SERVICE DATA AND SPECIFICATIONS (SDS) — Inspection and Adjustment (Cont'd): Piston Ring, Connecting Rod, Crankshaft, Main Bearing, Conrod Bearing (Supplement-V)
EM-5049spec tablePiston ring 2nd end-gap inch range '0.006 - 0.0014' is a decreasing pair in source; preserved verbatim (likely a typo for 0.0006-0.0014 in). Connecting rod small-end inner diameter d₁ given as a single value '25.20 (0.992)' rather than a range — preserved as printed. Main bearing thickness values (A 1.844 / B 1.858 / C 1.869 mm) match the HALFSHELL TYPE STANDARD table on EM-5040.
Inspection and Adjustment (Cont'd)
Piston ring
Piston ring end gap
End gap — Top
Standard0.20 - 0.40 (0.008 - 0.016)
End gap — 2nd
Standard0.15 - 0.35 (0.006 - 0.0014)
End gap — Oil ring
Standard0.25 - 0.50 (0.010 - 0.020)
CONNECTING ROD
Connecting rod dimensions
Center distance (S)
Standard126.775 - 126.825 (4.9911 - 4.9931)
Connecting rod small end inner diameter* (d₁)
Standard25.20 (0.992)
Piston pin bushing inner diameter (d₂)
Standard23.007 - 23.02 (0.9058 - 0.9063)
Connecting rod big end inner diameter (D)*
Standard48.655 - 48.673 (1.9155 - 1.9163)
CRANKSHAFT
Crankshaft dimensions
Main journal dia. "Dm"
Value49.965 - 49.981 (1.9671 - 1.9678)
Pin journal dia. "Dp"
Value44.975 - 44.991 (1.7707 - 1.7713)
Free end play — Standard
Value0.07 - 0.27 (0.003 - 0.011)
MAIN BEARING
Standard
Main bearing — Standard
A
Thickness "T"1.844 (0.0726)
Identification colorBlue
B
Thickness "T"1.858 (0.0731)
Identification colorBlack
C
Thickness "T"1.869 (0.0736)
Identification colorGreen
Undersize
Main bearing — Undersize
X
Thickness "T"2.019 (0.0795)
Identification colorGreen
Y
Thickness "T"2.008 (0.0791)
Identification colorBlack
Z
Thickness "T"1.994 (0.0785)
Identification colorBlue
CONNECTING ROD BEARING
Connecting rod bearing thickness
Connecting rod bearing thickness
Standard
Thickness1.814 - 1.820 (0.071 - 0.072)
Undersize
Thickness1.964 - 1.970 (0.077 - 0.078)
Bearing clearance
Bearing clearance
Main bearing clearance — Standard
Value0.01 - 0.036 (0.0004 - 0.0014)
Connecting rod bearing clearance — Standard
Value0.01 - 0.044 (0.0004 - 0.0017)