Keith
Just noticed a big over sight on my behalf, I copied the response to someone
with a spit and neglected to notice that you list a TR6 please use the
valves for no6 cylinder that's valves 11 and 12
Graham.
----- Original Message -----
From: Keith Ehrlich <kehrlich@bellatlantic.net>
To: Graham Stretch <technical@iwnet.screaming.net>
Sent: Saturday, April 01, 2000 12:26 AM
Subject: Re: TR6 Timing chain sprockets
> Thanks thats very helpful. Valves 7 and 8 are for piston #4 from the
front? (
> pardon my naivete-learning on the hoof here....I will also pass on your
comments
> about how to get 1/2 tooth to an acquaintance who decided a vernier device
was
> needed to accomplish the same.
>
> BTW why can't the double chain ( like mine) be reversed?
>
> Keith
>
> Graham Stretch wrote:
>
> > Hi Keith
> > The best technique I have used is to disregard the timing marks for the
cam,
> > set the crank to tdc, set the cam so that the rockers for valves seven
and
> > eight are on the rock, I think it is recommended that the gaps are set
to
> > 0.040" for these two valves before you start work, then using feeler
gauges
> > check the clearances until you have equal gaps on these two rockers. now
fit
> > the chain to the sprockets and play until you have the two bolt holes in
> > line. I recommend this technique as I have found that some of the
factory
> > timing marks are less than perfect! don't forget you can get 1/2 tooth
> > adjustments by turning the cam wheel 180 degrees and 1/4 tooth
adjustment by
> > some combination of turning the wheel so the other side faces out. (only
> > with simplex chain, if you have duplex chain you cannot flip the wheel!)
> >
> > Graham.
> >
> > ----- Original Message -----
> > From: Keith Ehrlich <kehrlich@bellatlantic.net>
> > To: <triumphs@autox.team.net>
> > Sent: Tuesday, March 28, 2000 11:29 PM
> > Subject: TR6 Timing chain sprockets
> >
> > >
> > > I have gotten into the chain and sprockets and can't find anything
that
> > > remotely looks like an alignment indicator-no dimples, scratches or
the
> > > like. Are these marks clearly visible on a factory original engine and
> > > if so, does that mean perhaps the sprockets, and maybe chain, were
> > > replaced by a PO? One hint is that the car ran best when road timed,
and
> > > the resultant dynamic timing was around 23 degrees BTDC, which always
> > > made me wonder if someone put it back together slightly out of
> > > alignment..
> > >
> > > If I replace the sprockets and chain, I will have to get the pistons
and
> > > cam aligned again, because I don't have any alignment marks to follow
> > > and the existing alignment may be wrong anyway.
> > > How would I do this?
> > >
> > > Also, should a new tensioner be installed?
> > >
> > > Keith
> > > 74 TR6
> > >
>
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