SBC Cam Button & Balancer Question

[billscamaros]

I've pulled the 350 engine from my '52 Chevy pickup. It's been a strong running engine, so I'm just replacing gaskets and installing a new oil pump.

Two questions for you guys ......

I pulled the timing chain cover and notice that there isn't a cam button installed? Should there be? Do all cams have cam buttons? If so, are there different thicknesses? Does the button ride against the timing chain cover? Is there a specific lube that goes along with it? I assume that the button would keep the cam from "walking" back and forth?

Second question involves the harmonic balancer. I notice that the keyway of the balancer and the timing notch are not lined up. Should they be in line? I believe that the answer is yes.

And a third question, I guess. The timing chain sprockets are installed "straight up". I have the option to advance the timing by 4 degrees. Good choice? This will just be a street driven, semi daily driver truck.

Thanks

Bill

[HILROD]

Flat tappet cams do not usually use a cam button. It is not needed. The balancer might have spun the outer, the rubber breaks down over time. Or it could just have mis-matched years of balancer and front cover. Last I don't know if I'd advance the cam that much without a degree wheel. Advancing or retarding the cam just moves the power band around. It will take away power from down low and move it higher, or vice versa.

[buns]

Second question involves the harmonic balancer. I notice that the keyway of the balancer and the timing notch are not lined up. Should they be in line? I believe that the answer is yes.



Bill

Pre '69 balancers have the timing mark 2 degrees before the keyway centerline. '69 and up, timing mark is 10 degrees before the keyway centerline. You can use either balancer as long as you have the matching pointer.