The O.E. installed at the factory had no protective coating on the Aluminum
core...AND rotted from the outside inwards.

(Some one will be along momentarily, if I'm wrong, to correct me.)

Screw the Aluminum...If you can get your hands on a Copper EVAP jump on it!

You'll only have to replace it once in a lifetime,then.

Jimmy,

Since you're doing the EVAP ...1.pressure test the Heater Core before you close
up that dash! 2.Replace ALL the air control vacuum operated pods while you're
in there(You will not be sorry)3.Might as well put in a Parallel Condenser and
improve the heat transfer rate by 30%.

__________________
'84 300SD sold
124.128