BMW Coupes and Sedans 1970-1988 Repair Guide

Pilot Bearing

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The pilot bearing is located in the end of the crankshaft and holds the end of the transmission input shaft in alignment. If the pilot shaft seizes, the transmission will grind into gear or not shift properly. Sometimes what are thought to be transmission problems can be cured with a new pilot bearing. It is always a good idea to replace the pilot bearing when replacing the clutch.

REMOVAL & INSTALLATION



See Figures 1, 2, 3, 4 and 5

  1. Remove the transmission and clutch.
  2.  
  3. Use a small bore bearing puller to remove the bearing from the end of the crankshaft. Note the order of washers and spacers when removing.
  4.  
  5. Clean the bore in the crankshaft of the old grease.
  6.  
  7. Lubricate the new bearing with 1 gram of grease and drive into the crankshaft bore.
  8.  
  9. Install the washers and spacers onto the crankshaft. Clean any excess grease from the surrounding area.
  10.  



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Fig. Fig. 1: The pilot bearing is visible at the center of the flywheel



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Fig. Fig. 2: Remove all the washers from the bore



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Fig. Fig. 3: Some washers may have to be removed using a pick tool



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Fig. Fig. 4: Apply grease before installing the bearing



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Fig. Fig. 5: Use a socket and hammer to tap the bearing into place

  1. Install the clutch and transmission.
  2.  

 
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