cam drive gears
Posted: Mon Feb 05, 2018 11:12 pm
I have nearly completed my engine rebuild, the cam drive gears have had the quietner gears removed and the pins have been tack welded back into place. The gears are the original ones that were always fitted to the race engine but due to a big end failure i have installed a good condition crank from a road engine i had spare. The gear assembly's were marked faintly front and rear so installed them back onto the correct cylinders. After torquing the cylinder head bolts i noticed that the front gear assembly had slight play i.e i could rotate the gear for and aft slightly i checked the crank pinion and the play was between the lower gear meshing with the crank, the rear cylinder gear when bolted down has no play at all.
Firstly am i better using the drive gears from the road engine even though they have the quietner gears on as the bottom gear will be mated to the crank gear better or am i over reacting.
I am not sure whether the slacker fitment is how it should be or whether the tighter fit is correct, either way they dont feel the same one has slight movement the other gear has none.
It worries me that the person who removed the quietner gears didnt get the gear exactly in the right place before tack welding i.e either lengthening the mesh of the gears slightly or shortening.
Any advise will be greatly received
Ian
Firstly am i better using the drive gears from the road engine even though they have the quietner gears on as the bottom gear will be mated to the crank gear better or am i over reacting.
I am not sure whether the slacker fitment is how it should be or whether the tighter fit is correct, either way they dont feel the same one has slight movement the other gear has none.
It worries me that the person who removed the quietner gears didnt get the gear exactly in the right place before tack welding i.e either lengthening the mesh of the gears slightly or shortening.
Any advise will be greatly received
Ian