Timing Breakdown - 09/28/2021

Things are a little nerve-racking tonight. The old timing chains come completely off which serve as the link to synchronize all 4 cams with the crankshaft. Since the crankshaft is loose (a condition of mounting the engine to a stand), it will be important not to let it rotate and move away from TDC until it can be locked again. Thankfully, it's a pretty happy spot for the crankshaft to be so I didn't have any trouble with it trying to spring away from this setting.

  • Started cleaning lower timing cover
  • Removed VANOS sensor wheels (left hand thread)
  • Compressed secondary chain tensioners
  • Loosened exhaust cam sprockets (left hand thread)
  • Loosened intake/vanos cam sprockets (left hand thread)
  • Installed CAM blocks
  • Removed tensioner guide rail
  • Removed stationary guide rail
  • Removed primary timing chain
  • Removed U guide rail
  • Removed exhaust cam sprockets
  • Removed secondary chain tensioners
  • Removed intake/vanos cam sprockets
  • Removed secondary chains
  • Installed new oil separator + crank case breather tube
  • Removed VANOS distribution housings, camshaft sealing rings, check valves, and housing gaskets.
  • Reinstalled VANOS distribution housings with new camshaft sealing rings, check valves, and housing gaskets. Tightened to 90in-lbs
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