[TR] TR6 issue

[Bob]

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?
>
>
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