hi Fab, i am not trying to generate a seat as such, just confirming a uniform contact. As i said, just a dab is enough, the sound a seat and valve makes when they come in if they are good is almost instantaneous, you can hear it. If you are rubbing, stop, it is not right.
Like all tests, if you are capable of doing it yourself, or can trust someone, the results should always be the same regardless.
Just got a set of fuel heads sent to me that had apparently been attended to by a ......reputable shop.... seats were supposed to be 50° in and ex,, one ex cut to 45° ,inlet cut to 50° but .035" deeper than spec, [=2.8cc] when springs were removed we could see daylight past the seated inlet, knew something was up when i had to pop the in of the seat, these passed a solvent test when assembled, hate to have seen what could have eventuated after a couple of passes. And, they would have been judged by the 'last guy touched it rule'. Me.
Really, there are more ways to skin a cat than you would think, if your results give reliable repeatable service in your endeavors, stick to it.
You do not have the required permissions to view the files attached to this post.