Post on 31-Dec-2015
description
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 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
ROLLER CAM AND LIFTERS
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
CAM DRIVESCAM DRIVES
The Camshaft is Driven by the Crankshaft
Cam is driven at one half Crank speed Gear Chain and Sprockets Belt and sprockets
CAM DRIVES - GEARSCAM 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
SPROCKETSSPROCKETS
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
TIMING CHAINSTIMING CHAINS
Roller Chain (bicycle style) Silent Chain - 2 styles Small Pin - Stiff Large Pin - Limp
TIMING BELTSTIMING BELTS
Cogged Belt Drive Advantages Lighter, Quieter, Easier to
Change Virtually no streach in service Watch rib tooth shape - Rounded or
Square
TIMING BELTSTIMING BELTS
Replacement 30,000 to 60,000 miles