Question about 1990 Buick Century

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Heater core replacement

1990 Buick Century V6 heater core problem. how do you replace it? where is it located? Car overheats and sends coolant through the vents into passenger compartment. was told the heater core should be replaced.

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You have to remove the entire front of the heater case to change thecore. This usually looks a lot easier in print than it actually IS.Theinstructions say to remove the lower part of the dash for access; usually youdon't have to remove the entire dash for this type of service, althoughsometimes it makes things easier if you loosen and remove any components notmentioned in the procedure that are in your way.
This kind of repair can be frustrating, as it involves working in tightplaces and with 1/4 drive extensions and universal sockets to get all thefasteners out, but it IS possible.Here is what I have for the factoryprocedure. I don't know of any shortcuts to make the process easier; if you can'tget it off, perhaps removing the dash completely for more room would be aviable option...


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Posted on May 27, 2009

  • Corey Malone
    Corey Malone May 27, 2009







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    LESS A/C


    1.
    Drain cooling system.

    2.
    Disconnect heater
    inlet and outlet hoses.


    3.
    Remove lower
    instrument panel sound insulator, then radio noise suppression strap.


    4.
    Remove cover
    retaining screws and cover.


    5.
    Remove heater
    core strap, then heater core.


    6.
    Reverse procedure
    to install.


    WITH A/C


    1.
    Drain cooling system.

    2.
    Disconnect heater
    inlet and outlet hoses.


    3.
    Remove lower
    instrument panel sound insulator, then heater floor outlet duct.


    4.
    Remove heater
    core cover screws and clips securing cover to air valve housing, then heater
    core cover.


    5.
    Remove heater
    core retaining straps, then heater core.


    6.
    Reverse procedure
    to install.




×

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Imy 98 buick is overheating the water comes out from the pasenger side inside da car..right under the glove box


That is where your Heater core is located. Its like a little radiater that your vents blow thru to get hot air for heating your interior. If thats leaking, its not gunna stop. Take this car in right away before you run your coolent dry and trash your car.

Jan 10, 2011 | 1998 Buick Century

1 Answer

Where is the heater core on a 1995 Buick Century?


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.

Dec 14, 2010 | 1995 Buick Century

1 Answer

How do I change a Heater core on a 1990 Buick Century


Inspect/Replace 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.

Nov 26, 2010 | 1990 Buick Century

2 Answers

My 1995 buick century 4 door v6 3.1 is over


You need to change the "Coolant Temperature Sensor". That usually controls the fan. If the fan does not run, you will overheat.

Jul 28, 2010 | 1995 Buick Century

1 Answer

Oil droplets in engine coolant. Mileage about 100000 on 2002 V6 Buick Century.


Replace the head gasket. Don't wait any longer if you can or the engine may overheat and warp the head.

Jun 01, 2010 | 2002 Buick Century

1 Answer

Leaking heater corehow do I replace?


drain out your fluid
2.near the fire wall in engine, loosen clamps and remove heater hoses from th tubes running to the core.
3. remove dash panel on inside of car(passenger side)
4. remove the duct/vent from core.
5. remove cover(screwsand clips)
6. remove core retaining straps and pull out core.
installion is reverse and watch you dont loose too much coolant on your floor. Replace and fill coolant. run your heater to make sure you have no leaks

Dec 18, 2009 | 2003 Buick Century

1 Answer

My buick is releasing steam vapor though the vest and is leaking in the car from the dash, what could it be? and also it is leaking from underneth the passenger side.


Your heater core needs to be replaced. It's located on the passenger side , under the dash. The heater core is like a small radiator. Coolant from the engine is circulated through it, and that is what provides heat in the car. The heater core is leaking, causing the 'vapor' through the vents, and leaking on the carpet on the passenger side. Heater cores are a pain to remove and replace, it's quite a labor intensive job.

Sep 11, 2009 | 1989 Buick Century

1 Answer

Water on floor board on passenger side of 1991 Buick Century


Engine coolant will feel oily and the windshield will fog up and the car will stink. If it is just water it could be coming from the passenger door weatherstrip at top. The ac drain tube , if stopped up will also leak water in the floorboard.

Jun 17, 2009 | 1991 Buick Century

1 Answer

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that smell is coolant and yes you need to replace the heater core.

Mar 26, 2009 | 2000 Buick Century

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