mass-hole wrote:
I wanna know why they wouldnt key the cam gears to the slots in the cam shafts. Seems like a silly oversight. that would make it so all you had to do was align the gears with your marks you made prior to disassembly instead of having to worry about the cams having moved and the cam gears just bolting on at any angle.
I read somewhere VM did this so when you tension the cam belt with the cam gears bolts loose and the crankshaft pinned, it allows the cam gears to move independently and rotate while the cams remain stationary... But I also agree with you, I have done hundreds of timing belt jobs and the cam gears were always keyed or dowel pinned to the cam... Seems like it would have been much similar to just keyed them to each other (cam & gear). There are zillions of dual overhead cam vehicles in service today all over the world with the cam gears keyed or doweled to the cam!!!
mass-hole wrote:
Has anyone noticed that there was still some rotational play in the gates locking pins for the cams or was the just me?
Yes I noticed the slight movement allowed even with the cam indexing pins in place when I performed my timing belt job. I thought then and still feel it is not a real accurate method of timing an engine. Guess it is like Sir Sam said; "Close enough is good enough method"
Gosh, back in my racing days, we would use dial indicators and degree wheels to set up crankshaft to cam timing to ensure accuracy. And believe me, a few degrees one way or the other (+or-) could make a real difference on engine power output!!! They even make offset keyways up to +/- 3 degrees for this purpose...
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