Acura NSX 1991 Manual page 719

Compressor
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Replacement (cont'd)
9, If necessary, remove the one bolt from the idler
pulley bracket, then remove the four mounting
bolts and the compressor bracket.
IDLER PULLEY
BRACKET BOLT
COMPRESSOR
BRACKET
10. If necessary, remove the two other bolts in the idler
pulley assembly.
IDLER PULLEY
ASSEMBLY
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10 x 1,25 mm
50 N·m (5.0 kg-m,
36 Ib-ft)
10 x 1.25 mm
50 N·m (5.0 kg-m,
36 Ib-ft)
Check the idler pulley bearing for play and drag.
Replace it with a new one if it's noisy or has ex-
cessive play or drag.
46 N·m (4.5 kg-m.
33 Ib-ft)
11. Install the compressor in the reverse order of
removal; and:
If you're installing a new compressor, drain all
the refrigerant oil out of the old compressor and
measure its volume. Subtract the volume of old
Oil from 140 CC (4-2/3 floz); the result is the
amount of oil you should drain from the new
compressor (through the section fitting).
Replace 0-rings with new ones at each fitting,
and apply refrigerant oil to them.
NOTE: Be sure to use the right 0-rings for
R-134a to avoid leakage.
Use (ND-OIL 8) oil for R - 134a Nippondenso
piston type compressors only.
Do not return the oil to the container once
dispensed and never mix with other refrigerant
oils to avoid contamination.
Immediately after using the oil, replace the cap
on the container and seal it to avoid moisture
absorption.
Do not spill the refrigerant oil on the car; it may
damage the paint; if the refrigerant oil contacts
the paint, wash it off immediately.
12. Adjust the compressor belt (see page 22-88).
After adjusting the belt, tighten the idler pulley
center nut.
Then tighten the adjusting bolt securely,
13. Charge the system (see page 22-91).
14. Test system performance (see page 22-70).