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Re: OK to Over-torque Head Nuts?
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Posted by txgrn on July 05, 2005 at 19:02:49 from (209.151.116.172):
In Reply to: OK to Over-torque Head Nuts? posted by Russ (NM) on July 05, 2005 at 17:37:49:
My experience of half century is this. I use Kopper Koat on all head gaskets. It's made for that. The spray is very convenient. Don't remember the last time I had one leak or blow after installation. Torque consistency is more important than specific torque although you need to be around the area of design. I use an impact wrench for torqueing heads but we won't go into that again. If you over torque the bolt, you stand a chance of breaking it which is a very big no-no. Suggest you get a torque spec for the grade and size head bolt before you over torque and remember the specified value is for a clean, dry interface of the threads. Dirty threads or oiled up slick threads put different stresses on the bolts for the indicated torque. HTH. Mark
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