Note: If the connecting rod is replaced, ensure that the same grade of length as the original connecting rod is used. However, if the crankshaft or the cylinder block is replaced, the required grade of length of the connecting rods may change.
The color code is marked on the side of the connecting rod or on the connecting rod cap in order to identify the length grade for the connecting rod. The difference between each grade of length is 0.046 mm (0.0018 inch).
Connecting rods are color coded. The color code is a reference for the length (Y) of the connecting rod. Refer to Table 2 for the different lengths of connecting rods.
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| Illustration 1 | g00915056 |
| Length Grades for Connecting Rods | ||
|---|---|---|
| Grade Letter | Color Code | Length (Y) |
| F | Red | 165.728 to 165.761 mm (6.5247 to 6.5260 inch) |
| G | Orange | 165.682 to 165.715 mm (6.5229 to 6.5242 inch) |
| H | White | 165.637 to 165.670 mm (6.5211 to 6.5224 inch) |
| J | Green | 165.591 to 165.624 mm (6.5193 to 6.5206 inch) |
| K | Purple | 165.545 to 165.578 mm (6.5175 to 6.5188 inch) |
| L | Blue | 165.499 to 165.532 mm (6.5157 to 6.4961 inch) |
Serrated Connecting Rods and Flat Connecting Rods
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| Illustration 2 | g00636808 |
(1) Inside diameter of connecting rod for the piston pin bearing ... 43.01 to 43.04 mm (1.693 to 1.694 inch)
(2) Outside diameter of piston pin bearing ... 43.11 to 43.15 mm (1.6972 to 1.6988 inch)
Inside diameter of piston pin bearing after reaming ... 39.723 to 39.738 mm (1.5638 to 1.5645 inch)
Clearance between piston pin bearing and piston pin ... 0.023 to 0.044 mm (0.0009 to 0.0017 inch)
(3) Distance between center of piston pin and center of connecting rod bearing bore ... 219.05 to 219.10 mm (8.624 to 8.626 inch)
(4) Connecting rod bearings are available for remachined journals of the crankshaft which have the following undersize dimensions:
0.25 mm (0.010 inch)
0.51 mm (0.020 inch)
0.76 mm (0.030 inch)
Shell thickness
- Naturally aspirated engines ... 1.835 to 1.842 mm (0.0723 to 0.0725 inch)
- Turbocharged engines ... 1.835 to 1.844 mm (0.0723 to 0.0726 inch)
Width of connecting rod bearing
- Naturally aspirated engines ... 31.62 to 31.88 mm (1.245 to 1.255 inch)
- Turbocharged engines ... 31.55 to 31.88 mm (1.240 to 1.255 inch)
Bearing clearance
- Naturally aspirated engines ... 0.035 to 0.081 mm (0.0014 to 0.0032 inch)
- Turbocharged engines ... 0.030 to 0.081 mm (0.0012 to 0.0032 inch)
(5) Inside diameter of connecting rod for connecting rod bearing ... 67.21 to 67.22 mm (2.6460 to 2.6465 inch)
(6) Connecting rod cap with nuts and bolts
Tighten the nuts for the connecting rod cap to the following torque. ... 125 N·m (92 lb ft)
Connecting rod cap with bolts only
Tighten the bolts for the connecting rod cap to the following torque. ... 155 N·m (114 lb ft)
Note: If piston cooling jets are installed, the piston and the connecting rod assembly must be turned when the piston and rod assembly is installed. Turning the piston and connecting rod assembly will prevent the connecting rod from hitting and damaging the piston cooling jet. When the connecting rod has passed the piston cooling jet, turn the connecting rod until the arrow on top of the piston is toward the front of the engine.
Hydraulically Fractured Connecting Rods
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| Illustration 3 | g01064497 |
Note: The caps and rods must stay together as a pair.
Note: When the connecting rods are replaced, do not reuse the connecting rod bolts. New connecting rod bolts must be used.
The mating surfaces of the connecting rod are produced by hydraulically fracturing the forged connecting rod.
(7) Tighten the connecting rod bolts to the following torque. ... 18 N·m (13 lb ft)
Tighten the connecting rod bolts again to the following torque. ... 70 N·m (52 lb ft)
Tighten the connecting rod bolt for an additional 120 degrees.
(8) Connecting rod bearing
 | |
| Illustration 4 | g01064498 |
(9) Diameter of the bore for the piston pin ... 43.01 to 43.04 mm (1.693 to 1.694 inch)
(10) Distance between bearing centers ... 219.05 to 219.10 mm (8.624 to 8.626 inch)
(11) Diameter for the bore for the connecting rod bearing ... 67.21 to 67.22 mm (2.6460 to 2.6465 inch)