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ENGINE
3.35
4. Measure piston ring to groove clearance by
placing the ring in the ring land and measuring
with a thickness gauge. Replace piston and rings
if ring-to-groove clearance exceeds service
limits.
Piston
Ring
Feeler Gauge
Piston Ring-to-Ring Groove Clearance
Refer To Engine Service Data
Pg. 3.12 -- 3.14
PISTON RING INSTALLED GAP
1. Place each piston ring (A) inside cylinder (B)
using piston to push ring squarely into place as
shown. (See next page)
25-50mm
B
A
C
Piston Ring Installed Gap
Refer To Engine Service Data
Pg. 3.12 -- 3.14
NOTE: Ring should be installed with the mark facing
upward.
2. Measure installed gap with a feeler gauge (C) at
both the top and bottom of the cylinder.
REMINDER: A difference in end gap indicates
cylinder taper. The cylinder should be measured
for excessive taper and out of round.
3. If the bottom installed gap measurement exceeds
the service limit, replace the rings. If ring gap is
smaller than the specified limit, file ring ends until
gap is within specified range.
NOTE: Always check piston ring installed gap after
re-boring a cylinder or when installing new rings. A
re-bored cylinder should always be scrubbed
thoroughly with hot soapy water, rinsed, and dried
completely. Wipe cylinder bore with oil immediately to
remove residue and prevent rust.