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scott12180

1942 305 cu in Zephyr

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Just a general question on the 305 cubic inch Zephyr engine for 1942.  I've heard that by boring out the block to be a 305, these engines are prone to cracking.  That's one reason why after the War they went back to the 292, I understand.

 

If one were to find a running 1942 Zephyr which has been been rebuilt, would you have a risk that the block may crack under normal use? 

 

For instance, I once owned a 1938 Packard Super 8, and learned that these blocks are prone to cracking.  If you're engine isn't cracked now, it probably will be soon if you drive it much. 

 

 -- Luke

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My 292 is bored .060 over 2 7/8". That's only .0025 from 2 15/16".  I have no heating issues. 

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