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ME(H4DOTC)-4 General Description MECHANICAL Piston pin Standard clearance between piston mm (in) Standard 0.004 — 0.008 (0.0002 — 0.0003) Degree of fit Piston pin must be fitted into position with thumb at 20°C (68°F). Piston ring Ring closed gap mm (in) Top ring Standard 0.20 — 0.25 (0.0079 — 0.0098) Second ring Standard 0.37 — 0.52 (0.015 — 0.0203) Oil ring Standard 0.20 — 0.50 (0.0079 — 0.0197) Ring groove gap mm (in) Top ring Standard 0.040 — 0.080 (0.0016 — 0.0031) Second ring Standard 0.030 — 0.070 (0.0012 — 0.0028) Connecting Bend or twist per 100 mm (3.94 in) mm (in) Service limit 0.1 (0.0039) Thrust clearance mm (in) Standard 0.070 — 0.330 (0.0028 — 0.0130) Bearing of Oil clearance mm (in) Standard 0.017 — 0.045 (0.0007 — 0.0018) Bearing size mm (in) Standard 1.490 — 1.502 (0.0587 — 0.0591) 0.03 (0.0012) US 1.504 — 1.512 (0.0592 — 0.0595) 0.05 (0.0020) US 1.514 — 1.522 (0.0596 — 0.0599) 0.25 (0.0098) US 1.614 — 1.622 (0.0635 — 0.0639) Bushing of Clearance between piston pin and mm (in) Standard 0 — 0.022 (0 — 0.0009) Crankshaft Bending limit mm (in) 0.035 (0.0014) Crank pin Out-of-roundness mm (in) 0.003 (0.0001) Cylindricality mm (in) 0.004 (0.0002) Grinding limit (dia.) mm (in) To 51.750 (2.0374) Crank journal Out-of-roundness mm (in) 0.005 (0.0002) Cylindricality mm (in) 0.006 (0.0002) Grinding limit (dia.) mm (in) To 59.758 (2.3527) Crank pin outer diameter mm (in) Standard 51.984 — 52.000 (2.0466 — 2.0472) 0.03 (0.0012) US 51.954 — 51.970 (2.0454 — 2.0461) 0.05 (0.0020) US 51.934 — 51.950 (2.0447 — 2.0453) 0.25 (0.0098) US 51.734 — 51.750 (2.0368 — 2.0374) Crank journal outer mm (in) Standard 59.992 — 60.008 (2.3619 — 2.3625) 0.03 (0.0012) US 59.962 — 59.978 (2.3607 — 2.3613) 0.05 (0.0020) US 59.942 — 59.958 (2.3599 — 2.3605) 0.25 (0.0098) US 59.742 — 59.758 (2.3520 — 2.3527) Thrust clearance mm (in) Standard 0.030 — 0.115 (0.0012 — 0.0045) Oil clearance mm (in) Standard 0.010 — 0.030 (0.0004 — 0.0012) Main bearing Bearing size mm (in) #1, #3 Standard 1.998 — 2.011 (0.0787 — 0.0792) 0.03 (0.0012) US 2.017 — 2.020 (0.0794 — 0.0795) 0.05 (0.0020) US 2.027 — 2.030 (0.0798 — 0.0799) 0.25 (0.0098) US 2.127 — 2.130 (0.0837 — 0.0839) #2, #4, Standard 2.000 — 2.013 (0.0787 — 0.0793) 0.03 (0.0012) US 2.019 — 2.022 (0.0795 — 0.0796) 0.05 (0.0020) US 2.029 — 2.032 (0.0799 — 0.0800) 0.25 (0.0098) US 2.129 — 2.132 (0.0838 — 0.0839) |