Inliners International Forums General Discussion Engines 250 chev sounds like rod knock. Timing gears?

Some one has put the cam gear on with a hammer or press instead of heating it. This will shave some aluminum out of the gear so it will not be tight enough. The gear will slip forward just enough to let the cam move back to let the crank journal or rod to hit a cam lobe. Sounds just like a rod. Always heat the aluminum gear enough to not have to press it on,just light taps with a hammer will seat it. Hope this helps.