Date: Mon, 7 Sep 2015 07:39:32 -0700
Reply-To: Don Hanson <dhanson928@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Don Hanson <dhanson928@GMAIL.COM>
Subject: Re: Pop Top hinge loose?
In-Reply-To: <CAE_mVa3zVWEUC65OmSTnfasrNGLUTTS5iqM08uDCi+K+Fsn1zw@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8
With digital phones and cameras available everywhere now, you might
think of some way to use that technology to find the offending fault...
Fix some recording device at your problem and go drive around, then check
the recordings...
A very savvy and smart engineer-friend found a design flaw in the
Porsche 928 by doing that....It seems the 4 cams were not draining enough
of the 'oil mist' out of the overhead cam galleries during sustained
high-speed operation, leading to oil starvation at the main bearings...and
frequent #4/6 main bearing failure was a common occurrence. He installed
a lip stick camera in one of the cam galleries and recorded during a visit
to Thunderhill raceway, which has a looong very high speed sweeper left
hand corner...He discovered that about half way around that long left, turn
2, the oil level in the cam gallery he was watching rose up and covered the
camera completely! rather than being returned quickly enough to the lower
end and the main bearings. Fairly easy to fix, once he figured out the
actual problem....
Surprising how some problems are only apparent once you are moving...and
very difficult to trace down.
On Mon, Sep 7, 2015 at 5:05 AM, Michael McSwain <michaelmcswain@gmail.com>
wrote:
> Right on. It is a bit confusing. Can't see a single loose screw but I'm
> pretty sure it's coming from the hinge. Maybe you could hang on the roof
> rack while I get up to speed on a bumpy road and see if it stops? ;)
>
> On Mon, Sep 7, 2015, 8:00 AM Ryan Perry <rjdperry@gmail.com> wrote:
>
> > Michael, let me know if you want some help tracking it down. We can
> rattle
> > that to all day!
> >
> > On Fri, Sep 4, 2015, 9:07 AM Jim Felder <jim.felder@gmail.com> wrote:
> >
> > > I have a great set of hinges if you need them, but you probably just
> need
> > > bolts. Maybe something else is rattling up there, pop the top and see
> > what
> > > else may be loose.
> > >
> > > Jim
> > >
> > > On Fri, Sep 4, 2015 at 7:51 AM Michael McSwain <
> michaelmcswain@gmail.com
> > >
> > > wrote:
> > >
> > > > Noticing some significant rattle from the back and I've tracked it
> down
> > > to
> > > > the drivers side pop top hinge. I can easily lift that side up where
> > as
> > > > the passenger side is nice and tight. I've looked at all of the
> > > nuts/bolts
> > > > that I can see and all of them seem to be nice and tight. Anybody
> have
> > > any
> > > > experience with this? Don't see new ones anywhere.
> > > >
> > > > Thanks for any feedback.
> > > >
> > > > Michael.
> > > >
> > > > --
> > > > m.
> > > >
> > >
> >
>
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