[V8] AC Recharge Question

[cobram at juno.com]

Scott Simmons <indischrot at gmail.com> writes:
> Perhaps because the V8 uses an accumulator and orifice tube instead 
> of a  receiver drier and expansion valve?  The "cylinder" is in a 
> different spot in the two systems.  One on the high pressure liquid
line 
> before the evaporator (receiver drier) and one on the low pressure gas
line 
> after the evaporator (accumulator).
 
> Or that's how accum systems are usually set up.

It's also good to note that if you've got an expansion valve/receiver
system, you should NOT use the sight glass as an indicator if you're
using  R134.  R134 gets cloudy and sometimes the oil separates, and when
this oil or milkyness is seen through the sight glass it looks just like
air in the receiver, and could lead you into overcharging the system.

In older cars the orifice tube has definite advantages over the expansion
valve, orifice tubes don't clog as easily, no moving parts to get stuck,
and you don't have to be assume the astronaut position to get at it.  
 
BCNU,
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