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Old 03-13-2020, 12:42 PM   #3
100IH
Senior Member
 
Join Date: Dec 2011
Location: SW Idaho
Posts: 970
Default Re: Head stud holes into block water jacket?

Through holes are known as wet holes and i agree that they must be coated with a sealer and Permatex #2 is the preferred stuff. So map them out and seal them so they won't seep coolant up through the head.
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