valve seats

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older style stone with holders along side more modern carbide cutters. pilot and spring along with suction type lapping tool and prussion blue shown on bench.

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adjustable stone dresser. used to clean up existing angle of a stone or grind a specific angle.

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grinding seat. pilot installed in guide, then a bounce spring added and then the holder with stone which is driven by the electric sioux motor.

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One method to test the seat/valve sealing is to first add enough mineral spirits to cover the seating junction while holding the valve down with light pressure and apply high pressure air with a blow gun either in the intake or exhaust port and direct it around the seat/valve seal area. Any leak shows up as bubbles and will require additional work.

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assembled testing using a vacuum pump.

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