Kohler HD Series

10
Specifi cations
KohlerEngines.com 14 690 10 Rev. --
CLEARANCE SPECIFICATIONS
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HD675 HD775
Piston, Piston Rings, and Piston Pin
Pin Bore I.D. 13.002/13.008 mm
(0.5118/0.5121 in.)
18.000/18.008 mm
(0.7086/0.7089 in.)
Pin O.D. 12.990/12.996 mm
(0.5114/0.5116 in.)
17.990/17.996 mm
(0.7082/0.7085 in.)
Top and Center Compression Ring Side Clearance
New Bore 0.001/0.020 mm (0.00004/0.00080 in.)
Top and Center Compression Ring End Gap
New Bore
Top
Center
0.1/0.25 mm
(0.0039/0.0098 in.)
0.61/0.76 mm
(0.0240/0.0299 in.)
0.1/0.25 mm
(0.0039/0.0098 in.)
0.3/0.5 mm
(0.0118/0.0197 in.)
Thrust Face O.D. 64.975/64.985 mm
(0.2558/0.2558 in.)
69.960/69.980 mm
(2.7543/2.7551 in.)
Piston Thrust Face-to-Cylinder Bore Running Clearance 0.025/0.035 mm
(0.0010/0.0014 in.)
0.020/0.060 mm
(0.0007/0.0024 in.)
Valves and Valve Lifters
Intake and Exhaust Valve Lash 0.0762/0.127 mm (0.003/0.005 in.)
Intake Valve Stem-to-Valve Guide Running Clearance 0.020/0.047 mm (0.0007/0.0018 in.)
Exhaust Valve Stem-to-Valve Guide Running Clearance 0.055/0.082 mm (0.0021/0.0032 in.)
Intake Valve Guide I.D. 5.500/5.512 mm (0.2165/0.2170 in.)
Intake Valve Stem Diameter 5.465/5.480 mm (0.2151/0.2157 in.)
Exhaust Valve Guide I.D. 5.500/5.512 mm (0.2165/0.2170 in.)
Exhaust Valve Stem Diameter 5.430/5.445 mm (0.2137/0.2143 in.)
Nominal Valve Face Angle 25°, 45°, 60°
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Values are in Metric units. Values in parentheses are English equivalents.