Boring a 3a

[d_x20 at hotmail.com (Bryan Rankin)]

Got my block measured by my cousin (a machinist) using an inside micrometer 
today.  The measurements seemed ok, but upon further inspection we saw that 
cylinder number 4 was pitting.

http://memimage.cardomain.net/member_img_a/566365_41_full.jpg

Then, what we thought was the carbon ring, was actually the real diameter of 
the cylinder wall...

http://memimage.cardomain.net/member_img_a/566365_42_full.jpg

Is it safe to bore the 3a out with it having thin cylinder walls?   If it 
is, what is the most I can bore it out to?

Thanks

Bryan
Fort McMurray, AB
81 Volkswagen Scirocco

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