Re: A/C 5k

["R. Cummings" <cumm@flash.net>]

Avi Meron corrected me on the A/C system in the 5k when he wrote:
>
>it has an accumulator (it's a GM system), the accumulator is on the LOW
>side of the refrigerant loop.....
>Avi
>
So if Ted is still poking around under the hood, here is what he should look
for. A small diameter tube runs from the condenser to a connection just
before the tube goes into the passenger compartment and connects to the
evaporator. Inside that connection is an orifice tube. With the compressor
running, the pipe from the condenser to the orifice tube should be warm to
hot and from the orifice to the evaporator should be very cold. The large
diameter pipe from the evaporator comes out of the passenger compartment and
connects to the accumulator (looks like a receiver/dryer but is fatter). A
large diameter line then goes from the accumulator to the compressor. To
check for low charge: with the compressor running, the temperature of the
accumulator should be very cold and in fact, as cold or colder than the
small pipe after the orifice tube. If the accumulator is warmer than the
evaporator inlet pipe, the system is low on charge.

Since my coupe has a TXV system I assumed the 5k did too. But I do remember
that Audi used GM components way back in the early seventies when they used
the VIR (valves in receiver)for refrigerant control.

BTW Audial, if people quip talking about fixing Audis, what will they talk
about?

Bob Cummings
87 Coupe GT