Troubleshooting - Honda C8R600F4 Service Manual

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CYLINDER HEAD/VALVE
TORQUE VALUES
Cam chain tensioner pivot bolt
Cam chain guide washer bolt
Cylinder head bolt
(9
mm)
Camshaft holder bolt
Cam sprocket bolt
Cylinder head cover bolt
Cam chain tensioner lifter mounting bolt
Spark plug
TOOLS
Compression gauge attachment
Valve spring compressor
Valve spring compressor attachment
Tappet hole protector
Valve guide driver
Valve guide reamer, 4.008 mm
Valve seat cutter, 27.5 mm (IN 45°)
ValvA !':Aat
c11ttP.r,
?4"!'i mm
o::x
45°)
Flat cutter, 27 mm (IN 32°)
Flat cutter, 24 mm (EX 32°)
Interior cutter, 26 mm (IN 60°)
Interior
c.;utter, 22 mm
(EX
60°)
Cutter holder, 4.0 mm
TROUBLESHOOTING
10 N·m (1.0 kgf·m, 7 lbf·ft)
12 N·m (1.2 kgf.m, 9 lbf.ft)
47
N·m
(4.8
kgf.m , 35 lbf·ft)
12 N·m (1.2 kgf·m, 9 lbf.ft)
20 N·m (2.0 kgf·m,
14
lbf.ft)
10 N·m (1.0 kgf.m, 7 lbf.ft)
10 N·m (1.0 kgf.m, 7 lbf.ft)
12 N·m (1.2 kgf.m, 9 lbf.ft)
07RMJ-MY50100
07757-0010000
07959-KM30101
07HMG-MR70002
07JMD-KY20100
07MMH-MV90100
Apply locking agent to the threads
Apply molybdenum oil solution to the threads
and seating surface
Apply oil to the threads and seating surface
Apply locking agem to the threads
07780-0010200
or equivalent commercially available in U.S.A.
07780-0010100
07780-0013300
07780-0012500
07780-0014500
07780-0014202
07781-0010500
Engine top-end problems usually affect engine performance. These can be diagnosed by a compression test, or by tracing
top-end noise with a sounding rod or stethoscope.
Compression too low, hard starting or poor perfor-
mance at low speed
•Valves
-Incorrect valve adjustment
Burned or bent valves
Incorrect valve timing
- Broken valve spring
Uneven valve seating
•Cylinder head
Leaking or damaged cylinder head gasket
-Warped or cracked cylinder head
Loose spark plug
•Cylinder/piston problem (section 12)
Compression too high
• Excessive carbon build-up on piston head or
combustion chamber
Excessive smoke
•Worn valve stem or valve guide
• Damaged stem seal
•Cylinder/piston problem (section 12)
Excessive noise
•Incorrect valve clearance
•::>ticking valve or broken valve spring
•Worn or damaged camshaft
•Worn or damaged valve lifter
•Worn cam chain
•Worn or damaged cam chain tensioner
• Worn cam sprocket teeth
•Cylinder/piston problem (section 12)
Rough idle
• Low cylinder compression

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