[TR] Rings Not seating

[Geo Hahn]

Roger -

I purchased a car that the PO had replaced the rings and they had not
seated -- and driving in the usual break-in mode did not get the job done.
In the end I did the trick wherein you dump some Bon Ami into the intake
and that resolved the problem.

The intent it not to scratch the cylinder walls with the powder (indeed Bon
Ami is quite gentle in that regard) but rather to absorb oil in the
cylinders so they run a stroke of two with oil deprivation and the rings
seat.

Probably a controversial solution - certainly well documented on the web
though, of course, that proves nothing.  But I think it worked for me and
seemed worth a shot prior to tearing things down.

Geo

On Sun, Jun 21, 2015 at 12:46 PM, Roger Elliott <elliottr at rmi.net> wrote:

> Hi,
>
> What is the most likely cause of rings not seating?
>
> I rebuilt my Spitfire engine about 4,000 miles ago and still have
> excessive oil consumption.    I don't seem to be leaking oil, so my
> assumption is that it is getting past the rings.
>
> I did check the gap on all of the rings during installation and they all
> were within tolerance - generally towards the tighter end.
>
> I am planning on taking off the head and putting new rings on.
>
> What steps should I take to try to make sure the new rings seat properly?
> I am thinking I should run a hone down cylinders just to roughen up the
> walls a bit.
>
>
> Thanks,
> Roger  Elliott
>
>
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