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REGRINDING CAMS AND LIFTERS

REGRINDING CAMS AND LIFTERS. I do not recommend using reground cams I do not recommend using reground lifters. ROLLER CAM AND LIFTERS. Roller lifters can accept higher lift rate without wear Roller lifters reduce valve train friction

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REGRINDING CAMS AND LIFTERS

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  1. REGRINDING CAMS AND LIFTERS • I do not recommend using reground cams • I do not recommend using reground lifters

  2. ROLLER CAM AND LIFTERS • Roller lifters can accept higher lift rate without wear • Roller lifters reduce valve train friction • Roller lifters must have a way of keeping them from turning

  3. ROLLER CAM AND LIFTERS • Roller Cams are made of steel (not cast iron) • Roller Cams have more agressive Profiles • Lobes are polished to a fine matte finish • After break-in, the lobe has a mirror finish

  4. CAM DRIVES • The Camshaft is Driven by the Crankshaft • Cam is driven at one half Crank speed • Gear • Chain and Sprockets • Belt and sprockets

  5. CAM DRIVES - GEARS • Cam gear is soft - Fiber or Aluminum • Are press fit to cam - Pre-heat to 200 degrees to install • Crank gear - Steel • Advantages - Less wear and Backlash • Disadvantages - Takes more space and can be noisey

  6. SPROCKETS • Used with chains can be made of • Steel • Iron • Aluminum (Nylon coated teeth) - can stick oil pump relief valve • Do Not use a worn Sprocket with a New Chain

  7. TIMING CHAINS • Roller Chain (bicycle style) • Silent Chain - 2 styles • Small Pin - Stiff • Large Pin - Limp

  8. TIMING BELTS • Cogged Belt Drive • Advantages Lighter, Quieter, Easier to Change • Virtually no streach in service • Watch rib tooth shape - Rounded or Square

  9. TIMING BELTS • Replacement 30,000 to 60,000 miles

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