Cylinder Head - Briggs & Stratton 272147 Repair Manual

TM
Vanguard Twin-Cylinder OHV Liquid-Cooled Engine
Section 4 - Engine Overhaul
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.

1-16"-3/64"
(0.8 MM TO 1.2 MM)
45°
VALVE SEAT
DIMENSIONS
Fig. 88
3. Valve faces may be resurfaced to 45°. See Fig. 89
for dimensions for valves.
3/16"-1/16"
(1.2MM-1.6MM)
Fig. 89
4. Lap valves and seats with valve lapping tool,
and valve lapping compound, tool
#19258
NOTE:
In most instances it is more economical
to replace the valves than to reface them.
60° CUTTER
15° CUTTER
1/32"
MINIMUM
.
#94150
Assemble Cylinder Head
1. Use valve guide driver, Tool
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
face, seat or end of valve stem.
Fig. 91
and install
#19416
on valve
NOT
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