CYLINDER
14-7
CYLINDER SLEEVE I.D.
Measure and record the cylinder I.D. at three levels in
both the "X" axis (perpendicular to crankshaft) and the
"Y" axis (parallel to crankshaft). Take the maximum
reading to determine cylinder wear and taper.
If the measurement is more than the service limit,
replace the cylinder (page 14-5).
VALVE SEAT WIDTH
Remove the carbon deposits from the combustion
chamber (page 3-10).
Inspect each valve face for irregularities.
If necessary, replace the valve (page 14-5).
Apply a light coat of Prussian Blue or erasable felt-
tipped marker ink to the each valve seat.
Using a valve lapper, insert the valve, and snap it
closed against its seat several times. Be sure the valve
does not rotate on the seat.The transferred marking
compound will show any area of the valve face that is
not concentric.
Measure the valve seat width of the cylinder.
If the measurement is more than the service limit,
recondition the valve seat (page 14-13).
Check whether the valve seat contact area of the valve
is too high.
If the valve seat is too high, recondition the valve seat
(page 14-13).
VALVE GUIDE I.D.
Ream the valve guide (1) to remove any carbon
deposits before measuring.
Turn the special tool (Valve guide reamer) clockwise,
never counterclockwise.
Continue to rotate the special tool while removing it
from the valve guide.
STANDARD:
78.000 – 78.015 mm
(3.0709 – 3.0715 in)
SERVICE LIMIT:
78.150 mm (3.0768 in)
X
Y
TOP
MIDDLE
BOTTOM
STANDARD:
1.0 – 1.2 mm (0.04 – 0.05 in)
SERVICE LIMIT:
2.1 mm (0.08 in)
(1)
VALVE SEAT
WIDTH
CONTACT
TOO HIGH
TOOL:
Valve guide reamer 5.510 mm (2) 07984-2000001
(1)
(2)
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Summary of Contents for GX630
Page 1: ...HONDA GX690 WORKSHOP MANUAL ...
Page 18: ...MEMO 0 DQQM ࡍ ࠫ 㧞㧜㧜㧥ᐕ㧢 㧝㧢ᣣ ޓ Ἣᦐᣣ ޓ ඦᓟ㧢ᤨ㧝㧣ಽ ...
Page 44: ...MEMO 0 DQQM ࡍ ࠫ 㧞㧜㧜㧥ᐕ㧢 㧝㧢ᣣ ޓ Ἣᦐᣣ ޓ ඦᓟ㧢ᤨ㧝㧣ಽ ...
Page 54: ...MEMO 0 DQQM ࡍ ࠫ 㧞㧜㧜㧥ᐕ㧢 㧝㧢ᣣ ޓ Ἣᦐᣣ ޓ ඦᓟ㧢ᤨ㧝㧣ಽ ...
Page 86: ...MEMO 0 DQQM ࡍ ࠫ 㧞㧜㧜㧥ᐕ㧢 㧝㧢ᣣ ޓ Ἣᦐᣣ ޓ ඦᓟ㧢ᤨ㧝㧣ಽ ...
Page 100: ...MEMO 0 DQQM ࡍ ࠫ 㧞㧜㧜㧥ᐕ㧢 㧝㧢ᣣ ޓ Ἣᦐᣣ ޓ ඦᓟ㧢ᤨ㧝㧣ಽ ...
Page 106: ...MEMO 0 DQQM ࡍ ࠫ 㧞㧜㧜㧥ᐕ㧢 㧝㧢ᣣ ޓ Ἣᦐᣣ ޓ ඦᓟ㧢ᤨ㧝㧣ಽ ...
Page 140: ...MEMO 0 DQQM ࡍ ࠫ 㧞㧜㧜㧥ᐕ㧢 㧝㧢ᣣ ޓ Ἣᦐᣣ ޓ ඦᓟ㧢ᤨ㧝㧣ಽ ...
