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M11 Series – Service Manual – 001-014   Connecting Rod

Remove

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The piston and connecting rod

must be removed as an assembly on M Series engines.

Refer to Procedure 001-054 for removal instructions.

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Clean

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 WARNING 

When using a steam cleaner, wear protective clothing, as well as, safety glasses or a face shield. Hot steam can cause serious personal injury.

Use steam or solvent to clean the connecting rods. Dry with compressed
air.

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Inspect for Reuse

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Inspect the connecting rods and caps for damage.

Replace the connecting rod if the “l-beam” is nicked or damaged.

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Inspect the connecting rod pin bore bushing for damage.

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Install the connecting rod caps and capscrews.

NOTE: The connecting rod cap number

must match the number on
the connecting rod and be installed with the numbers aligned.

Tighten the capscrews in alternating sequence to the following torque
values:

Torque Value: Step 1 68 n.m   [50 ft-lb]
  Step 2 142 n.m   [105 ft-lb]
  Step 3 210 n.m   [155 ft-lb]
  Step 4 Loosen completely
  Step 5 Repeat steps 1 through 3

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Measure the connecting rod crankshaft bore inside diameter.

Connecting Rod Crankshaft Bore I.D.
mm in
83.975 MIN 3.3061
84.025 MAX 3.3080

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Measure the piston pin bushing inside diameter.

Piston Pin Bushing I.D.
mm in
54.054 MIN 2.1281
54.099 MAX 2.1299

NOTE: Refer to the M11 Shop Manual, Bulletin No. 3666075, to measure the bend and twist of the connecting rods.

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Remove the capscrews and rod caps.

Measure the connecting rod capscrew outside diameter.

Connecting Rod Capscrew O.D.
mm in
12.60 MIN 0.496
12.80 MAX 0.504

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Install

 TOC

The piston and connecting rod

must be installed as an assembly on M Series engines.

Refer to Procedure 001-054 for installation instructions.

SMALL | MEDIUM | LARGE
Last Modified:  07-May-2003
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