Stock pistons are by Mahle ( Piston - Ford (DR3Z-6108-A )
Piston and Connecting Rod | |
| Piston diameter | 90.180 ± 0.005 mm (3.5504 ± 0.0002 in) |
| Piston-to-cylinder bore clearance (at grade size) | 0.025-0.045 mm (0.0010-0.0018 in) |
| Piston ring end gap — top | 0.2-0.3 mm (0.008-0.012 in) |
| Piston ring end gap — intermediate | 0.40-0.60 mm (0.016-0.024 in) |
| Piston ring gap — oil control | 0.15-0.45 mm (0.006-0.018 in) |
| Piston ring groove width — top | 1.22-1.25 mm (0.048-0.049 in) |
| Piston ring groove width — intermediate | 1.22-1.24 mm (0.048-0.049 in) |
| Piston ring groove width — oil control | 2.53-2.55 mm (0.100 in) |
| Piston ring width | 1.17-1.20 mm (0.046-0.047 in) |
| Piston ring-to-groove clearance — top | 0.020-0.080 mm (0.008-0.003 in) |
| Piston ring-to-groove clearance — intermediate | 0.020-0.079 mm (0.0008-0.003 in) |
| Piston pin bore diameter | 22.008-22.014 mm (0.8665-0.8667 in) |
| Piston pin diameter | 22.0005-22.0030 mm (0.8662-0.8663 in) |
| Piston pin length | 61.8 mm (2.433 in) |
| Piston pin-to-piston fit (clearance) | 0.005-0.0135 mm (0.0002-0.0005 in) |
| Connecting rod-to-pin clearance | 0.008-0.021 mm (0.0003-0.0008 in) |
| Connecting rod pin bore diameter | 22.012-22.024 mm (0.8666-0.8671 in) |
| Connecting rod length (centerline bore-to-bore) | 169.1 mm (6.6575 in) |
| Connecting rod maximum allowed bend | ± 0.038 mm (0.0015 in) |
| Connecting rod maximum allowed twist | ± 0.05 mm (0.0021 in) |
| Connecting rod bearing bore diameter (with assembled liners) | 53.049-53.027 mm (2.0885-2.0877 in) |
| Connecting rod bearing-to-crankshaft clearance | 0.064-0.026 mm (0.0025-0.001 in) |
| Connecting rod side clearance (as assembled to crank) — standard play | 0.300 ± 0.175 mm (0.0118 ± 0.0069 in) |
| Connecting rod side clearance (as assembled to crank) — max. play | 0.475 mm (0.0187 in) |
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