Yanmar 6SY Series, Operation Manual

Page: 104 / 128

PERIODIC MAINTENANCE
96
6SY Operation Manual
1. Drain the coolant from the engine. See
Drain, Flush, and Refill the Engine
Coolant on page 97.
2. Remove the connection pipe between
upper intake manifold housings.
3. Disconnect the pipe between intake
manifold and turbocharger.
4. Disconnect inlet and outlet water lines
from charge air cooler fittings. Cap the
fittings to prevent coolant spillage.
5. Remove the upper intake manifold
housing.
Figure 18
1. Upper Intake Housing
2. Seal
3. O-Ring
4. Coolant Pipe
5. Lower Intake Manifold
6. Gasket
7. Intake Air Cooler
IMPORTANT
Take care to ensure that no
coolant spills from the element into
the intake manifold.
6. Remove the charge air cooler
assembly from the intake manifold.
IMPORTANT
Under no circumstances should
caustic soda be used to clean the
components.
7. Clean the element using
paraffin-based engine detergent only.
8. Clean and degrease the sealing
surfaces on the upper and lower intake
manifold housing.
9. Install charge air cooler(s) using a new
gasket. Tighten bolts to 20 N·m
(177 in.-lb).
10. Install upper intake manifold(s).
Tighten bolts to 50 N·m (37 ft-lb).
A
CAUTION
COOLANT HAZARD!
• Wear eye protection and
rubber gloves when you
handle Long Life engine
coolant. If contact with the
eyes or skin should occur,
flush eyes and wash
immediately with clean water.
• Failure to comply may result in
minor or moderate injury.
0000005enMarine
CAUTION
NEVER clean the coolant system
with caustic soda. The aluminum
parts may be damaged.
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