My home inspection of Speedmaster heads
and one head back together... About 3+ hrs to take one apart (and mark), smooth out the burrs, clean thoroughly, and reassemble. The exhaust valve marked "D" is about .008-.010 higher (at valve stem) than the rest (the rest are equal) with a flat edge.
and one head back together... About 3+ hrs to take one apart (and mark), smooth out the burrs, clean thoroughly, and reassemble. The exhaust valve marked "D" is about .008-.010 higher (at valve stem) than the rest (the rest are equal) with a flat edge.