duct to plenum. To remove right screw, it may be necessary to remove the two screws attaching lower panel door vacuum motor to mounting bracket.

15. Remove push fastener attaching floor air distribution duct to left end of plenum, then remove floor air distribution duct.
16. Remove two nuts located along lower flange of plenum.
17. Carefully move plenum rearward, so that heater core tubes and plenum case upper stud clear openings in dash panel, then remove plenum from vehicle by rotating upper portion of the plenum forward, down and out from under instrument panel. It may be necessary to carefully pull lower edge of instrument panel rearward while plenum is being removed from behind instrument panel.
18. Remove retaining screws from heater core cover, then the cover from plenum assembly.

19. Remove retaining screw from heater core inlet and outlet tube bracket.


Heater core removal and installation diagram.




emissionwiz_78.jpg

20. Pull heater core and seal assembly from plenum assembly.
21. Reverse procedure to install.

Jan 06, 2011 | 1993 Mercury Grand Marquis

1 Answer

Need to change heater coil need a diagram to do so


  1. Drain the coolant. Refer to Draining and Filling Cooling System .
  2. Remove the instrument panel storage compartment.
  3. Disconnect the electrical connectors, as necessary.
  4. Remove the center floor air distribution duct.
  5. Remove the hinge pillar trim panels.
  6. Remove the blower motor cover.
  7. Remove the blower motor.
  8. Remove the steering column.
  9. Roll back the instrument panel. Refer to IP Carrier Replacement in Instrument Panel, Gauges and Console.
  10. Remove the coolant recovery reservoir.
  11. Remove the heater hoses.
  12. While holding the heater case to the cowl, remove the screw on the interior side of the cowl, near the evaporator pipe, if equipped.
    1. On the engine side of the cowl, remove the 4 screws that hold the heater case to the cowl.
    2. On the engine side of the cowl, remove the 2 nuts that hold the heater case to the cowl.
    3. Remove the heater case. Ask an assistant for help, if necessary.
    4. Remove the 7 screws that hold the heater cover to the heater case.
    5. Remove the heater cover.
    6. Remove the heater core from the retainer.
    7. Installing
      1. Install the heater core into the retainer.
      2. Install the 7 screws that hold the heater cover to the heater case. Replace the seals.
      3. Install the heater cover. Verify that the heater cover is properly sealed.
      4. Install the heater case. If necessary, ask an assistant for help.
      5. On the engine side of the cowl, install the nuts that hold the heater case to the cowl.
      6. On the engine side of the cowl, install the 4 screws that hold the heater case to the cowl.
        1. On the interior side of the cowl, install the screw.
        NOTE : Refer to Fastener Notice in Cautions and Notices.

        1. Tighten the following fasteners:
        Tighten
        • Tighten the screws on the engine side of the cowl to 1.9 N.m (17 lb in) .
        • Tighten the two nuts to 2.8 N.m (25 lb in) .
        • Tighten the screw on the interior side of the cowl to 11 N.m (97 lb in) .
        1. Install the heater hoses.
        2. Install the coolant recovery reservoir.
        3. Roll forward the instrument panel. Refer to IP Carrier Replacement in Instrument Panel, Gauges and Console.
        4. Install the steering column.
        5. Install the blower motor.
        6. Install the blower motor cover.
        7. Install the hinge pillar trim panels.
        8. Install the center floor air distribution duct.
        9. Connect the electrical connectors, as necessary.
        10. Install the instrument panel storage compartment.
        11. Add the engine coolant. Refer to Draining and Filling Cooling System
        12. Inspect the system for leaks.
        13. bonedivers_0.gifbonedivers_1.gifbonedivers_2.gifbonedivers_3.gif

Dec 15, 2010 | 1999 Chevrolet Silverado 1500

1 Answer

Is the heater core on a 1981 bronco in the engine compartment or the cab compartment


in the cab, but procedures are different depending on whether or not you have A/C. See below

1980-81 Comfort Vent Heaters, Without Air Conditioning
  1. Disconnect the heater hoses from the heater core tubes and plug the hoses with suitable 5 / 8 inch; (16mm) plugs.
  2. Remove the glove compartment liner.
  3. Remove two (2) spring clips attaching the heater core cover to the plenum along the top edge of the heater core cover.
  4. Remove eight (8) screws attaching the heater core cover to the plenum and remove the cover.
  5. Remove the heater core from the plenum taking care not to spill coolant from the core.
To install:
  1. Install the heater core in the plenum.
  2. Install the heater core cover (eight (8) screws and two (2) spring clips along the top edge of the cover).
  3. Install the glove compartment liner.
  4. Connect the heater hoses to the heater core. Tighten the hose clamps.
  5. Add coolant to raise the coolant level to specification.
  6. Check the system for proper operation and for coolant leaks.

