1975 Datsun 280z FSM - Spooled up Racing

1. Drill holes in dash panel for hoses
and tubes.
(1) Remove grommet cover and
grommet for refrigeration piping. See
Figure AC-63.
Discard grommet, saving grommet
cover for future use.
Remove blind grommet for vacuum
hose. See Figure AC-63.
AC562
Fig. AC-63 Grommet
(2) Drill holes in dash panel insulator
from the passenger compartment
side. Remove the round cutout from
the insulator. See Figure AC-64.
Air Conditioning
3. Installation of evaporator housing
(1) Install evaporator housing and
control assembly, which have been
previously assembled in a unit, onto
the heater unit. To do this, hook a
heater unit upper bracket to the
dimple in evaporator housing and securely
tighten the two bolts at the
lower side of evaporator housing. See
Figure AC-52.
(2) Connect wiring connectors of air
conditioner sub harness to those of
control assembly (4 connectors), and
to dash harness at one connector. Two
connectors, one for blower motor and
the other for resistor, may be left
unconnected. See Figure AC-56.
(3) Connect control cables (heater
door cable and water cock cable) to
the respective levers on heater unit.
Refer to "Adjustment of Control
Cable" in "Control Assembly".
(4) Arrange vacuum hose piping
Install all hoses leading to vacuum
water cock, on heater unit and to
vacuum selector on control assembly,
referring to Figure AC-55.
Also install a hose leading from
vacuum source into engine compartment
through panel.
Secure vacuum hoses and air conditioner
sub-harness to water cock control
cable with clip.
(5) Install a fixture bracket to fix
two tubes leading to the inlet and
outlet of evaporator onto the side of
heater unit, and secure it with two
bolts. Seal the clearance between tube
and dash panel using grommet and
grommet cover.
Note: Do not remove the blind plug
from the opening of evaporator
tube until ready for piping in the
engine compartment.
(6) Install drain hose on the bottom
of evaporator housing and direct its
end under the car through floor panel.
Seal the clearance between hose and
floor panel with grommet.
(7) Install two instrument panel
center stays.
4. Installation of blower housing
(1) Install blower housing previously
modified for use with air conditioner
onto dash panel with three bolts.
(2) Install vacuum hose to air intake
door actuator. See Figure AC-55.
(3) Connect two wiring connectors,
one for blower motor and the other
for resistor, with those on air conditioner
sub harness. See Figure AC-56.
AC563
Fig. AC-64 Dash insulator
(3) Remove blind grommet for drain
hose.
2. Installation of heater unit
(1) From passenger seat side set
heater unit modified for use with air
conditioner in place below instrument
panel. Fit it securely in place by
tightening two nuts from the engine
compartment side and four bolts from
the passenger compartment side. See
Figure AC-54.
(2) From the engine compartment
side seal the pass-through holes using
grommet and grommet cover. Connect
two heater hoses to the connectors
protruding inside the engine room.
AC-61
AC321
Fig. AC-65 Floor grille and duct