Camshaft Nut Versus Bolt Style

[roblav]

My 1976 engine came with the usual cam nuts. I'm replacing the cams with the bolt style. Are there any other parts I need besides two bolts and two washers? I've rebuilt both styles but never had to swap. Thanks much. RL

[Flat6pac]

There is a specific washer used with the bolt that covers part of the pin when assembled.
The bolts are specific 12mmx1.5,x 50mm
Bruce

[jpnovak]

Yes, specific washer to cover the pin.

I would keep the 46mm nut style. Way easier to me to set cam timing and maintain when torqueing. I don't like how you can not independently hold the actual cam when tightening the bolt.

[VFR750]

Originally Posted by jpnovak

Yes, specific washer to cover the pin.

I would keep the 46mm nut style. Way easier to me to set cam timing and maintain when torqueing. I don't like how you can not independently hold the actual cam when tightening the bolt.

The tool used to hold the sprocket does not hold the cam directly. The big sprocket is timed to the smaller sprocket with a pin. The smaller sprocket is keyed to the camshaft. Some inherent tolerances make it imperfect.

However this arraignment and holding tool makes it very easy to hold the cam drive hardware while torquing the bolt.

You do have to fiddle with pin location to get the timing right. Use the accepted +/- 0.1mm tolerance band to avoid too much fiddling for perfection on cam timing.

I think you also need the correct chain sprockets and the smaller drive sprocket and key

[boyt911sc]

Originally Posted by VFR750

The tool used to hold the sprocket does not hold the cam directly. The big sprocket is timed to the smaller sprocket with a pin. The smaller sprocket is keyed to the camshaft. Some inherent tolerances make it imperfect.

However this arraignment and holding tool makes it very easy to hold the cam drive hardware while torquing the bolt.

You do have to fiddle with pin location to get the timing right. Use the accepted +/- 0.1mm tolerance band to avoid too much fiddling for perfection on cam timing.

I think you also need the correct chain sprockets and the smaller drive sprocket and key

VFR,

Switching camshafts do not require switching the camshaft sprockets, sprocket flanges, and woodruff keys.

Tony

[roblav]

Thanks Guys. I bought new bolts and washers. Everything looks like it should go back together as normal without any other parts.