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54
Servicing Your Honda
Valve Clearance
3. Rotate the crankshaft by turning the primary
drive gear bolt (2) (crankshaft) clockwise until
the punch mark (3) on the primary drive gear
aligns with the index mark (4) on the right
crankcase cover. In this position, the piston
may either be on the compression or exhaust
stroke.
If the crankshaft passed the punch mark, rotate
the primary drive gear bolt clockwise again
and align the punch mark with the index mark.
The inspection must be made when the piston
is at the top of the compression stroke when
both the intake and exhaust valves are closed.
This condition can be determined by moving
the exhaust rocker arms (5). If they are free, it
is an indication that the valves are closed and
that the piston is on the compression stroke. If
they are tight and the valves are open, rotate
the primary drive gear bolt 360° and realign the
punch mark with the index mark.
1. Measure the intake valve clearance by
inserting a feeler gauge (1) between the valve
lifters (2) and intake cam lobes (3).
2. Measure the exhaust valve clearance by
inserting a feeler gauge (1) between the
exhaust rocker arms (4) and exhaust valve
shims (5).
Valve Clearance:
If intake valve clearance and exhaust valve
clearance need adjustment, see Camshaft Holder
Assembly Removal (page 55) and select the correct
shim for each valve.
(2) primary drive gear bolt (4) index mark
(3) punch mark
(2)
(4)
(3)
(5) exhaust rocker arms
Valve Clearance Inspection
(1) feeler gauge
(2) valve lifters
(3) intake cam lobes
(5)
(1)
(2)
(3)
(1) feeler gauge
(4) exhaust rocker arms
(5) exhaust valve shims
IN: 0.006 ± 0.001 in (0.16 ± 0.03 mm)
EX: 0.010 ± 0.001 in (0.26 ± 0.03 mm)
(1)
(5)
(4)
31KSE7100_NA.book 54 ページ ２０１９年４月９日 火曜日 午後１時１３分
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