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Home >> BMW >> 1971 >> 3.0CSi Not Available Trans >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Mechanical >> BMW Engines - 2500, 2800, 3.0 & BAVARIA 6 Cylinder >> Timing Chain Replacement

Timing Chain Replacement

  1. Rotate crankshaft until number one cylinder is at TDC of compression stroke. Rotor should point to notch in distributor. Remove front engine covers as previously outlined. Mark front side of timing chain for installation.
    Fig 1: Timing Chain Installation
    G09325565Courtesy of BMW OF NORTH AMERICA, INC.
  2. Bend over lock tabs and remove camshaft sprocket with timing chain. Timing chain is pre-stretched and significant wear should not be apparent before 30, 000 miles. Replace sprockets if worn or damaged.
  3. To replace crankshaft sprocket, remove oil pan, oil pump sprocket and chain. Remove Woodruff key and "O" ring and pull off crankshaft sprocket with a suitable puller (No. 7006). To install, reverse removal procedure. Adjust oil pump chain tension. See OIL PUMP REMOVAL .
  4. To install timing chain, reverse removal procedure, making sure number one cylinder is at TDC of compression stroke. Line up tapped hole in sprocket hub with cast protrusion in cylinder head and install timing chain and sprocket.
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