Honda Prelude Accord Civic S2000 2001-2006

Piston & Ring Positioning

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When assembling the pistons, piston rings and connecting rods, and when installing these assemblies into the engine block, it is vitally important to ensure that these three components are properly positioned with respect to each other. Often times the engine block is designed so that if a connecting rod or piston is installed backwards, or in the wrong bank of cylinders, internal engine damage may occur once the engine is started. The piston ring end-gap spacing that is recommended by the engine manufacturer is often with the purpose of increased compression pressures during the engine break-in period. Failure to properly space the piston ring end-gaps may lead to increased oil consumption and extended break-in time. Therefore, always be sure to position the pistons, rings and connecting rods as shown in the accompanying illustrations.


WARNING
Always be sure to matchmark the connecting rods and caps prior to disassembly so that they may be reassembled with their original counterparts. If the caps are not installed on their original connecting rods, the assemblies will most likely need machining to avoid bearing, connecting rod and/or crankshaft damage.



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Fig. Honda engines-before removing the caps from the connecting rods, be sure to matchmark them as shown



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Fig. Honda engines-piston ring positioning



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Fig. Honda engines-piston ring end-gap spacing



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Fig. Honda 1.7L engines-piston/connecting rod assembly-to-engine orientation. The arrow (A) must face the timing belt side of the engine



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Fig. Honda 2.2L (H22A4) engines-compression ring locations



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Fig. Honda 2.2L and 2.3L engines-compression ring locations



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Fig. Honda 2.4 engine-compression ring locations



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Fig. Honda 2.2L (H22A4) engines-piston/connecting rod assembly-to-engine orientation

When assembling the pistons, piston rings and connecting rods, and when installing these assemblies into the engine block, it is vitally important to ensure that these three components are properly positioned with respect to each other. Often times the engine block is designed so that if a connecting rod or piston is installed backwards, or in the wrong bank of cylinders, internal engine damage may occur once the engine is started. The piston ring end-gap spacing that is recommended by the engine manufacturer is often with the purpose of increased compression pressures during the engine break-in period. Failure to properly space the piston ring end-gaps may lead to increased oil consumption and extended break-in time. Therefore, always be sure to position the pistons, rings and connecting rods as shown in the accompanying illustrations.


WARNING
Always be sure to matchmark the connecting rods and caps prior to disassembly so that they may be reassembled with their original counterparts. If the caps are not installed on their original connecting rods, the assemblies will most likely need machining to avoid bearing, connecting rod and/or crankshaft damage.



Click image to see an enlarged view

Fig. Before removing the caps from the connecting rods, be sure to matchmark them as shown



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Fig. Piston ring positioning



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Fig. Piston/connecting rod assembly-to-engine orientation. The arrow (A) must face the timing belt side of the engine-1.7L engine



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Fig. Honda 2.2L (H22A4) engines-compression ring locations



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Fig. Compression ring locations-2.2L (2001) and 2.3L engines



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Fig. Compression ring location-2.4L engine

 
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