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Are these engine bore's any good? 

 

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 Post subject: Are these engine bore's any good?
Posted: Fri Nov 04, 2011 5:23 pm 
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Hey fellas i pulled the AU engine out and it has asticker on the back of the block.
Anyone got any info on what the bore letters represent. some sort of diameter i suppose, does it mean much

 

 

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 Post subject: Re: Are these engine bore's any good?
Posted: Fri Nov 04, 2011 5:26 pm 
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The letters are the tollerance for each bore, not allowed to be more than 1 letter difference is my understanding, ie A and B is find B and C is fin but A and C is not..

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 Post subject: Re: Are these engine bore's any good?
Posted: Fri Nov 04, 2011 5:39 pm 
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Thanks dc. Makes you wonder why they put a sticker on though. youd reckon the motor would either pass so put it in a car or fail and go to scrap or rebore.
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 Post subject: Re: Are these engine bore's any good?
Posted: Fri Nov 04, 2011 7:50 pm 
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So they know what slugs to drop in when they build it, they match bore letters to piston letters.

 

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 Post subject: Re: Are these engine bore's any good?
Posted: Fri Nov 04, 2011 8:48 pm 
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Lots of manufacturers do this, the letter thing....even do it for cranks & conrods too.
A, B, C.....they are all within a poofteenth of each other anyway.

 

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