Cylinder Head/Valve Service Information; Cylinder Head/Valve Specifications - Honda Gold Wing GL1200D Shop Manual

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HONDA
~
GL 12000' GL 1200A
7. CYLINDER HEAD/VALVE
SERVICE INFORMATION
TROUBLESHOOTING
TIMING BELT REMOVAL
CAMSHAFT REMOVAL
CAMSHAFT HOLDER DISASSEMBLY
CYLINDER HEAD REMOVAL
CYLINDER HEAD DISASSEMBLY
SERVICE INFORMATION
7-1
7-2
7-3
7-4
7-8
7-12
7-13
VALVE SEAT INSPECTION
REFACING
CYLINDER HEAD ASSEMBLY
CAMSHAFT HOLDER ASSEMBLY/
INSTALLATION
HYDRAULIC TAPPET ADJUSTER
SHIM SELECTION
7-17
7-20
7-22
7-29
GENERAL
• Inspect and adjust timing belt tension while the engine is cold.
• Cylinder head maintenance and inspection can be done with the engine in the frame.
• Camshaft lubricating oil is fed to each cylinder head through an oil control orifice located in the engine case. Be sure these
orifices are not clogged and that the a-rings and dowel pins afe in place before installing the cylinder heads.
• C'are sb,guld be taken to prevent the camshaft drive belts from becoming contaminated with oil, which will cause the rubber
to swell and affect the camshaft timing. 00 not t'Nist the belts, or bend to a radius of less than 25 mm, to avoid possible
fracture of the fiberglass material.
• When the camshaft holders are removed, be sure to fill the de-foaming chambers with clean engine oil during
~eassembly,
which otherwise would allow air to enter the hydraulic tappet adjusters.
• Air in the hydraulic tappet adjuster causes excessive tappet noises. Remove the adjuster and bleed air if there is air in any
adjuster.
• Use a sounding rod or a stethoscope to diagnose the trouble, if the top·end is noisy.
• Adjust the hydraulic adjsuter holder with shim, if any of the following parts is replaced:
Cylinder head/camshaft holder Valve/valve seat (refacing)
- Camshaft - Rocker arm/rocker arm shaft
SPECIF ICATIONS
Unit· mm (in)
ITEM
STANDARD
SERVICE LIMIT
Cylinder compression
1,100-1,500kPa 1,000 kPa
(11-15 kg/cm
2
,
156-213 psi) (10kg/cm",142psi)
Valve, Valve guide
Stem 0.0.
IN
6.580-6.590 (0.2591-0.2594) 6.54 (0.257)
EX
6.550-6.560 (0.2579 0.2583) 6.54 (0.257)
Guide 1.0. (lN, EX) 6.600-6.615 (0.2598-0.2604) 6.64 (0.261)
Valve stem to guide
IN
0.010-0.035 (0.0004-0.0014)
0.08 (0.003)
clearance
EX
0.040-0.065 (0.0016-0.0026)
0.10 (0.004)
Seat width 1.4
(0.06)
Valve spring
Free length
INNER 40.20 \1.583)
39.0 (1.54)
OUTER
43.75 (1.722) 42.5 {1.67}
Preload/Length
INNER 26.8-30.8 kg/26 mm
(59.08-67.90 Ibs/1.0 in)
-
OUTER 47.9-55.1 kg/28 mm
(105.60-121.47Ibs/1.1 in)
-
Valve rocker arm 1.0. 14.000-14.018 (0.5512-0.5519) 14.05 (0.553)
Rocker arm shaft 0.0. 13.937 13.984 (0.5501 0.5506) 13.84 (0.545)
Assist spring free length 17.5 (0.59) 16.0 (0.63)
Hydraulic tappet adjuster compression stroke with kelosene 0-0.30 (0-0.012) 0.30 (0.012)
7 -1