How To Check Valve-To- Piston Clearance
Next, we tried a much larger aftermarket aluminum big-block cylinder head with 2.300/1.88-inch intake and exhaust valves. The first thing we discovered was that the large intake valve hit the piston just before the piston reached top dead center (TDC). We hand-filed the area, but this moved the interference to the crown of the valve relief in the piston. This would require milling larger valve reliefs. View Related Article
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