Difference between hyd flat tappet and hyd roller cam?
I’m asking this question because I often get confused as I’m attempting to fix/upgrade/repair my 67 Dart. Currently I’m installing a new timing set and chain due to chain slack/wear. I noticed in the Cloyes timing gear set I ordered there was a three bolt cam gear and a cam thrust bearing. The problem was that my original mopar performance cam in my 383 is a one bolt cam. Therefore I couldn’t use my three bolt Cloyes cam gear. No problem I inspected my single bolt cam gear teeth look good and it measure out at the same exact size as my three bolt. I’ll just put it back in instead. Then I couldn’t figure out where to put the cam thrust bearing included in the kit? I didn’t remember seeing one when I pulled off the lower crank gear? After reading a bit I think I know why. With traditional flat tappet hydraulic cams based on the lobes and the clockwise revolution of the cam it doesn’t want to walk forward but instead move back. Therefore a cam thrust bearing isn’t needed as well as a cam button for the timing cover. Only when you move to a hyd roller are those things needed because the cam can walk forward. Do I have it correct everyone?
Carl
I’m asking this question because I often get confused as I’m attempting to fix/upgrade/repair my 67 Dart. Currently I’m installing a new timing set and chain due to chain slack/wear. I noticed in the Cloyes timing gear set I ordered there was a three bolt cam gear and a cam thrust bearing. The problem was that my original mopar performance cam in my 383 is a one bolt cam. Therefore I couldn’t use my three bolt Cloyes cam gear. No problem I inspected my single bolt cam gear teeth look good and it measure out at the same exact size as my three bolt. I’ll just put it back in instead. Then I couldn’t figure out where to put the cam thrust bearing included in the kit? I didn’t remember seeing one when I pulled off the lower crank gear? After reading a bit I think I know why. With traditional flat tappet hydraulic cams based on the lobes and the clockwise revolution of the cam it doesn’t want to walk forward but instead move back. Therefore a cam thrust bearing isn’t needed as well as a cam button for the timing cover. Only when you move to a hyd roller are those things needed because the cam can walk forward. Do I have it correct everyone?
Carl
