Yanmar 6BY2 - Engine

BY Service Manual
5-1
© 2009 Yanmar Marine International
BY Service Manual
Section 5
ENGINE
Page
Safety Precautions .......................................................................... 5-3
Introduction...................................................................................... 5-3
Specifications .................................................................................. 5-4
General Information................................................................... 5-4
Test and Adjustment Specifications .......................................... 5-4
Repair Specifications................................................................. 5-5
Special Torque Chart ...................................................................... 5-8
Special Service Tools.................................................................... 5-11
Measuring Instruments.................................................................. 5-12
Sealants and Compounds............................................................. 5-13
Tests and Adjustments.................................................................. 5-14
Test Compression ................................................................... 5-14
Repair............................................................................................ 5-15
Cylinder Head................................................................................ 5-16
Cylinder Head Components .................................................... 5-16
General Guidelines.................................................................. 5-17
Remove and Install Cylinder Head Cover ............................... 5-17
Remove and Install Glow Plugs............................................... 5-19
Remove Cylinder Head ........................................................... 5-19
Disassemble Cylinder Head .................................................... 5-22
Clean Cylinder Head Components.......................................... 5-24
Pressure Test the Cylinder Head ............................................ 5-24
Inspect Cylinder Head Components........................................ 5-24
Replace Valve Stem Seals...................................................... 5-25
Assemble Cylinder Head......................................................... 5-26
Determine Cylinder Head Gasket Thickness........................... 5-26
Install Cylinder Head ............................................................... 5-27