Service Manual

Cooling System ISB, ISBe and QSB (Common Rail [...]
Page 8-48 Section 8 - Cooling System - Group 08
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Fill the cooling system with clean water.
WARNING
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.
Operate the engine for 5 minutes with the coolant
temperature above 85°C [185°F].
Shut the engine OFF, allow to cool to 50°C [122°F], and
drain the cooling system.
If the water being drained is still dirty, the system must be
flushed again until the water is clean.