All--
Having been a willing captive of Michael's when we did the 2008 and 2009 *Targa
Newfoundland* rallies I have had this explained to me in person, and it's
difficult to win an argument with Michael.
OTOH the fellow who does the heads on my race cars feels that bronze guides
offer some advantages, at least for racing applications. He simply allows
for the different coefficients with a couple of extra thousands of
clearance and I have not yet stuck a valve with bronze guides...(fingers
crossed).
Best--Michael Oritt
On Sun, May 27, 2012 at 7:27 AM, Michael Salter <michaelsalter at
gmail.com>wrote:
> Hi Robert,
> The mechanics of the problems with bronze guides in cast iron heads is
> explained in my blog post
> http://www.netbug.net/blogmichael/?p=384
> Probably worth reading.
>
> --
> Michael Salter
>
> *I have BJ8 water pump kits!!*
>
> On Sun, May 27, 2012 at 3:15 AM, Robert Blair <rnbmail at yahoo.com> wrote:
>
> > Listers....Saw this recently in my area ...
> > Does anyone have experience with this problem and what happened and what
> > was
> > your conclusion???
> >
> > PROBLEM:
> > Motor with under 5K miles since full rebuild - never over rev'd.
> > One pushrod jumped out from rocker ball - expected nasty noises...
> > Tappet adjustment nut was tight after jump.
> > Pushrod slightly bent - as expected, but not enough to permit jump.
> > No follower damage.
> > No valve or piston damage.
> > Compression maintained.
> >
> > SOLUTION:
> > Replaced pushrod and tappet screw.
> > Motor runs just fine.
> >
> > What happened and why?????????
> > Opinions please ..............
> >
> > Robert N. Blair Yellow 65BJ8 RNBmail at yahoo.com
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