BMW E46 M3 (S54B32) rod bearing replacement - DIY guide

Find and decode BMW E46 fault/error codes, access wiring schematics, and follow detailed repair manuals.
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spinecki
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BMW E46 M3 (S54B32) rod bearing replacement - DIY guide

Tools needed:
  • Engine hoist and stand
  • Torque wrench
  • Plastigage
  • Various sockets and wrenches
Procedure overview:
  • Remove engine from car
  • Disassemble bottom end of engine
  • Remove and inspect crankshaft
  • Replace rod bearings (consider upgrading to coated bearings)
  • Reassemble engine with correct torque specs
  • Reinstall engine in car
Important considerations:
  • Use OEM or high-quality aftermarket bearings
  • Check crankshaft for scoring or damage
  • Maintain strict cleanliness throughout the process
  • Consider replacing other wear items while engine is apart
Note: This is a major engine repair. If you're not experienced with engine rebuilding, seek professional help.
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