The valve timing mechanism serves to ensure the intake of fresh air charge into the cylinders and the exhaust of exhaust gases from them
The clearance between the oil scraper ring and the groove on the piston must be between 0.135 and 0.335 mm.
After disassembled the engine, you need to thoroughly wash all the parts with gasoline and remove carbon deposits.
Before assembling the engine, it is necessary to inspect the cylinder block, cylinder head and all the main parts for assembling the engine.
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