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correct tap size for b20b head bolts?

Discussion in 'Trucks and SUV's' started by kaardis, Apr 3, 2012.

  1. kaardis

    kaardis New Member

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    anybody know offhand what the thread size is for head bolts on a b20b block? i need to clean up the threads on one of the holes just need to verify the size...
     
  2. kaardis

    kaardis New Member

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    the guys at ARP got back to me. original thread size is 11mm x 1.5 pitch
     
  3. kaardis

    kaardis New Member

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    Heres the tap i got. In order to get down to the head bolt threads, i needed a long shaft tap or an extension, I got this off ebay from L & N enterprises. Awesome tap definitly worth paying for imho.
     

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