>I find two things wrong with this procedure. First, I do not think that
the
>scrapeing job was done very well. It looks terrible, (worst than the
>200,000 miles plus bearings that were in the engine originally) with scrape
>marks that go completly across the bearing surface. This can't be good for
>oil containment.
I'm not sure about car engines but hand-scraped bearings were the norm many
years ago in steam engines. A hand-scraped bearing actually holds oil
better and will outlast many a machined bearing. It is not unknown for
hand-scraped bearings to still look new after 60 years of running 24 hours a
day.
The scraping creates very shallow depressions which hold oil. But usually
scraping for accuracy requires a surface plate and engineer's blue rubbed on
to be able to see the high spots.
Ron
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