S-26
03-M-E3B, 03-M-DI-E3B, 03-M-E3BG WSM
DIESEL ENGINE
Thermostat Valve Opening Temperature
1. Suspend the thermostat in the water by a string with its end
inserted between the valve and seat.
2. Heating the water gradually, read the temperature when the
valve opens and leaves the string.
3. Continue heating and read the temperature when the valve
opens approx. 6 mm (0.2 in.).
4. If the measurement is not within the factory specifications,
replace the thermostat.
W1035849
Thermostat’s valve
opening temperature
Factory
spec.
D1503-M
D1703-M
D1803-M
V2003-M
V2203-M
V2403-M
V2403-M-T
D1703-M-BG
V2003-M-BG
V2003-M-T-BG
V2203-M-BG
V2403-M-BG
69.5 to 72.5 °C
157.1 to 162.5 °F
D1803-M-DI
V2403-M-DI
V2403-M-DI-T
80.5 to 83.5 °C
176.9 to 182.3 °F
Temperature at
which thermostat
completely opens
Factory
spec.
D1503-M
D1703-M
D1803-M
V2003-M
V2203-M
V2403-M
V2403-M-T
D1703-M-BG
V2003-M-BG
V2003-M-T-BG
V2203-M-BG
V2403-M-BG
85 °C
185 °F
D1803-M-DI
V2403-M-DI
V2403-M-DI-T
95 °C
203 °F