Re: 96 GC suddenly lost AC cooling
 

Hikers did pass the time by typing:
> Thanks DougW. Checked out your LED turn signal add ons on you site, Nice.
>
> System is manual AC. Low side pressure is 65 when engine is off. Cycles from
> 10 - 45 w/AC on. Clutch kicks in when pressure hits 45 then as it begins to
> drop clutch stops. This is all of about 5 -7 seconds.
> Fan pushes air well and heat settings work fine.

Measuring from the low-side is tricky. The recommended method is
measuring the high side, drain and fill, or temperature difference
on the evaporator feed and return lines.

40-50 PSI low-side is "normal" for most cars.

The only guides I have are for the high pressure side.

Ambient Temp Compressor discharge pressure
60 F 220 psi
70 F 240 psi
80 F 260 psi
90 F 300 psi

And temperature differences between evaporator inlet and outlet
should be 8-10 F (5-6 C) with the outlet colder than inlet.


--
DougW

Re: 96 GC suddenly lost AC cooling
 

Hikers did pass the time by typing:
> Thanks DougW. Checked out your LED turn signal add ons on you site, Nice.
>
> System is manual AC. Low side pressure is 65 when engine is off. Cycles from
> 10 - 45 w/AC on. Clutch kicks in when pressure hits 45 then as it begins to
> drop clutch stops. This is all of about 5 -7 seconds.
> Fan pushes air well and heat settings work fine.

Measuring from the low-side is tricky. The recommended method is
measuring the high side, drain and fill, or temperature difference
on the evaporator feed and return lines.

40-50 PSI low-side is "normal" for most cars.

The only guides I have are for the high pressure side.

Ambient Temp Compressor discharge pressure
60 F 220 psi
70 F 240 psi
80 F 260 psi
90 F 300 psi

And temperature differences between evaporator inlet and outlet
should be 8-10 F (5-6 C) with the outlet colder than inlet.


--
DougW

Re: 96 GC suddenly lost AC cooling
 

Hikers did pass the time by typing:
> Thanks DougW. Checked out your LED turn signal add ons on you site, Nice.
>
> System is manual AC. Low side pressure is 65 when engine is off. Cycles from
> 10 - 45 w/AC on. Clutch kicks in when pressure hits 45 then as it begins to
> drop clutch stops. This is all of about 5 -7 seconds.
> Fan pushes air well and heat settings work fine.

Measuring from the low-side is tricky. The recommended method is
measuring the high side, drain and fill, or temperature difference
on the evaporator feed and return lines.

40-50 PSI low-side is "normal" for most cars.

The only guides I have are for the high pressure side.

Ambient Temp Compressor discharge pressure
60 F 220 psi
70 F 240 psi
80 F 260 psi
90 F 300 psi

And temperature differences between evaporator inlet and outlet
should be 8-10 F (5-6 C) with the outlet colder than inlet.


--
DougW

Re: 96 GC suddenly lost AC cooling
 

DougW. Thanks for the addl info. I don;t have the guages and fitting to test
high side. Looks like it is time for a trip to the shop. Good thing the
temps here have been in the 70s to low 80s. Use the 460 AC this week.
Thanks again. Hikers
"DougW" <post.replies@invalid.address> wrote in message
news:wnk_c.4734$OZ6.3135@okepread06...
> Hikers did pass the time by typing:
> > Thanks DougW. Checked out your LED turn signal add ons on you site,
Nice.
> >
> > System is manual AC. Low side pressure is 65 when engine is off. Cycles
from
> > 10 - 45 w/AC on. Clutch kicks in when pressure hits 45 then as it begins
to
> > drop clutch stops. This is all of about 5 -7 seconds.
> > Fan pushes air well and heat settings work fine.
>
> Measuring from the low-side is tricky. The recommended method is
> measuring the high side, drain and fill, or temperature difference
> on the evaporator feed and return lines.
>
> 40-50 PSI low-side is "normal" for most cars.
>
> The only guides I have are for the high pressure side.
>
> Ambient Temp Compressor discharge pressure
> 60 F 220 psi
> 70 F 240 psi
> 80 F 260 psi
> 90 F 300 psi
>
> And temperature differences between evaporator inlet and outlet
> should be 8-10 F (5-6 C) with the outlet colder than inlet.
>
>
> --
> DougW
>
>

Re: 96 GC suddenly lost AC cooling
 

DougW. Thanks for the addl info. I don;t have the guages and fitting to test
high side. Looks like it is time for a trip to the shop. Good thing the
temps here have been in the 70s to low 80s. Use the 460 AC this week.
Thanks again. Hikers
"DougW" <post.replies@invalid.address> wrote in message
news:wnk_c.4734$OZ6.3135@okepread06...
> Hikers did pass the time by typing:
> > Thanks DougW. Checked out your LED turn signal add ons on you site,
Nice.
> >
> > System is manual AC. Low side pressure is 65 when engine is off. Cycles
from
> > 10 - 45 w/AC on. Clutch kicks in when pressure hits 45 then as it begins
to
> > drop clutch stops. This is all of about 5 -7 seconds.
> > Fan pushes air well and heat settings work fine.
>
> Measuring from the low-side is tricky. The recommended method is
> measuring the high side, drain and fill, or temperature difference
> on the evaporator feed and return lines.
>
> 40-50 PSI low-side is "normal" for most cars.
>
> The only guides I have are for the high pressure side.
>
> Ambient Temp Compressor discharge pressure
> 60 F 220 psi
> 70 F 240 psi
> 80 F 260 psi
> 90 F 300 psi
>
> And temperature differences between evaporator inlet and outlet
> should be 8-10 F (5-6 C) with the outlet colder than inlet.
>
>
> --
> DougW
>
>

Re: 96 GC suddenly lost AC cooling
 

DougW. Thanks for the addl info. I don;t have the guages and fitting to test
high side. Looks like it is time for a trip to the shop. Good thing the
temps here have been in the 70s to low 80s. Use the 460 AC this week.
Thanks again. Hikers
"DougW" <post.replies@invalid.address> wrote in message
news:wnk_c.4734$OZ6.3135@okepread06...
> Hikers did pass the time by typing:
> > Thanks DougW. Checked out your LED turn signal add ons on you site,
Nice.
> >
> > System is manual AC. Low side pressure is 65 when engine is off. Cycles
from
> > 10 - 45 w/AC on. Clutch kicks in when pressure hits 45 then as it begins
to
> > drop clutch stops. This is all of about 5 -7 seconds.
> > Fan pushes air well and heat settings work fine.
>
> Measuring from the low-side is tricky. The recommended method is
> measuring the high side, drain and fill, or temperature difference
> on the evaporator feed and return lines.
>
> 40-50 PSI low-side is "normal" for most cars.
>
> The only guides I have are for the high pressure side.
>
> Ambient Temp Compressor discharge pressure
> 60 F 220 psi
> 70 F 240 psi
> 80 F 260 psi
> 90 F 300 psi
>
> And temperature differences between evaporator inlet and outlet
> should be 8-10 F (5-6 C) with the outlet colder than inlet.
>
>
> --
> DougW
>
>