Briggs & Stratton Vanguard 10V300, Repair Manual

Page: 63 / 112

6
57
ring gap. Damaged or distorted rings result in blow-
by of exhaust gases, increased oil consumption, and
lower service life of valves and other components.
CAUTION
Always wear proper eye protection when installing
compression and oil wiper rings. Slippage may
propel the ring with enough force to cause eye
injury.
70
9. See inset of Figure 70. Carefully install the oil wiper
ring ( A ) into the middle ring groove, so that the two
painted marks are to the right of the ring end gap.
NOTE: Installing the oil wiper ring upside down
will cause oil to be scraped up into the combustion
chamber resulting in excessive oil consumption and
lower service life on valves and other components.
10. Carefully install the compression ring ( B ) into the top
ring groove, so that the single painted mark is to the
right of the ring end gap.
11. Rotate piston rings using the palms of both hands.
Verify that the rings rotate freely without sticking.
12. Stagger the ring gaps around the piston. Proceed as
follows:
A. See Figure 71. Rotate expander spring, so that
the gap is positioned at the front of the piston ( A ).
B. Rotate bottom oil rail to position the gap 90° from
the gap in the expander spring ( B ).
C. Rotate top oil rail to position the gap 180° from
the gap in the bottom oil rail ( C ).
D. Rotate the middle oil wiper ring to align the gap
with the gap in the expander spring ( D ).
E. Rotate the top oil compression ring to position the
gap 180° from the gap in the oil wiper ring ( E ).
71
Not for
Reproduction