Compressor Oil Balancing

Draining Procedure

Important: Drain and measure as much of the refrigerant oil as possible from the removed compressor.

1. Drain the oil from both the suction and discharge ports of the removed compressor into a clean, graduated container. Rotate the compressor shaft to assist in draining the compressor.

2. Measure and record the amount of oil drained from the removed compressor. This measurement will be used during installation of the replacement compressor.
3. Properly discard the used refrigerant oil.

Balancing Procedure

1. The Denso replacement compressor is shipped with 74 ml (2.5 oz) of refrigerant oil.

Important: The refrigerant oil in the A/C system must be balanced during compressor replacement.

2. Before installing the compressor, the refrigerant oil will have to be fully drained.
3. Add back the same quantity of PAG oil as drained from the removed compressor.
Refer to the amount of refrigerant oil recorded during the compressor removal.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Procedures

Use the Manual With the Right Hardware

When to See a Mechanic

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