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Fw: TR4 Rocker Shaft Wear

To: <fot@autox.team.net>
Subject: Fw: TR4 Rocker Shaft Wear
From: "T.R. Scratchings" <wob@dandrade.freeserve.co.uk>
Date: Mon, 15 Sep 2003 23:31:18 +0100
----- Original Message -----
From: "T.R. Scratchings" <wob@dandrade.freeserve.co.uk>
To: "Peter Vucinic" <vucinic@b140.aone.net.au>
Cc: <fot@autox.net>
Sent: Monday, September 15, 2003 3:58 PM
Subject: Re: TR4 Rocker Shaft Wear


> Check valve spring loading at full lift.
> Fit roller rockers (std. or 1.75:1), which use a larger diameter and very
> hard shaft. ;>}
> Jon Wood
> ----- Original Message -----
> From: "Peter Vucinic" <vucinic@b140.aone.net.au>
> To: "FOT" <fot@autox.team.net>
> Sent: Monday, September 15, 2003 2:07 PM
> Subject: TR4 Rocker Shaft Wear
>
>
> > Gentlemen,
> > I am hoping that some one on the list has gone there before me on this
> one! I
> > am not happy with the wear on my "tuff trided" rocker shaft which is a
> MOSS UK
> > item. The shaft has 2-3 thou wear over a couple of thousand miles. I can
> only
> > assume that the shaft is/was hardened. I know oil supply is not an issue
> as I
> > run an external feed line and the rocker arm bushes are in pretty much
> perfect
> > condition.
> >
> > I must admit that my rocker arms do not use the STD bushes. I modified
the
> > arms to utilise an off the shelf oil impregnated bronze bush and this
may
> have
> > contributed to the wear, as these bushes have slightly more surface area
> than
> > the STD's. However, I did grind more & deeper oil grooves on the shaft
> > directly inline with each rocker bearing. Maybe I needed to machine a
> groove
> > all the way around shaft which, is one option I am considering for the
new
> > shaft.
> >
> > Does anyone have a positive experience with an alternate/different
supply
> for
> > this item? Or does someone have a "better fix" for this problem.
> >
> > Thanks in advance
> >
> > Kind Regards
> > Peter Vucinic
> > WORKS-4
> > TR-4

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