Exhaut
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EM4394
Intake
54 mm
(2.13 in.)
59 mm
(2.32 in.)
EM-22
ENGINE MECHANICAL —
Cylinder Head
I NSPECTION, CLEANING AND REPAIR OF
CYLINDER HEAD COMPONENTS
10. IF NECESSARY, REPLACE VALVE GUIDE BUSHINGS
(a) Using SST and a hammer, drive out the valve guide
bushing.
SST 09201 -6001 1
(b)
Using a caliper gauge, measure the bushing bore
diameter of the cylinder head.
Standard valve guide bore (cold):
14.000 — 14.018 mm (0.5512 — 0.5519 in.)
If the bushining bore diameter of the cylinder head is
more than 14.018 mm (0.5512 in.), machine the bore to
the following dimensions and install an oversized bush-
ing (0/S 0.05).
Rebored cylinder head bushing bore dimension:
14.050 — 14.068 mm (0.5531 — 0.5539 in.)
If the bushing bore diameter of the cylinder head is
greater than 14.068 mm (0.5539 in.), replace the cylin-
der head.
(c)
Using SST and a hammer, drive in a new valve guide
bushing so it is protruding 17.3 — 17.7 mm (0.681 —
0.697 in.) from the cylinder head.
SST 09201 -6001 1
HINT: Different bushings are used for the intake and
exhaust.
(d) Using a sharp 8.0 mm reamer, ream the valve guide
bushing to obtain the specified clearance between
the valve guide bushing and the new valve.
Intake clearance:
0.025 — 0.060 mm
(0.0010 — 0.0024 in.)
Exhaust clearance: 0.035 — 0.070 mm
(0.0014 — 0.0028 in.)
Summary of Contents for 3F-E
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