Xcm3- (Ycm3+ 20cm3) = Qcm3

A new compressor is supplied with an oil fill quantity₃₃ (Xcm ) of 100 cm . A calculated quantity of oil must be drained from a new compressor before fitting.

To calculate the quantity to be drained:

1. Remove the drain plug from the old compressor.
2. Invert compressor and gravity drain the oil into a calibrated measuring cylinder. Rotating the compressor clutch plate will assist complete draining.₃
3. Note the quantity of oil drained (Ycm )
4. Calculate the quantity of oil to be drained from the NEW compressor using the following formula:

Xcm3- (Ycm3+ 20cm3) = Qcm3

5. Remove drain plug from new compressor and₃ drain Qcm of oil. Fit and tighten compressor drain plug.

Fitting an existing compressor

When refitting an existing compressor a quantity of refrigerant oil equivalent to the amount obtained when the system was discharged must be added to the compressor.

Use only an approved refrigerant lubricating oil:

Nippondenso Denso Oil 8

Unipart SP-8

CAUTION: Do not use any other type of refrigerant oil.

Refrigerant oil easily absorbs water and must not be stored for long periods. Do not pour unused oil back into the container.

Refit

1. Position compressor to engine, fit bolts and tighten to 25 Nm.
2. Clean compressor and pipe connections.
3. Remove caps from compressor and pipe connections.
4. Lubricate 2 new ’O’ rings with refrigerant oil and fit to pipes.
5. Position air conditioning pipe unions to compressor, fit securing bolts and tighten to 17 Nm.
6. Connect multiplug to compressor.
7. Remove stand(s) and lower vehicle.
8. Refit radiator. See COOLING SYSTEM - ’KV6’, Repairs.
9. Replace receiver drier. See this section.
10. Refit air cleaner. See ENGINE MANAGEMENT SYSTEM - MEMS, Repairs.
11. Using a 25 mm spanner raise drive belt tensioner and connect belt to compressor pulley. Ensure drive belt is correctly located in pulley grooves.
12. Connect battery earth lead.
13. Recharge air conditioning system. See Adjustments.
14. Refit engine acoustic cover. See BODY, Repairs.