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Old 07-17-2008, 07:05 AM   #6
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Join Date: Apr 2007
Chapter/Region: MWSOC
Location: Rockford, Il
2006 wrx STi


He may well have bored the block using torque plates. Perhaps he just did the final honing without.

Originally Posted by fastnoypi View Post
still new to engine builds...what do torque plates do in the building process?
A torque plate is used to simulate the loads applied to the block by a torqued head during machining. When you torque a head down it slightly distorts the bore. If you bore the block perfectly round without a torque plate in place, it will go slightly out of round when you install your heads, negatively affecting ring seal. If you bore with a torque plate in place the bore being distorted will be taken into account. It should actually read slightly out of round without a torqued head/plate, but should be perfectly round when the head is actually installed.
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