i'm not sure about your diagnosis, but while the head is out, you might want
to shave it a bit and port it as well . . . .
the 74 had lowered compression for emissions.
----- Original Message -----
From: "Paul Mitchell" <paul@cynthesys.co.za>
To: <triumphs@autox.team.net>
Sent: Monday, December 05, 2005 2:21 AM
Subject: TR6 valve seats
> Listers,
>
> My mechanic has been trying and failing to fix a persistent
> mis/back-fire on my TR6. Have changed or fixed everything he can think
> of, he reckons that it may be a cracked valve seat. The car pops and
> spits a few times when it's cold, then idles unevenly, and no. 2
> cylinder is apparently cooler than the others. Other than that it seems
> to be fine. Does his diagnosis sound reasonable?
>
> If it does sound fair, then what is involved in fixing it, given that
> while I've got the head off, I might as well prepare for unleaded fuel?
>
> Thanks
>
> Paul
> 74 TR6 PI
> Cape Town
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