<!-- from fixya rte -->Remove heater core on corsica - 1991 Chevrolet Corsica

SOURCE: My 96 Corsica heater only blows out cold air so

no the only way that you may need to replace heater core is if it is leaking.not very often goes it clog to the piont it stop putting out heat.you need to check thermostat water level and heater control.

SOURCE: how do i change a heater core on a 1995 chevy

Changing the heater core is a simple process. Getting to the core to actually change it can be daunting if you have never changed one before on a corsica. All cars are different in that you have to remove enough dash parts to actually allow you to get to the core and they are all different. This is why labor charges are so high for changing a $50 part.I have never changed one on a Corsica myself. If you do this yourself, take digital photos as your go along so you will be able to put everything back in the correct order. I know this is not really the answer you want, but you are probably not going to get detailed instructions on how to do it, other than just remove enough parts to get to the heater core. Go slow and figure out how the parts come off and what parts to remove. Not an easy repair even if you have done it before. Good luck.

ZJ Limited

• 17989 Answers
• Posted on May 15, 2010

SOURCE: heater core 1991 corsica needs to be replaced

1991 VEHICLES

1. Disconnect the negative battery cable.
2. Drain the cooling system into a suitable container.
3. Properly disable the SIR system, as outlined earlier in this section.
4. Remove the instrument panel as outlined in this section.
5. Remove the screws and floor outlet, turning clockwise and to the right to release from the rear floor air outlet.
6. Raise the vehicle and support it safely.
7. Detach the heater hoses from the heater core.
8. Disconnect the drain tube elbow from the heater core cover.
9. Carefully lower the vehicle.
10. Unfasten the retaining screws, then remove the heater core cover.
11. Remove the core screws, clamps and heater core from the vehicle.
    

1. Reposition the heater core and install the straps and screws.
2. Install the heater core cover and attaching screws.
3. Install the floor outlet and retaining screws.
4. Install the instrument panel.
5. Raise the vehicle and support it safely.
6. Connect the heater hoses to the heater core.
7. Carefully lower the vehicle.
8. Fill the cooling system with the proper type and amount of coolant.
9. Enable the SIR system, as outlined earlier in this section.
10. Connect the negative battery cable, then start the engine and check for coolant leaks. Check the coolant level, and add if necessary.

Rick Wrieden

• 374 Answers
• Posted on Aug 31, 2010

SOURCE: How to install heater core

first remove two heater hoses that run to firewall,then remove center console and lower section of dash and glove box then remove heater core housing then core.scale of 1 to 10 this ranks about an 8.

SOURCE: how do I best replace a heater core in a corsica

You will have to drain all engine coolant.Disconnect your battery and your two heater core hoses that are on the fire wall in the engine compartment.Now inside the car start removing your dash.one dash is removed you will have to open you heater box to gain access to the heater core once you have gain access remove and replace.Now start replacing heater boxes dash board and reconnect heater core hoses and reconnect battery.Now top up your engine cooling system with the engine antifreeze drained you should have a extra jug of coolant in case you spilled or just needed it to top up.Now start car make sure coolant is full when cooling fans come on put rad cap on you have completed the replacement of your heater core.