1980-81 Standard & High Output Heaters, Without Air Conditioning
  1. Disconnect the temperature cable from the temperature blend door and the mounting bracket on top of the heater case.
  2. Disconnect the wires from the blower motor resistor and the blower motor.
  3. Disconnect the heater hoses from the heater core and plug the hoses with suitable 5 / 8 inch; (16mm) plugs.
  4. Working under the instrument panel, remove two (2) nuts retaining the left end of the heater case and the right end of the plenum to the dash panel.
  5. In the engine compartment, remove one (1) screw attaching the top center of the heater case to the dash panel.
  6. Remove two (2) screws attaching the right end of the heater case to the dash panel, and remove the heater case from the vehicle.
  7. Remove nine (9) screws and one (1) bolt and nut attaching the heater housing plate to the heater case, and remove the heater housing plate.
  8. Remove three (3) screws attaching the heater core frame to the heater case and remove the frame.
  9. Remove the heater core and seal from the heater case.

To install:
  1. Position the heater core and seal in the heater case.
  2. Install the heater core frame (3 screws).
  3. Position the heater housing plate on the heater case and install the nine (9) screws and one (1) bolt and nut.
  4. Position the heater case to the dash panel and install the three (3) attaching screws.
  5. Working in the passenger compartment, install two (2) nuts to retain the heater case and plenum right end to the dash panel.
  6. Connect the heater hoses to the heater core. Tighten the hose clamps.
  7. Connect the wires to the blower motor resistor assembly.
  8. Connect the blower motor wires.
  9. Position (slide) the self-adjusting clip on the temperature cable to a position approximately one 1 inch; (25.4mm) from the cable end loop.
  10. Snap the temperature cable on the cable mounting bracket of the heater case. Then, position the self-adjusting clip on the door crank arm.
  11. Adjust the temperature cable.
  12. Check the system for proper operation.

Oct 05, 2010 | 1981 Ford Bronco

2 Answers

How to install a new top and bottom hvac heater hose fitting for a 2002 buick lesabre custom


The hoses are moved by turning them a few degree's, then pulling them off. See diagram below.

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Jun 19, 2010 | 2002 Buick LeSabre

1 Answer

How do i replace the heater core in a 1983 oldsmobile cutlass supreme


the heater core is located under the dash board on the passenger side there is a few cap screws holding this black plastic box that hides the heater core loosen all the screws .take the plastic out of the way and u will see the heater core .there are two hoses to disconnect on the out side .under the hood on the passenger side .up near the fire wall .the re is a avaperation tank silver in color for the a/c under that there are two heater hoses to disconnect .when u remove the two hoses .they will leak antifreeze .bend the hoses over to kink them .tie some elec tape around them to keep them from leaking .go back in the car and loosen the four small screws that hold the heater core in place and remove .....in stall the new one the same way .taking care when putting the new one through the fire wall not to damage the brass tubing ...mount heater core first the place hoses on after the screws are holding the heater core in place then put plastic cover on start car and wait for thermostat to open .turn heater on hot .after water is circulating .refill radaitor ...job done...

Dec 03, 2009 | 1983 Oldsmobile Cutlass Supreme

1 Answer

1996 suburban heater core, it is leaking?


