Service Manual

ISB, ISBe and QSB (Common Rail [...] Coolant Thermostat
Section 8 - Cooling System - Group 08 Page 8-13
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Complete the following test in-chassis to test the
thermostat opening temperature.
Start the engine and monitor the water temperature with
an electronic service tool or a gauge.
Thermostat Initial Opening Temperature - Automotive
Applications without EGR
°C °F
81 MIN 178
83 MAX 182
Thermostat Initial Opening Temperature - Automotive
Applications with EGR
°C °F
86 MIN 186
89 MAX 193
Thermostat Initial Opening Temperature - Marine
Applications
°C °F
70 MIN 158
72 MAX 162
Thermostat Initial Opening Temperature - Industrial
Applications
°C °F
87 MIN 188
89 MAX 192
Shut off the engine when the coolant starts to flow.
If coolant does not start flowing into the container during
the initial opening temperature range, the thermostat
must be replaced.
Preparatory Steps
WARNING
Batteries can emit explosive gases. To reduce the
possibility of personal injury, always ventilate the
compartment before servicing the batteries. To
reduce the possibility of arcing, remove the negative
(-) battery cable first and attach the negative (-)
battery cable last.
Disconnect the batteries.Refer to Procedure 013-009.