Valve Guides; Check Valve Guides; Valve Guide Repair Kit #19232; Repair Aluminum Valve Guides Counterbore Reaming - Briggs & Stratton Twin Cylinder L-Head Repair Manual

VALVE GUIDES

Check Valve Guides

Check valve guide bushings for wear using reject
gauge Tool #19151, Fig. 10. If gauge enters guide
5/16" (8 mm) or more, guide must be repaired or
replaced.

Valve Guide Repair Kit #19232

Valve guides may be reconditioned using Valve Guide
Repair Kit, #19232. The methods used to recondition
valve guides depend on valve guide material (alumi-
num, brass or sintered iron).
Repair Aluminum Valve Guides
Counterbore Reaming
1. Insert pilot guide bushing, #19234 and counter-
bore reamer, #19231 into worn valve guide.
2. Place new service bushing, Part #231218 on pilot
bushing next to reamer.
3. Mark reamer level to 1/16" (1.6 mm) above top
edge of service bushing, Fig. 11.
4. Lubricate reamer with Stanisol or kerosene.
5. Turn reamer clockwise until mark on reamer is
flush with top of guide bushing, Fig. 12.
DO NOT REAM THROUGH GUIDE.
6. Continue to turn reamer clockwise while removing
reamer from guide.
a. Flush out all chips.
7. Using bushing driver, #19204, press in new bush-
ing until it bottoms.
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REJECT
GAUGE
19151
Fig. 10 – Check Valve Guide
BUSHING
REPLACEMENT
PILOT
BUSHING
PILOT OF
COUNTERBORE
REAMER
Fig. 11 – Mark Reamer
Fig. 12 – Counterbore Valve Guide
BUSHING
DRIVER
19204
REPLACEMENT
BUSHING
Fig. 13 – Install Bushing
MARK
MARK
DO NOT REAM THROUGH
GUIDE
5