Piston and Rings
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| Illustration 1 | g03794278 |
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| Illustration 2 | g03794268 |
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| Specification for 431-7293 Piston | |||
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| Item | Qty | Part | Specification Description |
| 1 | 1 | 436-2781 Piston Ring | Install with side marked "UP-1" toward top of the piston. |
| Thickness of the new piston ring is 2.429 to 2.473 mm (0.096 to 0.097 inch). |
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| Clearance of the ends when assembled in a new cylinder liner of bore is 0.30 to 0.40 mm (0.012 to 0.016 inch). |
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| Width of the groove (A) is 2.585 to 2.615 mm (0.102 to 0.103 inch). |
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| 2 | 1 | 435-5969 Piston Ring | Install with side marked "UP-2" toward top of the piston. |
| Thickness of the new piston ring is 2.47 to 2.50 mm (0.097 to 0.098 inch). |
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| Clearance of the ends when assembled in a new cylinder liner of bore is 0.85 to 1 mm (0.033 to 0.040 inch). |
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| Width of groove (B) is 2.550 to 2.570 mm (0.100 to 0.101 inch). |
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| 3 | 1 | 436-2782 Ring As | Install with side marked "UP-3" toward top of the piston.. |
| Thickness of the new piston ring is 3.97 to mm (0.156 to 0.157 inch) to 3.99 mm (0.157 inch). |
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| Clearance of the ends when assembled in a new cylinder liner of bore is 0.35 to 0.65 mm (0.014 to 0.026 inch). |
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| Width of groove (C) is 4.020 to 4.040 mm (0.158 to 0.159 inch). |
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| 4 | 2 | 436-2785 Retaining Ring | Install the pin retainer with the opening towards top of the piston as shown in Illustration 2. |
| 5 | 1 | 436-2783 Piston Pin | Thoroughly lubricate the piston pin with clean engine oil prior to assembly. |
| Diameter is 51.994 to 52 mm (2.0470 to 2.0474 to inch) |
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| Bore of the bushing (D) for piston pin is 52.01 mm (2.047 inch) to 52.016 mm (2.048 inch). |
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| 6 | 1 | 436-2780 Piston | Lubricate the entire piston to 360 degrees prior to assembly into the cylinder block. Use clean engine oil. |
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