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I need to replace my heater core in a 1991 chevy lumina

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Go ahead. And while you're at it, this listing is for air conditioners. You'd be better off if you told the heater people or the car people that you need to replace your heater core.

Posted on Jul 24, 2008

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How do you replace the heater core

Most heater cores are located below the dash board on the passenger side, it does involve a lot of labor for the most part. In rare cases the dash has to be totally removed, but most heater cores can be removed by removing plastic panels or covers underneath the passenger side dash board. Mind you that there's a lot of bolts and fastners to be removed and wire harnesses to disconnect just to reach the heater core. Then you have to remove 2 heater hoses in the engine compartment other wise the heater core will not come out from underneath the dash board. You also have to remove the glove compartment to have easier access to the air ducts you have to remove, takes quite a while if you don't know what you are doing.
I just replaced the heater core on my Oldsmobile and it took me several hours just to undo all the ducts, bolts and fastners to get to the heater core, the labor involved is what gives you trouble most of the time.

Mar 05, 2015 | Haynes Hyundai Sante Fe Repair Manual...

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Why is my 2007 chevy impala leaking water in my car? its not rain

Most likely the heater core is leaking. The heater core is located behind the dash board and depending on the vehicle can be quite a job to do yourself or if you have someone else do it then it will be expensive. For example on a 2000 Chevy Silverado the Flat rate time is around 8 hours. So add the cost of the heater core, possibly if the heater core is bad, ( Usually from not maintaining the proper mixture of coolant) then there is a possibility that the cooling system may be full of corrosion leading to possibly having to replace the radiator, thermostat and water pump soon after. Shop rates per hour vary but they can range anywhere from $ 65 an hour for a low budget shop to over a $100 an hour for a top of the line shop. Remember you get what you pay for. If your heater core is leaking it is also possible your floor board may be damp. You could also smell it in your car.

Nov 05, 2014 | 2007 Chevrolet Chevrolet Impala SS

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Water is dripping from behind the glove box. The drip is slow when the heat is on, and very rapid when the A/C is on. I don't notice much of a drip as long as the heat or A/C is off.

Your heater core is most likely leaking or possibly the hose connecting to the firewall. Bad situation either way as it needs to come out for repair. Might need to remove glove box and associated plastic around the area to get at the heater core. Remove heater hose attached to firewall in engine compartment(2) Will drain water so be careful. To drive vehicle w/o using either heat or cool attach the two hoses you just removed by using a pipe that fits tightly inside them and a screw clamp on both hoses. this will get you by unitl you can fix the core.

Apr 20, 2013 | 2007 Chevrolet Chevrolet Cobalt LT

1 Answer

How to replace a heater core on 1990 ford aerostar


Sep 25, 2012 | Pro Tools 1991 Ford Aerostar Heater Core

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Heater core replacement on a 1994 astro van

1 Drain the van's engine coolant. With the engine cool and the parking brake applied, remove the radiator cap, place a large container under the radiator drain and remove the drain fitting. After draining the coolant at the radiator, move the container to the engine block and remove its drain plug to drain the remaining coolant.

2 Remove the coolant reservoir by disconnecting the overflow hose from the radiator filler neck, removing the fasteners for this reservoir and the windshield washer fluid reservoir, lifting both up and separating the coolant reservoir from the other one. This is needed if the van is a 1994 model or older. On newer models, disconnect the reservoir for the windshield washer fluid by removing its bolts and moving it aside.

3 Detach the heater hoses from the heater core tubes at the firewall by loosening their hose clamps. Plug the core tubes with rubber to prevent contaminants from entering.

4 Reach under the dashboard in the van's passenger compartment and remove the screws for the heater core cover to remove it--the cover should have a half-cylinder shape. Remove the two mounting screws at the rear of the heater core and lift the core out of its housing.

5 Insert the new heater core into the housing and fasten it with the mounting screws. Connect the core cover back in place.

6 Unplug and reconnect the hoses to the heater tubes with their clamps. Reconnect any components (like the washer fluid reservoir or coolant reservoir) that you disconnected to access the hoses.

7 Refill the coolant after replugging the drains at the radiator and engine block. Add the 50/50 mix of water and antifreeze to the radiator until it's full and the reservoir to the lower mark. Run the engine in a ventilated area with the radiator cap off until the upper radiator hose is hot, shut off the engine and let it cool, then add more coolant up to the reservoir's lower mark.

Jun 27, 2011 | Heating & Cooling

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The dealer is changing the heater core because there is no heat coming from the drivers side. The center and passenger vents have good warm air coming from them. How can a heater core be the problem if you...

Don't know what make and model vehicle you have. But, I'd suspect a loose vent hose to the outlets that have no heat. Or the blend door is stuck in the wrong position. Can you get hot air to the defroster, when you turn the control knob to defrost? If so, it's more than likely the blend door.

Feb 07, 2011 | Heating & Cooling

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2002 audi a6 not heat

Common problem on Audi cars. You need to replace the heater core. Its located under the dash board. Over time, the heater core gets clogged especially if you dont do coolant flush. The replacement part is cheap, but the labor involved will kill your wallet.


Nov 04, 2010 | Heating & Cooling

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