I went to see an engine reconditioning specialist to show him my valve seat problem he told me that the problem was a lack of tightening of the valve seat in the cylinder head and that apparently the valve seats were not fitted in the correct order, the correct order is to machine first to insert the intake valve seat after machining for the exhaust seat by biting slightly into the intake seat, apparently the one who did for S&S worked in reverse order, so I will extract the valve seat to have metal replaced with laser welding then he will machine the seat housing by making the reverse embedding in the intake seat.
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