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Originally Posted by 1991300SEL
The sight glass(if there is one) on 134 systems doesn't carry as much meaning as it does on an R12 system. 134 sight glass can appear foamy and be functioning just fine.
You need to hook up some 134 gauges and look at the pressures in the heat of the day. If you don't have the gauges, a shop should do it for an hrs. labor.
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With the A/C system off the sight glass shows nothing... with the system on it shows a greyish foglike flow... I'm assuming that that is the RJ134 coolant, but I'm not sure.
Sincerely,
Tommy Darcy
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'82 300D (Turbo) c300k miles, "Mary."