checking / charging AC

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Jul 5, 2019 | 05:53 PM

JD1964

Thread Starter

Burning Brakes

Joined: Apr 2014

Posts: 829

Likes: 191

checking / charging AC

96 LT1

The AC was not working very well when we bought the car years ago and I added some 134 and it improved to the "acceptable" level. I was going blind without proper gauge set though. I have since acquired full manifold set. When I hook up the gauge set, what kind of pressures should I be looking for in a properly operating system? Should I hook and check both high and low sides?

Thanks

Jul 5, 2019 | 06:00 PM

BLUE1972

Race Director

Joined: Oct 2008

Posts: 19,135

Likes: 1,667

From: Long Island

Get a copy of the service manual, also servicing the A/C is temperature dependent.

If you want to get close - watch a U Tube Vid and compensate for the temperature.

Jul 5, 2019 | 08:12 PM

65Z01

Team Owner

Joined: Dec 2000

Posts: 90,675

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From: SE NY

Cruise-In II Veteran

Indeed pressures/ranges are quite dependent on environmental conditions along with type of refrigerant; refer to available charts on A/C.

Jul 5, 2019 | 08:44 PM

xrav22

Drifting

Joined: Mar 2013

Posts: 1,952

Likes: 239

From: Venice Cali.

This chart worked for my cars.

Jul 28, 2019 | 04:35 PM

JD1964

Thread Starter

Burning Brakes

Joined: Apr 2014

Posts: 829

Likes: 191

I found a leak. It's the pressure switch in the suction line (low side). The fitting on the switch has a tiny crack. Is this the low pressure cut off switch? If not, what's it called so I can order a new one? Thanks

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