Thread: sbc 400 2-bolt main

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I was curious about the cracks and tried to zoom in and crop the pic. The cracks seem to have a circular shape to them before they get to the cylinder. Let's see if this worked..

I guess I could've made it larger still... but you can see the circles below the bolt holes.. Still curious.. LOL..

Originally Posted by 34_40

I was curious about the cracks and tried to zoom in and crop the pic. The cracks seem to have a circular shape to them before they get to the cylinder. Let's see if this worked..

I guess I could've made it larger still... but you can see the circles below the bolt holes.. Still curious.. LOL..

Those are the steam holes Jerry is talking about, they have been plugged here. I tap my holes and stick an allen screw in there. I tap those big holes above the stud as well and have pipe plugs in there with 1/4" holes drilled in them for water/steam.