[6pack] Engine restoration, abbreviated

[Greg Lemon]

Richard,

I have enjoyed the story of your TR6 ressurection.  When I did my TR250
motor I did tear it down, a 90,000 plus mile car, the machinist polished
the crank, and honed the notes.  I put on new rings and bearings.  Point
being you may be on the right path leaving it alone, they can apparently do
considerable miles without too much wear.

One note, don't forget to check crank float or end play.  The thrust
washers on the crank are a known fail point.  I seem to recall they can be
replaced by dropping the pan and sliding the bearing out.

Greg Lemon
TR250

On Tue, Aug 13, 2019, 8:07 PM Richard Lindsay via 6pack <
6pack at autox.team.net> wrote:

> Hello again Friends,
>    The following is an abbreviated story, with pictures, of the
> resurrection of my TR6 engine. The car hadn't run in decades, I am told,
> but the engine looked pretty good. Here's a first look.
>
> http://aubard.us/75_Triumph/P1000408.JPG
>
>    First step was to pull the plugs, squirt in about 1cc of oil, and turn
> the engine over by hand. Everything turned smoothly. I next changed the oil
> and filter, connected a battery, pulled the fuses out, and spun the engine
> for a second or two on the starter. Everything turned smoothly.
>    Next step, a compression test. Given a 1975 U.S. specification engine
> with a compression ratio of 7.75:1, the perfect static pressure would be
> about 114psi. My engine's initial (cold) compression readings are:
>
>
>
>
>
>
> *1  115 psi 2  106 psi 3  103 psi 4  111 psi 5  102 psi 6  111 psi*
>
>    Considering that this engine hadn't run in ages and the condition of
> the valve and their seats was unknown, I decided to *not* open the engine
> unless further tests indicated that doing so was warranted.
>    I next removed the valve cover and found a clean rocker shaft and
> springs. And with the cover of off, I cleaned and refinished it. Lots of
> other bits got cleaned and refinished at the same time.
>    The waterpump and thermostat were replaced. All hoses are new. The
> radiator was flushed and pressure tested. A new fan belt was installed and
> the cooling system was flushed.
>    The Z-S carbs were rebuilt and reinstalled on new gaskets. The fuel
> line was disconnected and flushed clean. The tank was boiled out and no
> corrosion was found.
>    Earlier I posted a picture or two of the electric fuel pump I used.
> Here's one of the pictures again.
>
> http://aubard.us/75_Triumph/20190722_091448.jpg
>
>    I removed all the non-functional emissions bits including the air
> injection plumbing. The pipe fittings on the manifold were not coming off
> by any means known to man so...I sawed off the pipes and plugged them with
> bolts and ultra high temperature cement. Here's how they looked before
> 'surgery'.
>
> http://aubard.us/75_Triumph/20190514_091212.jpg
>
>    Before going on and on, as I am want to do, here is the engine and it's
> bay. This is before balancing the carbs and installing the refinished air
> cleaner with a new element. It now starts easily and runs great!
>
> http://aubard.us/75_Triumph/20190515_120747.jpg
>
>    I've left out the bit about omitting a waterpump bolt and causing a
> leak. And probably other little issues like a new alternator, but you get
> the gist.
>
> Rick
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