The small line is the pressure side and it goes to the condenser coil in front if the radiator. The large line, the suction line goes from the evaporator coil inside the cabin to the compressor. If...
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The small line is the pressure side and it goes to the condenser coil in front if the radiator. The large line, the suction line goes from the evaporator coil inside the cabin to the compressor. If...
Yes, you hook up your device then open the valve to charge on the suction line, the big one
Those are called King Valves. IIRC, they are left hand thread. Turn to the right like you would tighten them
Generally if an access port is faulty on a R12 system, you can pull the valve core and replace it. Pretty cheap really and only requires a valve core tool that is the same as for tires. You aren't...