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06-20-2013, 12:21 PM | #1 |
Junior Member
Join Date: Aug 2012
Location: Lexington, KY
Posts: 20
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Stripped stud in block
I have found that the middle head stud (#8 on some torque layouts) directly behind the water outlet was badly stripped after the previous owner attempted a repair with an over size stud. It would not torque.
My question, would it be worthwhile to attempt to tap the stripped hole for a larger helicoil so I can reuse the over size stud? I beleive that I can tap the hole without drilling as the stripped hole is very close to the outside dimensions of the insert. I realize that this will reduce the area between the stud hole and the water passage. A machinist friend suggested that if I did attempt this to coat the helicoil with a liberal amount of J D Weld before inserting the coil. Should I also coat the stud with J D Weld then screw it into the coil? I am very new to A's and have not done any engine work for more years than I care to think of, as far back as the flat head V8's of the late 40's.
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06-20-2013, 01:11 PM | #2 |
Senior Member
Join Date: May 2010
Location: Crete, Illinois
Posts: 296
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Re: Stripped stud in block
NO. Don't put any JB Weld on the stud itself. This is a bonding material. You would never be able to remove the stud with out much difficulty if the need arises.
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06-20-2013, 02:30 PM | #3 |
Senior Member
Join Date: May 2010
Location: Santee, California
Posts: 3,505
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Re: Stripped stud in block
Since a repair for the oversize stud has already been attempted and bungled, I would go for the helicoil. Is the stud in good shape? If so, definitely drill the appropriate size for the helicoil as recommended. I would not use the existing hole size, which is smaller than what you need for perfect threads. Approach the repair as a new repair at the larger stud size with helicoil. If the existing hole is a little off perpendicular, you will likely not be able to correct the alignment. Studs can be slightly bent to correct this if necessary, by bumping them with a dead blow hammer.
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06-20-2013, 04:07 PM | #4 |
Senior Member
Join Date: May 2010
Location: Pace, FL near Pensacola
Posts: 374
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Re: Stripped stud in block
If the hole is not too big, I would try to use a helicoil for the original size stud.
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06-20-2013, 04:19 PM | #5 |
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Join Date: May 2010
Location: Gothenburg Nebraska Just off I-80
Posts: 4,893
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Re: Stripped stud in block
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