If your dog is lip-licking during a training session, it's probably best to find a way to quickly end on a positive note (ask your dog to do something he knows and wrap up the session). Next time, break down the action or behavior into smaller segments so it's easier for your dog to learn.
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When you tighten a head bolt, the force exerted by the wrench is accomplishing two things. First, it is overcoming the friction between the threads on the fastener and the hole threads in the block and the friction of the underside of the bolt head as it turns against the cylinder head.