Yanmar 6BY2 - Introduction; Specifications; Test and Adjustment Specifications; Repair Specifications

COOLING SYSTEM
Introduction
7-4 BY Service Manual
© 2009 Yanmar Marine International
INTRODUCTION
This section of the Service Manual describes the procedures necessary to service the 4BY2 and 6BY2
marine engine cooling systems.
SPECIFICATIONS
Test and Adjustment Specifications
Note: All pressure specifications are with engine at normal operating temperature.
Repair Specifications
Special Torque Chart
Test Item Model Specification Reference Page
Cooling System Test
Pressure
All 1.4 bar (20 psi)
Pressure Test Cooling
System and Filler Cap
on page 7-7
Filler Cap Test Pressure All 1.4 bar (20 psi)
Thermostat
Marking
Begins
Opening
Fully Open
Test Thermostat on
page 7-8
All 88°C 88°C (190°F) 96°C (205°F)
Coolant Capacity (Approximate)
4BY2 10.0 L (10.6 qt)
6BY2 13.0 L (13.7 qt)
Component Torque
Lubricating Oil
Application
Reference Page
Charge Air Cooler Bolt 46 N·m (34 ft-lb) Not Applied
Remove and Install
Charge Air Cooler on
page 7-12
Anode 25 N·m (18 ft-lb) Not Applied
Check and Replace
Anodes on page 7-9