SB engine gurus...please step inside

[Jac Mac]

You have a one piece eccentric--you have been supplied with a cam equipped with a short dowel that is intended for a two piece eccentric ( tang type ).

Remove that dowel--usually a large set of side cutter pliers will suffice, using the gear spigot of the cam for leverage.

Buy & fit the correct (longer) dowel.

Clean the gear retaining bolt threads along with those in the cam ( check the length of that bolt to ensure it is not to long along with the correct thread--- some later cams use a 7/16 thread rather than 3/8 IIRC.

The single piece eccentric also uses a thick washer that prevents the dowel moving forward once all fitted up. A drop of loctite on the bolt thread when finally fitted & torqued to 36 ft/lb is good insurance.

The gear set for a two piece eccentric usually has a raised lip in center that allows the outer ring to turn freely once fitted.

[RedBarchetta]

Originally Posted by Jac Mac

You have a one piece eccentric--you have been supplied with a cam equipped with a short dowel that is intended for a two piece eccentric ( tang type ).

Wonderful...So how come this lasted as long as it did? Was there just enough of the cam dowel showing through the gear to grab the eccentric before it receeded back into the camshaft?

Originally Posted by Jac Mac

Remove that dowel--usually a large set of side cutter pliers will suffice, using the gear spigot of the cam for leverage.).

Not sure I follow you on using the gear spigot for leverage.

Originally Posted by Jac Mac

Buy & fit the correct (longer) dowel.).

Where can I source this? Machine shops? Hardware store?

Originally Posted by Jac Mac

The gear set for a two piece eccentric usually has a raised lip in center that allows the outer ring to turn freely once fitted.

So what you're saying is that I can't just install a two piece like what should have been there to begin with?

I'm going to try to post a pic tonight.

Thanks,

-Dean