Previously posted problem and GM Tech responded with TSB solution. In the TSB it says to add inline filter. Recently purchased filter from AMA and was wondering if anyone has installed this on said vehicle? While searching other AC-related TSBs, the filter is to be placed before the Y block on dual systems. Another post shows this Y block location. Really nothing definitive on installing this type filter in the forum and is why I ask again.
As stated, wondering if anyone has installed this filter on early nineties Suburban and willing to offer up some tips? From what I can see, the line would need be removed or at least pulled out enough to get to a section of tubing that could be prepared for the filter. Even with that, that would place the filter between the radiator and radiator support; an awkward, inaccessible position.
The only other way I see to do it is to to install a filter on each circuit somewhere on the lines after the Y block. Probably have to place a filter at the orifice tube location and run the orifice in the filter and somewhere on the rear line in same vicinity.
Short of this, is the filter really needed? Other AC-related TSBs not only say's to install the filter, but a suction screen as well. There are opinions and observations here that say these items are not needed, well the filter anyway.
Project update. When I got the refrigerant recovered, the recovery/charging machine pulled out .59lbs and an ounce of oil. So, yeah there's a leak somewhere. I pulled the orifice tube and it was fairly clean considering it was the original and the system has never been opened in 15 years. I noticed a small amount of debris that looked like super thin rubber pieces and two small flecks of obvious metal. The debris was collected at top of long screen, just under the shoulder where the o-ring is.
Again, thanks in advance.
Edited: Fri July 23, 2010 at 10:27 AM by SeppW
My suggestion would be placing it between the condenser and the Y in the liquid line.
You would need to splice it in and that is why they supply the compression fittings. Should not be that hard to remove the line to have access for a pipe cutter and installation of the filter.
Got my stuff from AMA earlier in the week. That filter is much bigger than it looked, but should fit. Yeah, had to remove the line. A major, major PITA. Had to remove air box assy, battery, and battery tray. unfortunately, the orifice flare nut and fitting were galled (?), but I managed to get it separated. There is some thread damage, but could probably be used. However, I'll go ahead and replace the line while it's out. Fortunately, as a dealer item, it's not terribly expensive. $56 and some change.
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