PLEASE REMEMBER TO RATE ME THANK YOU RejakWilson






HEATER CORE

Remove or Disconnect

  1. Engine coolant.
  2. Instrument panel storage compartment.
  3. Electrical connectors, as necessary.
  4. Center floor air distribution duct.
  5. Hinge pillar trim panels.
  6. Blower motor cover.
  7. Blower motor.
  8. Steering column.
  9. Roll instrument panel back.
  10. Coolant recovery reservoir.
  11. Heater hoses.Screw on interior side of cowl, near the evaporator pipe (if equipped) while holding heater case to the cowl
  12. Four screws on the engine side of the cowl holding the heater case to the cowl.
    1. Two nuts on the engine side of the cowl holding the heater case to the cowl.
    2. Heater case.
      • It may be necessary to have an assistant when removing heater case.
    1. Heater cover.
      • Remove seven screws that hold cover to the heater case.
    1. Heater core from retainer
Install or Connect

  1. Heater core into retainer.
    • Install seven screws that hold heater cover to heater case.
  1. Heater cover.
    • Make sure heater cover is properly sealed.
  1. Heater case.
    • May be necessary to have an assistant when installing heater case.
  1. Nuts.
  2. Screws.
Tighten

  • Screws on engine side of the cowl to 1.9 N.m (17 lb in) .
  • uts to 2.8 N.m (25 lb in) .
  • Screw on interior side of the cowl to 11 N.m (97 lb in) .
  1. Heater hoses.
  2. Coolant recovery reservoir.
  3. Roll instrument panel forward.
  4. Steering column.
  5. Blower motor.
  6. Blower motor cover.
  7. Hinge pillar trim panels.
  8. Center floor air distribution duct.
  9. Electrical connectors, as necessary.
  10. Instrument panel storage compartment.
  11. Engine coolant.
    • Check the system for leaks.

Mar 28, 2009 | 1996 GMC Suburban

1 Answer

1998 lincoln towncar coolent leak


look at the brass tube fitting at the back of the intake that heater hose hooks to ,it will usually crack at the intake around that fitting. If so intake will have to be replaced.

Mar 03, 2009 | 1998 Lincoln Town Car

1 Answer

1995 camaro hvac motor location


  1. Drain the engine coolant into a suitable container.
  2. Open the instrument panel glove compartment. Push in on the sides of the compartment to release it, allowing access to the heater core.
The heater core can be damaged if too much force is applied to the heater core pipes during hose removal.
  1. Remove the heater module screws and remove the heater module assembly cover. For vehicles equipped with A/C, remove the air conditioning evaporator temperature sensor assembly from the heater and A/C cover.
  2. Remove the heater core screw and clamp.
  3. Remove the hose pipe clamp screw and the hose pipe clamp. Clamp off the heater hoses.
0900c152800b8721.jpgFig. 1: Heater hose and pipe routing-3.4L engine 0900c152800b8722.jpgFig. 2: Heater hose and pipe routing-3.8L engine 0900c152800b8723.jpgFig. 3: Heater hose and pipe routing-5.7L engine
  1. Disconnect the heater hoses from the pipes.
  2. Remove the heater core by carefully pulling it towards you.
0900c152800b8724.jpgFig. 4: Exploded view of the heater core removed from the heater module assemblyTo install:
  1. Install the heater core and attach the heater hose assembly to the heater hose pipes. Note the following:
    1. Lubricate the heater core pipes with petroleum jelly for ease of installation and to assure a good seal.
    2. Be sure the seals around the heater pipes remain in place when installing.
    3. To verify that the seal is installed correctly, observe the seal from inside the engine compartment. If the seal has leaks, apply a sealer between the heater core pipes and the evaporator housing.
  2. Install the hose pipe clamp and the bolt/screw. Unclamp the heater hoses. Tighten the hose pipe clamp bolt/screw to 16 inch lbs. (1.8 Nm).
  3. Install the heater core clamp and screw. Tighten the screw to 16 inch lbs. (1.8 Nm).
  4. Install the heater module assembly cover and secure with the retaining screws. Tighten the screws to 18 inch lbs. (2 Nm).
  5. Connect the negative battery cable.
  6. Refill the cooling system. Operate the engine and check for leaks, add coolant if necessary.
  7. Install the instrument panel glove compartment.

