My heater core started to leak .. and then the car stopped producing heat. The
core then stopped leaking. I had put some stop leak into the radiator. I
bought a new core from Autozone, which if you go that route, make SURE that you
put TWO extra crimps between the two spots that the manufacturer crimped the
two tubes into the upper tank. The stock unit has 3 crimps and no movement.
The core I got, the two tubes could wobble a lot .. and when assembled one
LEAKED! So .. to replace it .. its pretty easy. Oh, BTW .. when I removed my
heater core .. I could NOT blow through it. If you want to see if its clogged,
then disconnect the hoses under the hood, and hook a hose to ONE end .. and see
if you can blow through it, if NOT then its clogged and no hot water is
circulating. Mine lasted 181,000 miles. I also replaced the one in my Impala
at about 150,000. The Camaro was pretty easy, just remove the 3 screws on the
bottom of the glove box .. and pinch the inside a bit to pull out of the dash.
Then remove the two screws on the left of the HVAC box. They are pretty
obvious. Remove the cover, might take a little negotiating. You will see the
heater core. Now remove the two hoses under the dash in the engine compartment
and then remove the screw between the nipples. Then pop off the spring steel
deal that keeps the nipples separated, and the screw goes through. Now from
inside the car, remove the one screw holding the metal tab. The Heater core
will come out now. It helps if you pull the wiring down a bit to help it go by
the bottom of the dash. As the shop manual says .. reverse is installation.
Make sure that the rubber grommet in the dash doenst come out, it shouldnt as
long as you take off the spring steel deal, before pulling the core nipples (or