Art:-
Most new cars do have a break-in period today (or "run-in" in Britspeak),
but the limits are not as onerous and are more for bedding in the brakes
and other parts rather than the engine. The two new cars I have bought
over the last ten years both suggested avoiding panic stops and not
exceeding speeds of 60 mph and for the first 1,000 miles.
My understanding is that the manufacturers go through a break-in process
for the engine in the factory, before the engine is installed in the car.
I'm not sure how this is done, but I have seen assembly line films that
show a worker spinning an engine on an electric motor. I'm sure modern
materials have something to do with this as well.
In any case, don't think you shouldn't go through a break-in process on a
rebuild because your new Toyota doesn't need one. The motors in our MGs
are comparatively ancient in technology and should be dealt with
accordingly.
David Littlefield
Houston, TX
On Mon, 6 Oct 1997 10:32:22 -0400 (EDT) Art Pfenninger
<ch155@FreeNet.Buffalo.EDU> writes:
> Question of the day...After an engine rebuild why do we
>practice
>the ancient ritual of the dreaded BREAK IN PEROID? It used to be that
>when
>you bought a new car and drove it off the showroom floor you had to
>break
>it in. Today you pick up the car and off you go 60 miles an hour. Do
>any
>of the manufactures still require a break in peroid?
> I know what the books say about this (they actually don't say
>much
>if you really read them) some even give a schedule to follow after a
>rebuild. I suspect however that this information is being carried over
>from when this was required by the industry. Unless the companies that
>produce the replacement parts have a stock of old metal that they melt
>down
>I can't see any difference between a rebuilt engine and a new one.
>Parts
>is parts. Now if the new car companies still require a break in peroid
>then thats another story.
>...Art
>
>
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