Manual Vanguard Twin Cylinder OHV Liquid-Cooled (page 48 of 85) (English)

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Vanguard

Twin-Cylinder OHV Liquid-Cooled Engine

Section 4 - Engine Overhaul

Page 43

a. Use a 605 cutter to narrow seat from bottom

and a 155 cutter to narrow seat from top, Fig.

88.

NOTE: If valve seat is loose or cracked, replace

cylinder head.

Fig. 88

3. Valve faces may be resurfaced to 45°. See Fig. 89

for dimensions for valves.

Fig. 89

4. Lap valves and seats with valve lapping tool,

#19258 and valve lapping compound, tool #94150.

NOTE: In most instances it is more economical

to replace the valves than to reface them.

Assemble Cylinder Head

1. Use valve guide driver, Tool

#19416 and install

new intake valve stem seals, Fig. 90.

a. Oil inner surface and lip of valve stem seal.

b. Press seal on to valve guide bushing until it

bottoms.

Fig. 90

2. Install valves, Fig. 91.

NOTE: Lightly coat valve stems with Valve

Guide Lubricant #93963 before installing valves

but be sure valve guide lubricant is

NOT on valve

face, seat or end of valve stem.

Fig. 91

1-16”-3/64”

(0.8 MM TO 1.2 MM)

45°

VALVE SEAT

DIMENSIONS

60° CUTTER

15° CUTTER

3/16”-1/16”

(1.2MM-1.6MM)

1/32”

MINIMUM

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Vanguard Twin Cylinder OHV Liquid-Cooled Manual

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