Introduction; Cylinder Head Specifications; Adjustment Specifications; Cylinder Head - Yanmar 3TNV82A Service Manual

ENGINE

INTRODUCTION

This section of the Service Manual describes servicing of the engine.

CYLINDER HEAD SPECIFICATIONS

Adjustment Specifications

Model
All except 4TNV106, 4TNV106T
4TNV106, 4TNV106T

Cylinder Head

Inspection Item
Combustion Surface Distortion (Flatness)
3TNV82A
(2-Valve Head)
3TNV84, 3TNV84T,
3TNV88, 4TNV84,
4TNV84T, 4TNV88
(2-Valve Head)
4TNV84T (4-Valve
Valve Recession
Head)
4TNV94L, 4TNV98,
4TNV98T
(4-Valve Head)
4TNV106, 4TNV106T
(4-Valve Head)
Seat Angle
Valve Seat
(2-Valve, 4-Valve)
Seat Correction Angle
6-6
Valve Clearance
0.006 - 0.010 in.
(0.15 - 0.25 mm)
0.010 - 0.014 in.
(0.25 - 0.35 mm)
Standard
0.0020 in.
(0.05 mm) or less
0.0138 - 0.0217 in.
Intake
(0.35 - 0.55 mm)
0.0118 - 0.0197 in.
Exhaust
(0.30 - 0.50 mm)
0.0118 - 0.0197 in.
Intake
(0.30 - 0.50 mm)
0.0118 - 0.0197 in.
Exhaust
(0.30 - 0.50 mm)
0.0142 - 0.0220 in.
Intake
(0.36 - 0.56 mm)
0.0138 - 0.0217 in.
Exhaust
(0.35 - 0.55 mm)
0.0197 - 0.0276 in.
Intake
(0.50 - 0.70 mm)
0.0276 - 0.0354 in.
Exhaust
(0.70 - 0.90 mm)
Intake 120°
Exhaust
40°, 150°
Valve Bridge Clearance
(4-Valve Head Only)
Limit
0.0059 in.
(0.15 mm)
0.0315 in. (0.8 mm)
0.0315 in. (0.8 mm)
0.0315 in. (0.8 mm)
0.0315 in. (0.8 mm)
0.0315 in. (0.8 mm)
0.0315 in. (0.8 mm)
0.0394 in. (1.0 mm)
0.0472 in. (1.2 mm)
-
90° -
-
TNV DI Service Manual
Introduction
0
0
Reference
Page
See Valve
Recession on
page 6-39
and 6-54.
See Valve
Face and
Valve Seat
on page 6-40
and 6-54.