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General Description
MECHANICAL

Piston pin

Outer diameter
Standard clearance between piston and piston pin

mm (in)
mm (in)

Degree of fit
Top ring

Ring closed gap

Second
mm (in)
ring

Piston ring
Oil ring
Top ring
Ring groove gap

Connecting
rod

Connecting
rod bearing

Connecting
rod bushing

mm (in)

Bend or twist per 100 mm
(3.94 in) in length

Second
ring

STD
Limit
2.0 L
2.5 L

STD
Limit
STD
Limit

STD
Limit
STD
Limit
STD
Limit

mm (in) Limit

STD
Limit
STD
Oil clearance
mm (in)
Limit
STD
0.03 (0.0012) US
2.0 L
0.05 (0.0020) US
0.25 (0.0098) US
Thickness at cenmm (in)
ter portion
STD
0.03 (0.0012) US
2.5 L
0.05 (0.0020) US
0.25 (0.0098) US
STD
Clearance between piston pin
mm (in)
and bushing
Limit
Side clearance at large end

mm (in)

ME(H4SO)-4

22.994 — 23.000 (0.9053 — 0.9055)
0.004 — 0.008 (0.0002 — 0.0003)
Piston pin must be fitted into position with
thumb at 20°C (68°F).
0.20 — 0.35 (0.0079 — 0.0138)
1.0 (0.039)
0.35 — 0.50 (0.0138 — 0.0197)
1.0 (0.039)
0.37 — 0.52 (0.0146 — 0.0204)
1.0 (0.039)
0.20 — 0.50 (0.0079 — 0.0197)
1.5 (0.059)
0.040 — 0.080 (0.0016 — 0.0031)
0.15 (0.0059)
0.030 — 0.070 (0.0012 — 0.0028)
0.15 (0.0059)
0.10 (0.0039)
0.070 — 0.330 (0.0028 — 0.0130)
0.4 (0.016)
0.0158 — 0.0438 (0.0006 — 0.0017)
0.05 (0.0020)
1.492 — 1.501 (0.0587 — 0.0591)
1.510 — 1.513 (0.0594 — 0.0596)
1.520 — 1.523 (0.0598 — 0.0600)
1.620 — 1.623 (0.0638 — 0.0639)
1.492 — 1.503 (0.0587 — 0.0591)
1.510 — 1.513 (0.0594 — 0.0596)
1.520 — 1.523 (0.0598 — 0.0600)
1.620 — 1.623 (0.0638 — 0.0639)
0 — 0.022 (0 — 0.0009)
0.030 (0.0012)