Service Data and Specifications (S.D.S.) - Inspection and Adjustment (Cont'd): Piston, Piston Ring and Piston Pin / Connecting Rod
EM-256spec tablePiston specs differ by engine: GA13DS, GA14DS, and GA16DS/GA16DE.
Inspection and Adjustment (Cont'd)
PISTON, PISTON RING AND PISTON PIN
Piston
Piston (Unit: mm (in))
Piston skirt diameter "A" Standard - Grade No. 1
GA13DS70.975 - 70.985 (2.7943 - 2.7947)
GA14DS73.575 - 73.585 (2.8966 - 2.8970)
GA16DS / GA16DE75.975 - 75.985 (2.9911 - 2.9915)
Grade No. 2
GA13DS70.985 - 70.995 (2.7947 - 2.7951)
GA14DS73.585 - 73.595 (2.8970 - 2.8974)
GA16DS / GA16DE75.985 - 75.995 (2.9915 - 2.9919)
Grade No. 3
GA13DS70.995 - 71.005 (2.7951 - 2.7955)
GA14DS73.595 - 73.605 (2.8974 - 2.8978)
GA16DS / GA16DE75.995 - 76.005 (2.9919 - 2.9923)
0.5 (0.020) oversize (service)
GA13DS71.475 - 71.505 (2.8140 - 2.8152)
GA14DS74.075 - 74.105 (2.9163 - 2.9175)
GA16DS / GA16DE76.475 - 76.505 (3.0108 - 3.0120)
1.0 (0.039) oversize (service)
GA13DS71.975 - 72.005 (2.8337 - 2.8348)
GA14DS74.575 - 74.605 (2.9360 - 2.9372)
GA16DS / GA16DE76.975 - 77.005 (3.0305 - 3.0317)
"a" dimension
GA13DS9.5 (0.374)
GA14DS9.5 (0.374)
GA16DS / GA16DE9.5 (0.374)
Piston pin hole inner diameter
GA13DS18.987 - 18.999 (0.7475 - 0.7480)
GA14DS18.987 - 18.999 (0.7475 - 0.7480)
GA16DS / GA16DE18.987 - 18.999 (0.7475 - 0.7480)
Piston pin outer diameter
GA13DS18.989 - 19.001 (0.7476 - 0.7481)
GA14DS18.989 - 19.001 (0.7476 - 0.7481)
GA16DS / GA16DE18.989 - 19.001 (0.7476 - 0.7481)
Piston to bore clearance
GA13DS0.015 - 0.035 (0.0006 - 0.0014)
GA14DS0.015 - 0.035 (0.0006 - 0.0014)
GA16DS / GA16DE0.015 - 0.035 (0.0006 - 0.0014)
Piston ring
Piston ring (Unit: mm (in))
Side clearance
RingTop
Standard0.040 - 0.080 (0.0016 - 0.0031)
Limit0.2 (0.008)
Side clearance
Ring2nd
Standard0.030 - 0.070 (0.0012 - 0.0028)
Limit0.2 (0.008)
End gap
RingTop
Standard0.20 - 0.35 (0.0079 - 0.0138)
Limit1.0 (0.039)
End gap
Ring2nd
Standard0.37 - 0.52 (0.0146 - 0.0205)
Limit1.0 (0.039)
End gap
RingOil
Standard0.20 - 0.60 (0.0079 - 0.0236)
Limit1.0 (0.039)
Piston pin
| Specification | Value |
|---|---|
| Piston pin outer diameter(0.7476 - 0.7481) | 18.989 - 19.001mm (in) |
| Piston pin to piston clearance(-0.0002 to 0) | -0.004 to 0mm (in) |
| Piston pin to connecting rod, bushing clearance(0.0002 - 0.0007) | 0.005 - 0.017mm (in) |
Piston pin outer diameter(0.7476 - 0.7481)
18.989 - 19.001mm (in)
Piston pin to piston clearance(-0.0002 to 0)
-0.004 to 0mm (in)
Piston pin to connecting rod, bushing clearance(0.0002 - 0.0007)
0.005 - 0.017mm (in)
CONNECTING ROD
| Specification | Value |
|---|---|
| Center distance(5.5295 - 5.5335) | 140.45 - 140.55mm (in) |
| Bend limit [per 100 (3.94)](0.0059) | 0.15mm (in) |
| Torsion limit [per 100 (3.94)](0.012) | 0.3mm (in) |
| Connecting rod bushing inner diameter* (small end)(0.7480 - 0.7485) | 19.000 - 19.012mm (in) |
| Connecting rod big end inner diameter(1.6929 - 1.6934) | 43.000 - 43.013mm (in) |
| Side clearance Standard(0.0079 - 0.0185) | 0.20 - 0.47mm (in) |
| Side clearance Limit(0.0205) | 0.52mm (in) |
Center distance(5.5295 - 5.5335)
140.45 - 140.55mm (in)
Bend limit [per 100 (3.94)](0.0059)
0.15mm (in)
Torsion limit [per 100 (3.94)](0.012)
0.3mm (in)
Connecting rod bushing inner diameter* (small end)(0.7480 - 0.7485)
19.000 - 19.012mm (in)
Connecting rod big end inner diameter(1.6929 - 1.6934)
43.000 - 43.013mm (in)
Side clearance Standard(0.0079 - 0.0185)
0.20 - 0.47mm (in)
Side clearance Limit(0.0205)
0.52mm (in)
NOTE
*: After installing in connecting rod