Inspect Va Lve Stem / Valve Guide Tolerance (All Models); Inspect Valve Seat (All Models); Reface Valves And Seats (All Models) - Briggs & Stratton Vanguard 05000 Manual

Inspect Valve Stem / Valve Guide
Tolerance (All Models)
1. Measure the valve stem at the locations
illustrated in ([A & B] Fig. 14).
For listed reject dimensions: See SECTION 14-
ENGINE SPECIFICATIONS.

Inspect Valve Seat (All Models)

7
NOTE
: Because of the additional heat endured
by the exhaust valve, inspect the area around
the exh aust seat very carefully. Cracks or an
improper fit of the seat may not be readily
apparent. Additionally, a seat that is tight when
the engine is cold may become loose with the
heat of operation. One indication is metallic
stains around the exhaust seat.
152
Fig. 14

Reface Valves and Seats (All Models)

Valve faces can be resurfaced using a
commercially available valve grinding tool.
Briggs & Stratton does not recommend this
practice as a high quality repair procedure.
• Replace damaged or worn valves.
For specifications relating to the engine you are
working on, see SECTION 14- ENGINE
SPECIFICATIONS.
1. Cut valve seats with Neway Valve Seat
Cutter Kit or
#19237
to specifications listed for your engine's
exhaust and intake seats.
• Place the proper guide pin in the valve
guide.
• Use the appropriate cutter and grind the
valve seat using the handle and slight
pressure.
Fig. 15
Valve and seat are lapped in using Valve
Lapping Tool, and Valve Lapping
#19258
Compound to assure a g ood seal
#94150
between the valve face and the seat.
2. Thoroughly clean lapping compound from
valve seat and valve face.
If seat is wider than specification:
• Use a narrowing cutter.
If valve face is bu rned:
• Replace the valve.
3. Replace valve if taper depth margin ([A]
Fig. 16) is less than 1/64" (.4mm).
, ([ A] Fig. 15)
#19343