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Dave,
I had my machine shop replace the valve guides on all my Triumphs with
bronze guides sourced at TRF. In addition they added ss valve seats for
the exhaust so I could use unleaded without the additive. Zero problems
with the 4 which is over 20 years since rebuild. 3 10 years and same
with the 6, No smoke and almost zero oil usage. I doubt a leak down test
would reveal bad guides. What do the plugs look like? If there is oil
foul they would appear black and greasy. But you could have bad rings,
the oil scraper may be bad.
Bob
On 11/11/21 9:56 AM, dave wrote:
>
> I have a friend who has a 74 TR6. Recent rebuild of the engine both
> top and bottom. We are a little suspicious of the machine shop that
> did the head. The bottom end was done a year later by a different
> machinist.
>
> All pollution stuff is gone.
>
> Compression across all 6 cylinders is within a couple PSI
>
> Leakdown test was a small % on all cylinders
>
> Engine uses a lot of oil and there is a blue puff when he accelerates
> or engine brakes
>
> We think its likely the valve guides are leaking.
>
> What do you think?
>
>
> ** triumphs@autox.team.net **
>
> Donate: http://www.team.net/donate.html
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<p>Dave,</p>
<p>I had my machine shop replace the valve guides on all my Triumphs
with bronze guides sourced at TRF. In addition they added ss valve
seats for the exhaust so I could use unleaded without the
additive. Zero problems with the 4 which is over 20 years since
rebuild. 3 10 years and same with the 6, No smoke and almost zero
oil usage. I doubt a leak down test would reveal bad guides. What
do the plugs look like? If there is oil foul they would appear
black and greasy. But you could have bad rings, the oil scraper
may be bad. <br>
</p>
<p>Bob<br>
</p>
<div class="moz-cite-prefix">On 11/11/21 9:56 AM, dave wrote:<br>
</div>
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<div class="WordSection1">
<p class="MsoNormal">I have a friend who has a 74 TR6. Recent
rebuild of the engine both top and bottom. We are a little
suspicious of the machine shop that did the head. The bottom
end was done a year later by a different machinist.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">All pollution stuff is gone.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Compression across all 6 cylinders is
within a couple PSI<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Leakdown test was a small % on all
cylinders<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Engine uses a lot of oil and there is a
blue puff when he accelerates or engine brakes<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We think its likely the valve guides are
leaking.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">What do you think?<o:p></o:p></p>
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<br>
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