Suzuki RA410, Manual

Page: 349 / 761

THERMOSTAT
REMOVAL
1) Drain coolant and tighten drain plug.
2) Remove air cleaner case.
3) Remove radiator inlet hose at thermostat cap.
4) Remove thermostat cap (1).
5) Remove thermostat (2).
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.
3) Check thermostat seal (2) for breakage, deterioration or any
other damage.
1
2
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
1
3
2
ENGINE COOLING 6B-9
Thermostat functional spec.
+
1.5
5
C (2.7
5
F)
Temp. at which valve begins
to open
82
5
C (179
5
F)
Temp. at which valve be-
come fully open
95
5
C (203
5
F)
Valve lift More than 8 mm at 95
5
C