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techtalk:ref:engmech01a [2018/08/31 11:04] hippysmack [Timing Inspection Hole and Plug - Sealing and Thread Repair] |
techtalk:ref:engmech01a [2019/01/09 04:15] ixl2relax ↷ Links adapted because of a move operation |
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| * Try [[techtalk:ref:engmech01a#cutting_new_threads_for_an_oversized_plug|Cutting new threads for an oversized plug]]. | * Try [[techtalk:ref:engmech01a#cutting_new_threads_for_an_oversized_plug|Cutting new threads for an oversized plug]]. | ||
| ===== Chasing the Existing Threads ===== | ===== Chasing the Existing Threads ===== | ||
| - | See also the [[techtalk:ref:notes104|warped or damaged thread repair]] section of the Sportsterpedia. | + | See also the [[techtalk:ref:genmsr36|warped or damaged thread repair]] section of the Sportsterpedia. |
| * A tap and a die is normally used to chase the threads in the case and on the plug respectively back to their original shape / cleanliness and usually done with plenty of good cutting oil. \\ However, for this application, fluidity can be detriment to the cause. With the small amount of threads on the plug and the imminent danger of getting cut shavings (swarf) into the engine case thru the timing hole, it is best to use thick lube or even axle grease to lube the tap to chase the case threads. \\ While chasing the threads, your following the existing 'centered' thread pattern. ((Hippysmack http://xlforum.net/forums/showthread.php?t=2068069&page=3)) \\ You only have to run the tap in far enough to clear the length of the plug, not to the end of the case threads. \\ | * A tap and a die is normally used to chase the threads in the case and on the plug respectively back to their original shape / cleanliness and usually done with plenty of good cutting oil. \\ However, for this application, fluidity can be detriment to the cause. With the small amount of threads on the plug and the imminent danger of getting cut shavings (swarf) into the engine case thru the timing hole, it is best to use thick lube or even axle grease to lube the tap to chase the case threads. \\ While chasing the threads, your following the existing 'centered' thread pattern. ((Hippysmack http://xlforum.net/forums/showthread.php?t=2068069&page=3)) \\ You only have to run the tap in far enough to clear the length of the plug, not to the end of the case threads. \\ | ||
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| |**5/8"x18 NF 'bottoming' hand tap** for the case threads \\ (which is flat on the end with a short a taper)|**5/8"x18 NF die** for the plug| | |**5/8"x18 NF 'bottoming' hand tap** for the case threads \\ (which is flat on the end with a short a taper)|**5/8"x18 NF die** for the plug| | ||
| - | |{{:techtalk:ref:notes:5-8x18_bottoming_tap_by_hippysmack.jpg?direct&400|}}|{{:techtalk:ref:notes:5-8x18_die_by_hippysmack.jpg?direct&400|}}| | + | |{{techtalk:ref:svcproc:5-8x18_bottoming_tap_by_hippysmack.jpg?direct&400|}}|{{techtalk:ref:svcproc:5-8x18_die_by_hippysmack.jpg?direct&400|}}| |
| * **Choosing the right tap** | * **Choosing the right tap** | ||
