Question about 1993 Pontiac Sunbird

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My 93 sunbird is leaking antifreeze from the firewall on the drivers side

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The heater core is located there just under the dash in the plastic enclosure. AC parts may also be there. Remove the heater enclosure to expose the core. You will have to disconnect the heater hoses from the engine to remove the core and enclosure. Then inspect the core for the leak, usually at a line connection.
The core can then be soldered or sent to a radiator shop for repair. You should have some expertise in repair to attempt this job on your own, otherwise take it to the shop. Some people would try radiator stop leak since the heater core is part of your cooling system, but I wouldn't recommend it. Remember to replace the anti freeze when you are done.

Posted on Dec 11, 2008

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