92 Oldsmobile cutlass supreme A/C evaporator replacement

[Ian]

Hello

if this has been posted already it would be greatly appreciate if someone can share a link to how to replace the ac evaporator in my 92 . It’s so packed full of junk it hardly blows any air and blew out the seal at the bottom so clearly I need to remove and clean it out. &nbsp
 

[Schurkey]

The Genuine GM service manual set for your vehicle is your friend.

First Guess:  If you can get in there from the HVAC blower-motor area with a vacuum, and perhaps compressed-air on a long, thin nozzle, you don't have to take the evaporator OUT.  Then the A/C system doesn't have to be discharged, desiccant pouch replaced, (new accumulator) system evacuated, and re-charged.  IF (big IF) the system is still leak-free, you aren't disturbing any of the seals.

OTOH, it's a pain in the tuckus to REALLY clean an evaporator.  But it's probably even worse to replace one.  Good luck.

If you do have to open the refrigerant system, be sure to replace the desiccant, and be sure to replace EVERY O-RING IN THE SYSTEM.  And have a careful look at the condenser for leaks and folded-over air fins.  Might be a good idea to just upgrade the condenser while the system is apart.  Remove and examine the orifice tube--any debris, and you need a compressor, too.  Flush every part you intend to re-use (except the compressor) and use the correct oil for the refrigerant you're using--in '92, that'd be R12 as OEM.  So again, "good luck".

Edited 3 hours ago by Schurkey