Hello Ned,
With 87K on it, you can make a couple of educated
decisions;
1. If it is not using much oil, and the oil pressure
is good - ie 40 plus hot, then the chances are the
motor has been rebuilt at least once.
2. If it is using a quart every 500 miles, chances
are that it has about 50K since the last rebuild.
So it sounds like this is not a case of one cylinder
going bad on a 20K mile engine. So back to my
suggestions - probably fixes 2 or 3 are appropriate.
Your compressions were pretty good, and even as I
remember - that is good. Let us know what the pre
noise engine/trans characteristics were on oil
consumption, water consumption, clutch operation,
synchro operation, and oil leaks.
Best, Robert.
--- Ned Smith <smithn00@kitepilot.net> wrote:
> This car has 87,000 miles on it. I don't know when
> it was last overhauled. I
> am asking the PO now.
> I recently got a Colortune and followed the
> instructions to get the proper
> mixture. I did that only a week before the ring
> broke. I hope that didn't
> cause the problem. Water temp never got over 195.
>
> Ned Smith
> BJ8
> near Chattanooga, TN
> N34.98 W85.5
>
> -----Original Message-----
> From: Michael Salter
> [mailto:msalter@precisionsportscar.com]
> Sent: Monday, April 17, 2006 9:18 AM
> To: 'Yellow 65BJ8'; 'Ned Smith'; 'Austin-Healey
> List'
> Subject: RE: The Head is Off
>
> Hi again Ned,
> Robert is correct; sometimes with a relatively low
> mileage engine you can
> get away with a "patch up" and, when done carefully,
> these can deliver good
> results and my message was probably over pessimistic
> in that respect.
> Three things that I would add to Robert's list of
> requirements for
> satisfactory engine life are a good cooling system,
> correct ignition timing
> and careful mixture settings. Most piston and ring
> failures (especially when
> these appear some considerable mileage after a
> rebuild) are attributable to
> problems with ignition timing or excessively lean
> mixtures. These can cause
> piston damage through prolonged detonation, or
> overheating, as of course can
> a poorly maintained cooling system.
>
>
>
>
Robert - Yellow 65BJ8
rnbmail@yahoo.com
Cell: 408-221-5244
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