Automotive Air Conditioning Information Forum (Archives)

Provided by

We've updated our forums!
Click here to visit the new forum

Archive Home

Search Auto AC Forum Archives

78 Evaporator core

jbratu on Mon February 11, 2008 7:24 PM User is offline

Year: 1978
Make: Chevy
Model: Corvette
Engine Size: 350
Country of Origin: United States

Hi guys, hope somebody can help. I have a 78 Corvette that all the ac was ripped out of except the ac box on the firewall. I plan on reinstalling everything and getting it working again. I pulled the ac box and before I put it back I wanted to know if I needed to change the evaporator core. It is the original core and it looks clean, no signs of leaks or build up. Both lines were left open by the previous owner and they have some dirt and crap inside of them. Can I clean this core and reinstall or do I need to get a new one? My thinking was it was 30 year old core, but another guy told me that very seldom do the cores in these cars go bad. If I can clean it, what can I use to clean it with?

Chick on Mon February 11, 2008 7:38 PM User is offlineView users profile

While they usually don't go bad on those, the price on brand new evap core would eliminate the possibility of installing all the parts just to find out that the old one corroded over the years (being empty and exposed to the elements) But if you choose to flush it, use either commercial flushing agents, brake parts cleaner or even lacquer thinner, and PLENTY of air to blow out the oil and other contaminates and get it dry. Any residual flush in the system will degrade the oil, and down the road you risk compressor failure.. The way evaporators are made make them harder to flush than other components. So plenty of air, then do it again..Or just go for a new one while you have it out already... Hope this helps..

PS: Use a flush that evaporates clean, leaving no residue behind. Test it on a clean piece of glass, if it leaves spots after it evaporates, it will leave residue in the system....

Email: Chick


Freedoms just another word for nothing left to lose

Back to Automotive Air Conditioning Forum

We've updated our forums!
Click here to visit the new forum

Archive Home

Copyright © 2016 Arizona Mobile Air Inc.