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techtalk:ref:engmech04 [2019/08/18 04:41] hippysmack [Why Oil Pukes Out the Air Cleaner] |
techtalk:ref:engmech04 [2019/10/11 19:45] hippysmack [Vacuum Pressure] |
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| {{:techtalk:ref:engmech:86-90_sportster_positive_crankcase_pressure_by_hippysmack.jpg?direct&300|}} ((drawing by Hippysmack)) {{:techtalk:ref:engmech:86-90_sportster_negative_crankcase_pressure_by_hippysmack.jpg?direct&300|}} ((drawing by Hippysmack)) | {{:techtalk:ref:engmech:86-90_sportster_positive_crankcase_pressure_by_hippysmack.jpg?direct&300|}} ((drawing by Hippysmack)) {{:techtalk:ref:engmech:86-90_sportster_negative_crankcase_pressure_by_hippysmack.jpg?direct&300|}} ((drawing by Hippysmack)) | ||
| - | 91-03 models with head breather vents: \\ | + | 91-97 models with head breather vents: \\ |
| - | {{:techtalk:ref:engmech:91-03_sportster_positive_crankcase_pressure_by_hippysmack.jpg?direct&300|}} ((drawing by Hippysmack)) {{:techtalk:ref:engmech:91-03_sportster_negative_crankcase_pressure_by_hippysmack.jpg?direct&300|}} ((drawing by Hippysmack)) | + | |
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| + | 98-03 models with head breather vents: \\ | ||
| 04 and Up models with head breather vents: \\ | 04 and Up models with head breather vents: \\ | ||
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| |{{:techtalk:ref:engmech:86-90_sportster_engine_breathing_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:engmech:91_sportster_engine_breathing_by_hippysmack.jpg?direct&300|}}| | |{{:techtalk:ref:engmech:86-90_sportster_engine_breathing_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:engmech:91_sportster_engine_breathing_by_hippysmack.jpg?direct&300|}}| | ||
| - | | 92-03 engine breathing paths. ((drawing by Hippysmack)) | 04 and Up engine breathing paths. ((drawing by Hippysmack)) | | + | | 92-97 engine breathing paths. ((drawing by Hippysmack)) | 98-03 engine breathing paths. ((drawing by Hippysmack)) | 04 and up engine breathing paths. ((drawing by Hippysmack)) | |
| - | |{{:techtalk:ref:engmech:92-03_sportster_engine_breathing_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:engmech:04_and_up_sportster_engine_breathing_by_hippysmack.jpg?direct&300|}}| | + | |{{:techtalk:ref:oil:92-97_sportster_engine_breathing_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:oil:98-03_sportster_engine_breathing_by_hippysmack.jpg?direct&300|}}|{{:techtalk:ref:oil:04_and_up_sportster_engine_breathing_by_hippysmack.jpg?direct&300|}}| |
| | Testing CC pressure on the dyno. ((photo by Jörgen http://xlforum.net/forums/showthread.php?t=75740&page=9)) | | | Testing CC pressure on the dyno. ((photo by Jörgen http://xlforum.net/forums/showthread.php?t=75740&page=9)) | | ||
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| ===== Breather Catch Can Test For Oil Leaks Out the Vent ===== | ===== Breather Catch Can Test For Oil Leaks Out the Vent ===== | ||
| - | A test was done by XLFORUM member cjburr. Test apparatus and results are below. \\ | + | A test was done by XLFORUM member cjburr. Test apparatus and results are below. ((cjburr of the XLFORUM http://xlforum.net/forums/showthread.php?t=53769&highlight=valve+guide&page=13)) \\ |
| This testing was done to help diagnose an oil leak that couldn't be seen or otherwise detected. \\ | This testing was done to help diagnose an oil leak that couldn't be seen or otherwise detected. \\ | ||
| - | However, this is a good exercise if you are concerned about how much oil you may be losing from the crankcase puking. \\ | + | However, this may be a good exercise if you are concerned about how much oil you may be losing from the crankcase puking. \\ |
| + | It should show what, how much and when oil accumulates in the hose / catch can. \\ | ||
| + | The length / size of tubing will change crankcase pressure to an extent so the results may not reflect exactly what's going on inside your engine. \\ | ||
| The vent to air cleaner was inspected and then removed for testing. The factory system routes the breathers to the front of the carb. \\ | The vent to air cleaner was inspected and then removed for testing. The factory system routes the breathers to the front of the carb. \\ | ||
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| Oil was introduced into the head with a with a turkey baster. \\ | Oil was introduced into the head with a with a turkey baster. \\ | ||
| (which is probably a higher volume of oil than it normally sees from the splash oiling) \\ | (which is probably a higher volume of oil than it normally sees from the splash oiling) \\ | ||
| + | However, if the drains were plugged, oil would overfill to the point of spewing oil at the seams and submerge the seals. ((cjburr of the XLFORUM http://xlforum.net/forums/showthread.php?t=53769&highlight=valve+guide&page=33)) \\ | ||
| | Head ready for testing. ((photo by cjburr of the XLFORUM http://xlforum.net/forums/showthread.php?t=53769&highlight=valve+guide&page=31)) | Oil poured in and draining. ((photo by cjburr of the XLFORUM http://xlforum.net/forums/showthread.php?t=53769&highlight=valve+guide&page=31)) |Oil level at the intake valve when it starts to drain to \\ the exhaust side. ((photo by cjburr of the XLFORUM http://xlforum.net/forums/showthread.php?t=53769&highlight=valve+guide&page=31)) | | | Head ready for testing. ((photo by cjburr of the XLFORUM http://xlforum.net/forums/showthread.php?t=53769&highlight=valve+guide&page=31)) | Oil poured in and draining. ((photo by cjburr of the XLFORUM http://xlforum.net/forums/showthread.php?t=53769&highlight=valve+guide&page=31)) |Oil level at the intake valve when it starts to drain to \\ the exhaust side. ((photo by cjburr of the XLFORUM http://xlforum.net/forums/showthread.php?t=53769&highlight=valve+guide&page=31)) | | ||
