Coolant Thermostat Housing (008-014)
B3.9 and B5.9 Series Engines
Section 8 - Cooling System - Group 08
Install the drive belt. Refer to Procedure 008-002.
NOTE: After the belt tensioner has been raised to remove/
install the belt, check the torque of the tensioner capscrew.
Always vent the engine and aftercooler during filling to
remove air from the coolant system, or overheating will
Fill the cooling system. Operate the engine, and check for
Coolant Thermostat Housing
Refer to Procedure 008-013 for coolant thermostat and
Cooling System (008-018)
Initial Check (008-018-001)
Do not remove the pressure cap from a hot engine. Wait
until the coolant temperature is below 50°C [122°F]
before removing the pressure cap. Heated coolant spray
or steam can cause personal injury.
NOTE: Never use a sealing additive to stop leaks in the
coolant system. This can result in coolant system plugging
and inadequate coolant flow, causing the engine to over-
The coolant level must be checked daily.