Feb 03, 2009 | 1995 Chevrolet Camaro

1 Answer

Changing a heater core


here is a step by step diagram to replace your heater core
Front
  1. Disconnect the negative battery cable.
  2. Drain the cooling system.
  3. Remove the instrument panel glove compartment.
  4. Tag and unplug all electrical leads as necessary.
  5. Remove the center air distribution duct from the floor.
  6. If necessary, remove the ECM and mounting tray.
  7. Remove the hinge pillar trim panels.
  8. Remove the blower motor cover and then remove the motor.
  9. Remove the steering wheel and tilt back the instrument panel slightly.
  10. Remove the coolant overflow tank. Disengage the heater hoses at the core connections.
  11. Unfasten the attaching screws and nut and then remove the heater case.
  12. Remove the seven screws and lift off the heater case cover.
  13. Remove the fasteners and brackets that hold the heater core to the case and lift the core from the case.
To install:
  1. Install the heater core in the case.
  2. Install the heater case bottom plate. Make sure there is a good seal.
  3. Install the heater case into the truck. Tighten the 4 lower screws to 17 inch lbs. (2 Nm); the upper screw to 97 inch lbs. (11 Nm); and the nuts to 25 inch lbs. (2.8 Nm).
  4. Connect the heater hoses at the core tubes.
  5. Install the coolant overflow tank.
  6. Install the instrument panel and the steering wheel.
  7. Install the blower motor and cover.
  8. Install the trim panels and if removed, the ECM. Install the air distribution duct and reconnect all electrical leads.
  9. Install the glove compartment. Fill the cooling system and connect the battery cable.
  1. Disconnect the negative battery cable.
  2. Drain the engine cooling system into a clean container for reuse.
  3. Disconnect the heater hoses from the heater core.
  4. Remove the instrument panel storage compartment.
  5. Disconnect the electrical connectors, as necessary, that may be in the way.
  6. Remove the center floor air distribution duct.
  7. Remove the hinge pillar trim kick panels.
  8. Remove the blower motor cover screws and the cover.
  9. Remove the blower motor screws and the blower motor.
  10. Remove the steering wheel and the steering column (standard & tilt).
  11. Remove the instrument panel fasteners and pull the instrument panel back far enough to gain access to the heater assembly.
  12. While holding the heater assembly against the firewall, remove the screw located on the interior side near the evaporator pipe, if equipped.
  13. In the engine compartment, remove the 4 heater assembly-to-chassis screws and the 2 heater assembly-to-chassis nuts.

    NOTE Removal of the heater assembly may require the help of an assistant.
  14. Remove the 7 heater cover-to-heater assembly screws and the cover.
  15. Remove the heater core from the heater assembly.
    93113g80.gif View of the front heater assembly—Chevy/GMC C/K-Series, Blazer, Jimmy, Sierra, Suburban, Tahoe, Yukon
    Click to Enlarge
    93113g81.gif Location of the front heater assembly-to-chassis fasteners—Chevy/GMC C/K-Series, Blazer, Jimmy, Sierra, Suburban, Tahoe, Yukon
    Click to Enlarge
To install:
  1. Install the heater core to the heater assembly.
  2. Install the heater cover and the 7 heater cover-to-heater assembly screws.

    NOTE Installation of the heater assembly may require the help of an assistant.
  3. In the engine compartment, install the 4 heater assembly-to-chassis screws and the 2 heater assembly-to-chassis nuts. Torque the screws to 17 inch lbs. (1.9 Nm) and the nuts to 25 inch lbs. (2.8 Nm).
  4. While holding the heater assembly against the firewall, install the screw located on the interior side near the evaporator pipe, if equipped. Torque the screw to 97 inch lbs. (11 Nm).
  5. Install the instrument panel and the instrument panel fasteners.
  6. Install the steering column (standard & tilt) and the steering wheel.
  7. Install the blower motor and the blower motor screws.
  8. Install the blower motor the cover and the cover screws.
  9. Install the hinge pillar trim kick panels.
  10. Install the center floor air distribution duct.
  11. Connect the electrical connectors that were disconnected.
  12. Install the instrument panel storage compartment.
  13. Disconnect the heater hoses to the heater core.
  14. Refill the engine cooling system.
  15. Connect the negative battery cable.
  16. Run the engine to normal operating temperatures; then, check the climate control operation and check for leaks.

Dec 31, 2008 | 1994 Chevrolet C1500

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