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Crankshaft and Bearing Removal

Crankshaft and Bearing Removal



Special Tools

• GE 6125-1B Slide Hammer Adapter

• EN 49102 Crankshaft Bearing Cap Remover


For equivalent regional tools, refer to Special Tools .

Crankshaft End Play Measurement


1. Place a dial indicator at the crankshaft nose.

2. Gently force the crankshaft to the extreme front and rear positions with a pry tool while monitoring the movement of the dial indicator.

3. The crankshaft end play should not exceed specifications. Refer to Engine Mechanical Specifications (LF1) Engine Mechanical Specifications (LAU or LBW) .

4. If the specifications are exceeded inspect the thrust bearing thrust OD and the crankshaft thrust wall for wear and/or excessive runout. Refer to Engine Mechanical Specifications (LF1) Engine Mechanical Specifications (LAU or LBW) .

5. Replace the thrust bearing or crankshaft as necessary.


Crankshaft Removal


1. Remove the crankshaft bearing cap side bolts.


2. Remove the crankshaft bearing cap outer bolts.

3. Remove the crankshaft bearing cap inner bolts.

4. Remove the crankshaft bearing caps using the GE 6125-1B adapter (1) and EN 49102 remover (2).


5. Using two hands, lift the crankshaft straight up from the engine block.


6. Place the crankshaft in a secure place.

7. Remove the crankshaft key from the nose of the crankshaft, if damaged.



Crankshaft Bearing Removal


1. Prepare a piece of cardboard or equivalent, numbered 1-4 for bearing identification. Main bearing journals are numbered from the front of the engine.

2. Remove the crankshaft upper bearing halves from the cylinder block. Note the position of the thrust bearing (1) at the number 3 journal (2).


3. Place the crankshaft upper bearing halves on the cardboard in the correct positions. Note that the number 3 bearing is the thrust bearing.

4. Remove the crankshaft lower bearing halves from the crankshaft bearing caps.


5. Place the crankshaft lower bearing halves in the correct positions on the cardboard.