15-07-2021, 11:48 AM
(This post was last modified: 15-07-2021, 12:14 PM by Tony Griffiths.)
What Dave Mann in his modesty failed to mention is that he spends an afternoon or two carefully lapping the top of the crankcase to a ground-finished, 3/4" thick steel plate. On the camshaft side of the crankcase he often finds the distortion (fretting) can be severe and, to remove this, sometimes means taking off so much metal that the engine number (stamped on the off-side) almost disappears. The base of the block is surface ground and the result, with a paper gasket, is an engine that never leaks oil from the block-to-crankcase joint. The devil, as always, is in getting the details right.