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Home >> Ford >> 2022 >> Bronco Raptor >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine - 2.7L ECOBOOST (238KW/324PS)) >> Specifications >> Piston and Connecting Rod

Piston and Connecting Rod

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Item Specification
Piston diameter nominal (DN) height from top of piston 1.6339 in (41.5 mm)
Piston diameter - single grade 3.2643 -3.2648 in (82.912 -82.926 mm)
Piston-to-cylinder bore clearance (at Grade Size) 0.0029 -0.0042 in (.074 -.106 mm)
Piston ring end gap - compression (top, gauge diameter) 0.0110 -0.0150 in (.28 -.38 mm)
Piston ring end gap - compression (bottom, gauge diameter) 0.0138 -0.0217 in (.35 -.55 mm)
Piston ring end gap -- oil ring (steel rail, gauge diameter) 0.0059 -0.0177 in (.15 -.45 mm)
Piston ring groove width - compression (top) 0.0484 -0.0492 in (1.23 -1.25 mm)
Piston ring groove width -- compression (bottom) 0.0406 -0.0413 in (1.03 -1.05 mm)
Piston ring groove width - oil ring 0.0799 -0.0807 in (2.03 -2.05 mm)
Piston ring width - upper compression ring 0.0461 -0.0469 in (1.17 -1.19 mm)
Piston ring width - lower compression ring 0.0382 -0.0390 in (.97 -.99 mm)
Piston ring-to-groove clearance (upper and lower compression rings) 0.0016 -0.0031 in (.04 -.08 mm)
Piston pin bore diameter 0.8663 -0.8665 in (22.004 -22.008 mm)
Piston pin diameter 0.8659 -0.8661 in (21.995 -22 mm)
Piston pin length 1.9646 -1.9764 in (49.9 -50.2 mm)
Piston pin-to-piston fit 0.0002 -0.0005 in (.004 -.013 mm)
Piston-to-connecting rod clearance 0.1772 in (4.5 mm)
Connecting rod-to-pin clearance - standard 0.0006 -0.0012 in (.015 -.03 mm)
Connecting rod pin bore diameter 0.8667 -0.8671 in (22.015 -22.025 mm)
Connecting rod length (center-to-center) 5.7465 -5.7496 in (145.96 -146.04 mm)
Connecting rod maximum allowed bend 0.0008 in (.02 mm)
Connecting rod maximum allowed twist 0.0016 in (.04 mm)
Connecting rod bearing bore diameter 2.3397 -2.3402 in (59.428 -59.442 mm)
Connecting rod bearing-to-crankshaft clearance 0.0017 -0.0035 in (.042 -.088 mm)
Connecting rod side clearance (assembled to crank) - standard 0.0049 -0.0148 in (.125 -.375 mm)
Connecting rod side clearance (assembled to crank) - service limit 0.0049 -0.0148 in (.125 -.375 mm)