Join Date: Aug 1999
Location: Ontario, Canada
Hey No problem, It only took all summer,
Went south for vacation, picked up one of those kits from K-Mart, three cans and a can of oil, Had the system evacuated for 3/4 hour, then we undid a few hose and flushed the system with an AC cleaner, evacuated again .5 hour, filled the system with the three cans from the kit.
the kit includes an adapter for R-134 hose hook up, we could only use the low side, as the high side adapters did not fit.
The guy that helped me with it had an old set of gauges so we had the old set hooked into the high side and the R-134 machine hooked into the low side.
Every thing worked pretty good, for that summer, but not really cold, still had some warm air blowing from the heater.
Looked at the schematic for the system, figured out that there are a couple of doors, that are vacumm activated, I don't remember hooking up a vacumm hose when I put the motor in.
Found the resovoir under the Left fender, hooked up a vacumm source, got both doors working now.
Now I cannot get any Cold, the AC line from the POA to Compressor is frosting up ( Low side) WHY WHY WHY?????
Get a thousnad might be this might be that opinions, get pissed off, found a small leak at the hose into condensor, Thats it, tear the whole system apart and check every thing......
Have new hoses made up, with new seals and fittings, Comb the condensor fins, Order new expansion valve, ( Two different styles are used on the 68) find out that the nut inlet side of the evaporator is stripped, pull the evaporator box apart, on the blow side all kinds of leaves and crap fall out, Order NOS evaporator from AC Delco dealer, put every thing back together, evacuate and recharge system, 2.75 lbs of R-134 is all you need,
I think we put in 4 or 6 ozs. of oil,
Man does it blow cold air now, Since the 68 heater core stays HOT all of the time I was still getting a mix of warm and cold when running down the highway.
I tee into the vacumm hose controlling the right kick panel door, Vacumm present on Maximum Cold, run it out to the engine compartment and install a water valve that shuts flow OFF with vacumm applied,
Now I have good cold AC,
If only I can get rid of the damm Wind whistles with the windows up.
Any More ????