RCU Forums - View Single Post - How important is the break in procedure?

06-03-2011 | 08:32 AM

#120

DarZeelon

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From: Rosh-HaAyin, ISRAEL

RE: How important is the break in procedure?

Quote:

ORIGINAL: Broken Wings

Is there a problem discussing metallurgy?

The parts inside the engine are made of metal. ABC/ABN/AAC/ABL ....................

Do you not believe that metal reacts to heat?

BW,

No problem at all discussing metallurgy... Except it is not what the OP asked.

Metals do react to heat.
But not the metals that our ABC engines are constructed from; and not at the temperatures they reach inside a running glow engine.

In tapered-bore engines, it is only possible for the piston to be work-hardened slightly.
No metal transfer takes place.

In Meehanite-steel engines, other processes do take place... Minute shards of steel from the sleeve embed themselves in the cast-iron piston's surface; and make it into a hone, which eats away from the sleeve, as the iron piston grows and stabilizes in size.

But the great majority of current engines are not like that any more. It is an overwhelming minority, after nearly all current engines are either taper-bored, or ringed.

I am sure Brian Hampton (downunder) can elaborate on this issue.

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