Components Overview
NOTE:
- Replacement A/C compressors supplied by the Parts Department are filled with 250 cc (8.5 fl oz) of A/C refrigerant (PAG) oil. This is the total A/C system refrigerant oil capacity.
- DO NOT top-off a charged refrigerant system. Instead, discharge, evacuate and recharge system.
- For A/C refrigerant system capacities, Capacity Specifications
- Only use new O-rings specified for use with R-134a.
- O-ring and torque specifications also apply to threaded connections in the A/C lines.
1 - Compressor (Zexel)
Low pressure connection:
- O-ring size: 17.2 mm inside diameter, 1.8 mm thickness
- Tightening torque: 40 Nm (30 ft lb)
High pressure connection:
- O-ring size: 14.0 mm inside diameter, 1.8 mm thickness
- Tightening torque: 30 Nm (22 ft lb)
CAUTION!
- Mark travel direction of ribbed drive belt before removing. Reversing direction could cause the belt to fail.
- If a new A/C compressor is installed, or if oil was added to compressor, manually rotate compressor 10 times before operating the system to prevent compressor damage.
NOTE:
- The variable displacement A/C compressor varies piston stroke and out-put depending on load requirements and suction pressure.
NOTE:
- Ensure A/C compressor refrigerant lines are properly insulated from exhaust system heat.
2 - A/C compressor speed sensor -G111-
- O-ring size 1): 15.5 mm inside diameter, 1.5 mm thickness
CAUTION!
Discharge A/C system before removing A/C compressor speed sensor -G111-.
3 - A/C clutch -N25-
4 - Oil drain plug
- O-ring size 1): 7.8 mm inside diameter, 1.9 mm thickness
- Tightening torque: 10 Nm (7 ft lb)
NOTE: Only remove drain plug with compressor removed from vehicle. Use drain plug to drain/add oil to compressor and to check amount of oil in compressor.
5 - Pressure relief valve
- O-ring size 1): 8.8 mm inside diameter, 1.9 mm thickness
- Tightening torque: 10 Nm (7 ft lb)
CAUTION!
Discharge A/C system before removing pressure relief valve.
6 - Connection with Schrader valve
- For A/C refrigerant high pressure switch -F118-
7 - A/C refrigerant high pressure switch -F118-
- O-ring size: 7.6 mm inside diameter, 1.8 mm thickness
- Tightening torque: 5 Nm (44 in lb)
- Switches A/C clutch OFF if system pressure is too high
- Switch identification: red housing with bonded wire connections
Switching pressures:
- Opens (compressor OFF): 28.2 - 31.0 bar (409 - 450 psi)
- Closes (compressor ON): 10.3 - 17.2 bar (149 - 250 psi)
8 - Condenser
Intake connection:
- O-ring size: 14.0 mm inside diameter, 1.8 mm thickness
- Torque: 30 Nm (22 ft lb) Outlet connection:
- O-ring size: 10.8 mm inside diameter, 1.8 mm thickness
- Torque: 15 Nm (11 ft lb)
9 - Service valve (high pressure)
- Used for checking system pressure, discharging, evacuating and recharging system
- Mounted on front of condenser
10 - Cap, with seal
- Always reinstall over valve
11 - Connection with Schrader valve
- For A/C refrigerant high pressure switch -F23-
12 - A/C refrigerant high pressure switch -F23-
- Switches coolant fan -V7- to 2nd speed operation.
- Switch identification: green housing with bonded wire connections
- O-ring size: 7.6 mm inside diameter, 1.8 mm thickness
- Torque: 5 Nm (44 in lb)
Switching pressures:
- Closes (coolant fan 2nd speed ON): 14.2 - 17.4 bar (206 - 252 psi)
- Opens (coolant fan 2nd speed OFF): 11.7 - 15.0 bar (170 - 218 psi)
- Opening and closing switching points must be at least 2 bar (29 psi) difference
13 - Restrictor
- O-ring size: 7.5 mm inside diameter, 1.5 mm thickness
- Intake connection O-ring size: 10.8 mm inside diameter, 1.8 mm thickness
14 - Evaporator
Intake connection:
- O-ring size: 10.8 mm inside diameter, 1.8 mm thickness
- Torque: 15 Nm (lift lb)
Outlet connection:
- O-ring size: 17.2 mm inside diameter, 1.8 mm thickness
- Tightening torque: 40 Nm (30 ft lb)
NOTE: Do not disassemble evaporator and housing.
15 - A/C refrigerant low pressure switch -F73-
- O-ring size: 8.9 mm inside diameter, 1.8 mm thickness
- Tightening torque: 5 Nm (44 in lb)
- Switches A/C clutch -N25- OFF if system suction pressure is too low (low refrigerant charge).
Switching pressures:
- Opens (compressor OFF): 1.45 - 1.6 bar (21 - 23 psi)
- Closes (compressor ON): 2.9 - 3.4 bar (42 - 49 psi)
16 - Connection with Schrader valve
- For A/C refrigerant low pressure switch -F73-
17 - Accumulator
Intake connection:
- O-ring size: 17.2 mm inside diameter, 1.8 mm thickness
- Tightening torque: 40 Nm (30 ft lb)
Outlet connection:
- O-ring size: 17.2 mm inside diameter, 1.8 mm thickness
- Tightening torque: 40 Nm (30 ft lb)
18 - Connection with Schrader valve
19 - Cap, with seal
- Always reinstall over valve
1) Original equipment O-ring maybe black in color. When replacing, use O-ring specified by the parts catalog microfiche.