Express 2500 V8-6.6L DSL Turbo (2010)
7. Remove the 4 bolts and the thermostat housing.
8. Remove the thermostat and seals.
Inspection Procedure
1. Inspect the thermostats for sticking, cracks, and/or leakage of wax.
2. Replace the thermostats if damage is found.
3. Clean the thermostat housing and thermostat housing cover sealing surfaces.
Installation Procedure
1. Install the thermostats and seals to the thermostat housing.
The rear thermostat (4) has 2 vent valves. Install the vent valves towards the rear of the engine.
