Fastener tech
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*When threading a blind hole, the best way to clean out the chips is to use a ball inflater needle in a blow gun. You can make an adapter using a 1/8-NPT fitting (which is a close thread to a blow gun nozzle) to adapt the inflater to it. | *When threading a blind hole, the best way to clean out the chips is to use a ball inflater needle in a blow gun. You can make an adapter using a 1/8-NPT fitting (which is a close thread to a blow gun nozzle) to adapt the inflater to it. | ||
*To keep chips from falling into an engine when rethreading a spark plug hole, put axle/bearing grease on the tap. This will collect most if not all the metal chips from falling into the engine. | *To keep chips from falling into an engine when rethreading a spark plug hole, put axle/bearing grease on the tap. This will collect most if not all the metal chips from falling into the engine. | ||
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| + | ==Torquing fasteners== | ||
| + | ;To properly torque a bolt/nut the following must be done<nowiki>:</nowiki> | ||
*Make sure all threads are clean and is the right fastener for the part. Right thread pitch, length and diameter. | *Make sure all threads are clean and is the right fastener for the part. Right thread pitch, length and diameter. | ||
*Lubricate the threads with a suitable lubricant, if necessary. | *Lubricate the threads with a suitable lubricant, if necessary. | ||
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*Bolts of different sizes are torqued differently. Smaller diameter bolts are generally torqued in one step. Larger bolts are generally torqued in at least three stages. 1/3 of the torque spec, 2/3 of the torque, then full torque. For example, if cylinder head bolts are supposed to be torqued to 90 foot-lbs, then they would be torqued first to 30, then to 60, and finally to 90 ft/lb. | *Bolts of different sizes are torqued differently. Smaller diameter bolts are generally torqued in one step. Larger bolts are generally torqued in at least three stages. 1/3 of the torque spec, 2/3 of the torque, then full torque. For example, if cylinder head bolts are supposed to be torqued to 90 foot-lbs, then they would be torqued first to 30, then to 60, and finally to 90 ft/lb. | ||
*Should you want or need to re-torque a fastener, you must first loosen it, then completely torque it. | *Should you want or need to re-torque a fastener, you must first loosen it, then completely torque it. | ||
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| + | ;More on torquing fasteners at '''[[Fastener torque]]'''. | ||
===Tap drill size charts=== | ===Tap drill size charts=== | ||
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