Quote:
Originally Posted by Half-Inch Stud
If the jackets are not rusted, then .099 in a zone ought to play well. Hard block is your friend.
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How many blocks have you ever seen WITHOUT rust in the water jackets? I’ve seen thousands of gas and diesel blocks. I can count the ones that didn’t have rust in the water jackets on the fingers of one hand. The ONLY way to ensure there’s no rust inside the water jackets is to run the block through a cleaner like Kolene, which burns the rust out. As good as shot blasting cabinets are today, they can’t clean the entire water jacket. .099 before boring is going to be well south of .099 after boring.