What happened to fact (notion?) that different metals expand/contract at
different rates?

Mike

> It is very easy to see that you've never heated a crank timing gear and
> dropped it onto a freshly turned crank.
> I'm outt'a this...............
> You guys pick your nits alone.
>
> Stan Wilder
> http://www.engineceramics.com/
>
>
> ----- Original Message -----
> From: "Daniel L. Katz" <katzd54@YAHOO.COM>
> To: <vanagon@GERRY.VANAGON.COM>
> Sent: Sunday, June 27, 2004 11:00 PM
> Subject: Re: Hydro lifters (# of turn)
>
>
> > yes, but the whole engine, including all the gaps and holes, expand with
> > increasing temperature. if all the materials were the same, and the
> > temperature was uniform throughout the engine, then the gap would expand
> > by exactly the same percentage as the overall expansion of the engine;
and
> > there would be more than .006 lash. there might be a differential
thermal
> > expansion going on because of different materials and temperature
> > differences, and maybe that is what is going on, but it is a little
> > surprising.
> >
> > the idea is the same as heating a metal plate with a hole punched out.
the
> > plate and hole must expand by the same percentage. maybe the easiest way
> > to prove that statement is to imagine also heating the piece that was
> > punched out. it obviously exdpands, and should be just the right size to
> > fit the expanded hole in the heated sheet.
> >
> > dan
> >
> > On Mon, 28 Jun 2004 10:19:53 -0500, Stan Wilder
<wilden1-1@SBCGLOBAL.NET>
> > wrote:
> >
> > >It's the heat that expands the steel parts.
> > >The various parts just expand and consume that .006.
> > >Various parts = Lifters, Rocker Arms, Valve Stems, Pushrods, valve
seats.
> > >Check out .006 on a feeler gauge, it's about 1/2 as thick as typing
> paper.
> > >
> > >Stan Wilder
> > >