B3.9 and B5.9 Series Engines
Coolant Heater (008-011)
Section 8 - Cooling System - Group 08
Maintenance Check (008-011-008)
When operating, the engine block or oil pan heater should
make a sound and the adjacent parts should be warm to the
Coolant is toxic. If not reused, dispose of in accordance
with local environmental regulations.
Cylinder Block Water Heater
Drain at least 19 liters [5 gal] of coolant. Refer to
Disconnect the block heater electrical cord.
Loosen the block heater retaining nut.
Remove the block heater from the block.
Clean the core plug hole thoroughly. Make sure there are
no burrs or sharp edges that can cut the o-ring.