[Healeys] Break in procedure

[Richard Ewald]

I would just like to point out that the largest engine builders* in the
world have never done any of these things.
While useful for a race engine, are such extreme measured really necessary
for a street engine?
::: shrug:::
Rick



*GM, Ford, Toyota etc.

On Fri, Jun 29, 2012 at 12:58 PM, <editorgary at aol.com> wrote:

> For break-in of a new engine, three key tips from my race car mechanic --
> molybdenum assembly grease on all rubbing surfaces, Torco break-in oil (I'm
> convinced from data, tests, and specs, it's the best stuff on the market
> for
> those key few minutes of initial operation, and run it over various loads
> during the first 20 minutes, before changing the oil and filter and
> retorquing
> the head. On the first point, the moly in the grease mixes with the
> phosphate
> in the break-in oil to form a metal that fills in the microdepressions in
> the
> rubbing surfaces, while the lubrication from the oil allows the rubbing
> surfaces to smoothly grind down the microscopic high points in the metal.
> On
> the second point, all those micrometallic particles have to go somewhere,
> and
> that's into the oil and into the filter, which is why both need to be
> changed
> after the first 20 minutes of run-in. On the third point, if you can
> arrange
> for time on a chassis dyno, that's the best situation (allows for varying
> loads while you can easily reach the engine to tweak carburetion, check
> timing, and visually make sure everything looks right). Alternatively,
> after
> the car has run for 5-10 minutes after start-up, at least run it up and
> down
> the street (a hill is even better).
>
> Gary
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