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ENGINE 273 MPFI
169
ENGINE
PROCEDURE FOR COOLANT DRAIN FOR
TATA NANO (HVAC VERSION)
Requirements :
Regulated air supply at 1 bar (gauge)
pressure.
Please follow the below described procedure step-by-
step;
1) Position the vehicle on a horizontal level ground /
surface / car lift.
2) Allow the engine to cool down close to ambient
temperature.
3) Open the radiator pressure cap (Fig. A) & loosen
the radiator drain plug (Fig. B) to drain the coolant
in the suitable vessel/tray.
5) Disconnect the recovery bottle vent hose at the
radiator filler neck side (Fig. D) and drain the coolant
from recovery bottle in the suitable vessel/tray.
4) Loosen the de-aeration port (Fig. C) located near
the heater which can be accessed by opening the
bonnet at the front of vehicle to drain further coolant
from HVAC circuit through radiator drain plug.
6) Tighten the radiator pressure cap and also re-
connect the recovery bottle vent hose.
7) Remove the de-aeration vent plug fromHVAC de-
aeration port and fit the special adaptor as shown
in (Fig. E) on the de-aeration port for applying
compressed air to drain coolant fromHVAC circuit.
Fig. A
Fig. B
Fig. D
Fig. C