KEEWAY F-ACT EVO - Piston and Cylinder Diagnosis; 13.2 Failure diagnosis

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inside diameter of piston pin hole
12.002-12.008
12.04
external diameter of piston pin
11.994-12
11.96
Clearance between piston pin hole and piston pin
0.002-0.014
0.02
Inside diameter of wrist-pin end of connecting rod
14.016-14.034
14.06
13.2 Failure diagnosis
Low compression pressure Smoking on the exhaust pipe
Piston is worn; burnt or broken The piston ring is worn or damaged
Cylinder and piston is worn or damaged Piston and cylinder is worn or damaged
Gasket is damaged; Air leakage existed between the crankcase and cylinder
Over-high compression pressure Abnormal sound of piston
Too much carbon deposits in combustion chamber damage of cylinder, piston and piston ring
wear of piston pin hole and piston pin
13.3 Cylinder block
13.3.1Disassembly of cylinder block
To take out the cylinder block after the disassembly of
cylinder head.
13.3.2 Checking of cylinder block
Check the wear of inside wall of cylinder
If it is badly worn, it should be replaced.
Check the flatness of cylinder block and cylinder
surface
Allowable limits: 0.05
Cylinder
block
Ruler
Test ruler
Cylinder
block