THERMOSTAT
REMOVAL
1) Drain coolant and tighten drain plug.
2) Remove air cleaner case together with air inlet hose.
3) Remove thermostat cap (1) with air cleaner case bracket.
4) Remove thermostat (2) and gasket.
F8B engine
F8D engine
INSPECTION
1) Make sure that air bleed valve (1) of thermostat is clean.
Should this valve be clogged, engine would tend to overheat.
2) Check to make sure that valve seat is free from foreign matters
which would prevent valve from seating tight.
4) Check thermostatic movement of wax pellet as follows:
(1) Immerse thermostat in water, and heat water gradually.
(2) Check that valve starts to open at specific temperature.
(3) If valve starts to open at a temperature substantially below
or above specific temperature, thermostat unit should be re-
placed with a new one. Such a unit, if reused, will bring about
overcooling or overheating tendency.
1. Thermostat
2. Thermometer
3. Heater
ENGINE COOLING
6B-9
Thermostat functional spec.
1.5
C (2.7
F)
Temp. at which valve begins
to open
82
C (179
F)
Temp. at which valve be-
come fully open
95
C (203
F)
Valve lift
More than 8 mm at 95
C
