You picked an extremely difficult one.......It would be best to get a Chilton's or Haynes for this. I will tell you that it requires pulling the passenger side fender and inner fender well to gain access to it. Some of the later models....such as your '79 have an impression in the fender well that you can cut and bend down to gain access. When done, you bend it back up and seal it.
Begin by removing the water supply hoses to your heater core. Remove the heater core retaining bolts. The heater core will come out. Reverse the process to install the new heater core.
Remove the heater core water supply hoses from your 1979 Chevy Corvette. Remove the heater core retaining bolts. Reverse the process to install the new heater core.
Remove the water supply lines to your 1985 Pontiac Trans Am heater core. Remove the heater core retaining bolts. The heater core will come out. Reverse the process to install your new heater core.
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The heater matrix, in a Peugeot 206, can be replaced by removing the heater core and the hoses. With the heater core removed you can replace it with a new heater core.
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