<VV> Re: Holding a Valve Seat ?

[John Dozsa]

>    Date: Tue, 8 Feb 2005 15:40:37 EST
>    From: bobhelt@aol.com
> Subject: Re: Holding a Valve Seat ?
> 
> In a message dated 2/8/05 1:30:06 PM US Mountain Standard Time,
> burnnvair@yahoo.com writes:
> 
> > I may be missing the the mark,  I thought the fix was
> > staking the seat ... or should I say rolling the
> > aluminum to lock the seat in. It seems a press fit
> > alone, no matter the alloy or heat treating of
> > aluminum will expand and contract differently than
> > steel. Even if the seat come loose it won't pop out
> > and wipe the motor.
> >
> 
> No, Staking just doesn't work according to many people's experiences over 40
> years.
>  And there is no way to roll the alum to lock in the seat with all normal and
> standard type seats.
> Regards,
> Bob Helt

How about the set screw technique, half in the seat, half in the head? 
Does it work?  Is there a problem with the set screws coming out?  Is
there a set screw material that expands faster than the head and seat? 
It would lock itself in as the temperature increased.

John Dozsa