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First you need to disconnect negative battery cable.
Then drain the radiator and pull the heater hoses. You'll also need to pull out the condensation tube.
The heater core sits directly behind the radio/heater controls. The housing cover for it is tucked behind the glove box, the steering column panel, and the vent housing. So they will need removed first to gain access to the housing.
Although a couple of the screws that hold the housing cover on are in some tight spaces a little patience will pull you through. One of them is right by the firewall behind the gas pedal.
The cover is epoxied to the firewall so you gotta be careful not to break it while prying it off. Once that is removed there are two metal straps that hold the heater core in. Remove those and pull the old one out.
Installation is pretty much reverse, except we hooked up the hoses before mounting the heater core. It gives you more of the inlet/outlet tubes to work with while putting the hoses back on.
Overall not a hard job at all. It took me and 1 other guy about 3 hours front to back, taking our time with a lot of breaks in between.
What else can I help you with?
How do you change the heater core and hoses on a 1991 Chevy Cavalier?
copy link and paste... http://www.v6z24.com/howto/heatercore
What is the easiest way to change the heater core on a 1991 Chevy Cavalier?
Looks like a piece of cake. Check out the following link: http://www.automotiveforums.com/vbulletin/t490722.html Its a how-to with pictures.
How do you disable the airbags on the steering column on a 1991 Chevy cavalier?
You don't. A 1991 Cavalier did not come with airbags.
Where is the heater core in a 1991 Chevy Cavalier Z-24?
It is in the firewall under all of the a/c ducts. Big job. Get a manual on your car to do the job properly.
Where is the brainbox on a 1991 Chevy Cavalier?
Behind the glove box.
How do you get to the fuel pump to change it in a 1991 Chevy Cavalier and how difficult is it?
It is in the gas tank. The tank must be removed. A very difficult job.
What are the torque specs for a 1991 Chevy Cavalier?
70 ft-lbbs
Where is the ecm located on 1991 Chevy Cavalier?
Behind the glove compartment.
How do you replace heater core in a 91 Chevy truck?
replace heater core in a 1991 Chevy work truck 1500
How do you change the timing belt on a 1991 cavalier?
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A diagram from a 1991 Chevy van G20 heater core box that a heater core come out of?
diagram for a 92 Chevy van g20 Heater core
How do you fix a bent front axle on a 1991 Chevy Cavalier?
You don't, you replace it.
