Mercury 40 Service Manual page 197

Table of Contents
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Head . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Camshaft/Oil Pump . . . . . . . . . . . . . . . . . . . . . . . .
Intake/Exhaust Valves . . . . . . . . . . . . . . . . . . . . .
Valve Clearance Adjustment
Cylinder Head Cover Removal
Adjusting Valves . . . . . . . . . . . . . . . . . . . . . .
Cylinder Head Cover Installation
Timing Belt Inspection . . . . . . . . . . . . . . . . . . . .
Timing Belt Removal . . . . . . . . . . . . . . . . . . . . . .
Timing Belt Installation . . . . . . . . . . . . . . . . . . . .
Cylinder Head Disassembly
Cylinder Head Cover Removal
Cylinder Head Removal
Rocker Arm Assembly Removal
Oil Pump Removal . . . . . . . . . . . . . . . . . . . .
Camshaft Removal . . . . . . . . . . . . . . . . . . . .
Valve Removal . . . . . . . . . . . . . . . . . . . . . . . .
Anode Removal . . . . . . . . . . . . . . . . . . . . . . .
Oil Pump Disassembly
Specifications
CAMSHAFT
VALVE SPRING
90-828631R3 MARCH 1999
POWERHEAD
Section 4A - Cylinder Head
4A-1
4A-3
4A-4
4A-6
4A-8
. . . . . . . . . . . . . . . 4A-10
. . . . . . . . . . 4A-10
4A-11
. . . . . . . . 4A-13
4A-14
4A-14
4A-17
. . . . . . . . . . . . . . . 4A-21
. . . . . . . . . . 4A-21
. . . . . . . . . . . . . . . . 4A-22
. . . . . . . . . 4A-23
4A-23
4A-24
4A-25
4A-26
. . . . . . . . . . . . . . . . . 4A-26
Camshaft Dimensions
Intake "A"
Exhaust "A"
Intake "B"
Exhaust "B"
Run-out Limit
Free Length "a"
Tilt Limit "b"
b
Compressed Pressure (Installed)
Intake
Exhaust
Tilt Limit (Intake & Exhaust)
Dir. of Winding (Intake & Exhaust)
Cleaning and Inspection . . . . . . . . . . . . . . . . . . .
Oil Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rocker Shaft and Rocker Arm
Camshaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Head . . . . . . . . . . . . . . . . . . . . . . . .
Valve Guides . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Guide Replacement
Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Springs . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Seat Reconditioning
Valve Refacing Steps
Cylinder Head Reassembly
Valve Installation . . . . . . . . . . . . . . . . . . . . . .
Camshaft Oil Seal Installation
Camshaft Installation
Oil Pump Assembly . . . . . . . . . . . . . . . . . . . .
Oil Pump Installation . . . . . . . . . . . . . . . . . . .
Rocker Arm Shaft Assembly
Rocker Arm Shaft Installation
Cylinder Head Gasket
Cylinder Head Installation
Cylinder Head Cover Installation
1.216 - 1.220 in. (30.89 - 30.99 mm)
1.213 - 1.217 in. (30.82 - 30.92 mm)
A
1.022 - 1.025 in. (25.95 - 26.05 mm)
1.022 - 1.025 in. (25.95 - 26.05 mm)
B
0.0039 in. (0.1 mm)
1.491-1.569 in. (37.85-39.85 mm)
Less than 0.060 in. (1.7 mm)
a
19.8 - 22.0 lb (9.0 - 10.0 kg)
19.8 - 22.0 lb (9.0 - 10.0 kg)
0.043 in. (1.1 mm)
CYLINDER HEAD
4A-27
4A-27
. . . . . . . . . . . 4A-27
4A-28
4A-29
4A-29
. . . . . . . . . . . . . . 4A-30
4A-31
4A-32
. . . . . . . . . . . . . . 4A-33
. . . . . . . . . . . . . . . . . . 4A-34
. . . . . . . . . . . . . . . . 4A-35
4A-35
. . . . . . . . . . . 4A-37
. . . . . . . . . . . . . . . . . . 4A-38
4A-39
4A-40
. . . . . . . . . . . . 4A-41
. . . . . . . . . . . 4A-41
. . . . . . . . . . . . . . . . . . 4A-42
. . . . . . . . . . . . . . 4A-42
. . . . . . . . 4A-44
Left Hand
Page 4A-1
4
A