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Home >> BMW >> 1982 >> 733i Standard Trans >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Mechanical >> 528E, 633CSI & 733I 6-Cylinder >> Pistons, Pins & Rings >> Piston Pin Replacement >> Removal

Piston Pin Replacement: Removal

  1. Remove circlip from pin bore groove. Push pin from piston and connecting rod. Piston pins and pistons must be replaced as matched set. All pistons must be in same weight class, as must all connecting rods.
  2. Replacement piston pin bushings are available for 633CSi and 733i model engines. Replacement bushings may be used if pin is not worn. Connecting rods on 528e models cannot be machined.
  3. Drill and deburr oil holes, and install bushing so that seam is 90° to oil hole in rod's small end. Ream bushing so pin slides through under slight pressure.
  4. On 633CSi and 733i models, assemble connecting rod to piston with oil hole in rod's small end and arrow on piston head on same side. When installed, arrow on piston and rod's small end oil hole will face front of engine.
  5. On 528e models, assemble connecting rod to piston so rod bearing locating lugs will be on exhaust side of engine, and arrow on piston head will face toward front of engine.
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