Seat Correction Angles

Measure seat contact width on valve. See VALVE SEATS. Ensure valve/seat contact position is at center of valve face. If width and position are not within specifications, cut seats as follows:

• On 323, if seat contact position is too high, correct with 75-degree cutter stone. Finish angle with 45-degree cutter until contact width is corrected. If seat contact position is too low, correct with 35-degree cutter for intake seat and/or 15-degree cutter for exhaust seat. Finish angle with 45-degree cutter until contact width is corrected. Seat valve to valve seat with lapping compound.