The only problem is that if you pick up an engine rebuilding book
for say a chevy it will also tell you to break it in. I was at the
library
today trying to answer my own question and one book ended the paragraph on
break in with "trust me the engine will last a lot longer". Ok where is
the data. Everyone seems to agree but only because it seems like the right
thing to do. Ask around at work on how many break their new cars in. I
think the previous writer may have a point when he said it is done in the
factory, but how?
...Art
On Mon, 6 Oct 1997, ROBERT G. HOWARD wrote:
> Art,
> Could it be that the new car manufacturers recognise that today's
> production tolerances are so small that break-in is no longer required?
> After all, they recommend 5-30 oil, pretty thin stuff at the 5 end of the
> viscosity spectrum.
> Our MGs are loose by modern standards, one would think. How do the specs
> for piston and cylinder size for rebuilds compare with the specs for new,
> modern engines?
> Once upon a time (TD & TF time) the workshop manual spoke of the
> different sized (that's right--different sizes!) of pistons that could be
> used in a given engine because of the different bore sizes. Balance?
> What's that word?
> Just my assumptions---no basis in engineering knowledge at all.
> Bob
> English major, long time ago.
> Took a math course, once.
>
> 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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