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Filters at Expansion Valves

14K views 6 replies 4 participants last post by  dave00  
#1 ·
I have what seems like a failed rear expansion valve, so I'll be replacing it shortly. It looks like the rear expansion valve uses a filter on the high pressure line, which I plan on replacing. Can anyone confirm a part number for this filter? It doesn't show up on the GM parts fiche.

Can anyone also confirm if there's a similar filter at the front expansion valve as well? I can't seem to find that on the parts diagrams either.

Any help would be appreciated.
 
#2 ·
I think I know what youre talking about...I remember seeing a video a while back...




look here--someone unclogged their filter.




@ 2:23 and 3:05


 
#7 ·
Real question is why was all that crap in the filter? I've worked on AC systems on several different cars replacing Evap cores, Compressors, Condensers, TEV's and Orifice Tubes and never seen crap like in that video. The owner must have put some sort of leak seal in there as a last ditch effort and it clogged the filter. Typically you will see crap in a line when the compressor fails and has the black death all throughout the lines - including condenser and evap core, but that was weird. Also, the filter is new to me as I've never seen one installed on a vehicle from the factory as it's always just the TEV or O-tube and that's it.