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Dick Deegan · 01-20-2014, 08:54 AM

I think that you will need to remove the head and do one of two things. Use an oversize stud (where the threads going into the block are oversize) or use a heli coil. I had the same thing happen to me with #2 stud and removed the head (which is not that difficult) drilled and tapped the hole in the block (1/2 X 13 I think) placed the new stud and that was that. Be very careful to ensure that the newly tapped hole is absolutely perpendicular to the block. If you don't the head will not go on properly. Ask me how I know!!

If you had this happen to #8 stud, it definitely needs to be repaired. If you are going to have one stud leak it will be #8. IMO it is the most vulnerable place in the Model A head/block for leakage of coolant.

Good luck

Dick

01-20-2014, 08:54 AM	#4
Dick Deegan Senior Member Join Date: May 2010 Posts: 527	Re: Torquing head nut then it happened I think that you will need to remove the head and do one of two things. Use an oversize stud (where the threads going into the block are oversize) or use a heli coil. I had the same thing happen to me with #2 stud and removed the head (which is not that difficult) drilled and tapped the hole in the block (1/2 X 13 I think) placed the new stud and that was that. Be very careful to ensure that the newly tapped hole is absolutely perpendicular to the block. If you don't the head will not go on properly. Ask me how I know!! If you had this happen to #8 stud, it definitely needs to be repaired. If you are going to have one stud leak it will be #8. IMO it is the most vulnerable place in the Model A head/block for leakage of coolant. Good luck Dick