Service Manual

ISB, ISBe and QSB (Common Rail [...] Coolant Return Junction Block
Section 8 - Cooling System - Group 08 Page 8-119
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If the sea water temperature difference is less than 3°C
[5°F], check the heat exchanger for possible plating to the
heat exchanger core. Excessive plating or coating to the
inside or outside of the cooling tubes will effect the
efficiency of the heat exchanger. Refer to Procedure
008-053
Coolant Return Junction Block
(008-113)
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.
WARNING
Coolant is toxic. Keep away from children and pets. If
not reused, dispose of in accordance with local
environmental regulations.
WARNING
Do not remove the pressure cap from a hot engine.
Wait until the coolant temperature is below 50°C
[120°F] before removing the pressure cap. Heated
coolant spray or steam can cause personal injury.
CAUTION
Use caution when draining the coolant system that
coolant is not spilled or drained into the bilge area.
The coolant must be disposed of in accordance with
local environmental regulations.
• Disconnect the batteries. Refer to Procedure 013-009
• Drain the engine coolant. Refer to Procedure 008-018
Remove
Remove the turbocharger water drain line from the
coolant return junction.