DET17
Reformed SAABaholic
- Joined
- Nov 1, 2009
- Location
- NW Georgia
Doing AC correctly is rarely quick or cheap.
Exactly. I went thru an 8 month process trying to optimize AC function of my 93 Aerostar 4.0L. Already 134a converted....and condenser replaced when my daughter took a shovel thru the grille. New OEM NOS high/low side hoses, a thorough flush using a $50 flushing tool (your local auto parts sells this tool, add compressed air). Even with proper charge, what finally put my system into proper ops was a new thermostatic clutch fan. If you cannot get the heat OUT of the condenser, your head pressures will run TOO HIGH and you'll blow things apart. It never hurts to clean the condenser which is slathered with bugs and dirt.... that heat must be removed for proper ops. Now I've got 44*F coming out of my center vents.... Oh the JOY
You could look for the 91-93 front "pusher fan" and retrofit to your system. Check the schematics but I think the power for same comes off the bus right above your battery, the harness snakes thru the grille area and connects to the pressure switch on the high side line LEAVING the condenser but before your freon expansion. Might be there, might not on an 87? Considering my experience, I'd recommend this additional fan, as the OEM fan might not have enough capacity. The TROPICAL clutch fan might be just fine however. Talk to K-jets, the expert on that fan setup.