COOLING SYSTEM
BY Service Manual
7-5
Introduction
INTRODUCTION
This section of the Service Manual describes the procedures necessary to service the 4BY and 6BY
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
Inspection Item Model Specification Reference Page
Cooling System Test
Pressure
All 1.4 bar (20 psi)
See Pressure Testing
Cooling System and
Filler Cap on page 7-8
Filler Cap Test Pressure All 1.4 bar (20 psi)
Thermostat
Marking
Begins
Opening
Fully Open
See Testing
Thermostat on
page 7-9
All 88°C 88°C (190°F) 96°C (205°F)
Coolant Capacity (Approximate)
4BY 10.0 L (10.6 qt)
6BY 13.5 L (14.3 qt)
Component Torque
Lubricating Oil
Application
Reference Page
Charge Air Cooler Bolt 46 N·m (40 ft-lb) Not Applied
See Remove and Install
Charge Air Cooler on
page 7-14
Zinc Anode 25 N·m (18 ft-lb) Not Applied
See Check and Replace
Zinc Anodes on
page 7-11
To Next Page
General
