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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [xj-s] Setting the Record Straight
Kirbert wrote: > . > > Bywater says the industry standard for tightness of valve seats was > developed by Phil Irving, engine chief at Vincent Motor Cycles: > 0.0015 -0.002" interference per inch of diameter. Hence, the .003" > is right in line, apparently. > > So, let's start the discussion over! Is the .003" good enough, or > are we gonna come up with our own spec? > > BTW, Bywater also clarifies that the seat should NOT, under any > circumstances, be "pressed" in. That would shave some aluminum off > the head, not only making it loose but preventing the seat from > sitting all the way to the bottom of the hole. The seat must be > installed by heating the head, as specified in the manual. > > -- Kirbert | If anything is to be accomplished, > | some rules must be broken. > | - Palm's Postulate Do they have any good machine shops in Florida? I would imagine there is one somewhere that could the job correctly. It is all up to the machine shop to do the job correctly.Or are you going to do this job yourself? As to the question of the other seats in the head how in the world would anyone tell how tight they are.Do them all then you will know. Jim Schultetus References:
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