Service Manual

Coolant Thermostat Housing ISB, ISBe and QSB (Common Rail [...]
Page 8-22 Section 8 - Cooling System - Group 08
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Disassemble
Remove the three capscrews and hose connections from
the ends of the thermostat housing.
Remove the o-rings from the ends of the housing.
Remove the keel cooler hose connections.
Remove the coolant vent fitting and pipe plugs from the
housing.
Clean and Inspect for Reuse
WARNING
Wear appropriate eye and face protection when using
compressed air. Flying debris and dirt can cause
personal injury.
Clean the parts with soap and water.
Dry with compressed air.
Inspect the components for cracks, nicks, or other
damage.
Inspect the thermostat seal for damage. Replace the seal
if damaged. Refer to Procedure 008-016
Inspect the isolators for damage or cracks.
Replace any damaged parts.