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techtalk:evo:engmech07 [2019/08/18 02:43] hippysmack [2004-Present Engine Breathing] |
techtalk:evo:engmech07 [2020/02/10 17:03] hippysmack [Sub Documents] |
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Also there is a bump to take up extra space next to the umbrella housing and it fits nicely in the hole of the gasket. \\ | Also there is a bump to take up extra space next to the umbrella housing and it fits nicely in the hole of the gasket. \\ | ||
- | {{:techtalk:evo:engmech:oem_gasket_1_by_dieselvette.jpg?direct&300|}} ((photo by dieselvette of the XLFORUM http://xlforum.net/forums/showthread.php?p=5769573#post5769573)) {{:techtalk:evo:engmech:oem_gasket_1_by_dieselvette.jpg?direct&300|}} ((photo by dieselvette of the XLFORUM http://xlforum.net/forums/showthread.php?p=5769573#post5769573)) | + | {{:techtalk:evo:engmech:oem_gasket_1_by_dieselvette.jpg?direct&300|}} ((photo by dieselvette of the XLFORUM http://xlforum.net/forums/showthread.php?p=5769573#post5769573)) {{:techtalk:evo:engmech:oem_gasket_2_by_dieselvette.jpg?direct&300|}} ((photo by dieselvette of the XLFORUM http://xlforum.net/forums/showthread.php?p=5769573#post5769573)) |
**Using Cometic Rocker Box Gaskets**: \\ | **Using Cometic Rocker Box Gaskets**: \\ | ||
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====== Head Breather Bolts ====== | ====== Head Breather Bolts ====== | ||
+ | ===== Sub Documents ===== | ||
+ | * [[techtalk:evo:engmech07a|Making 91-03 Breather Bolt Holes Smaller]] | ||
+ | |||
See also [[techtalk:ref:engmech04|Evo Crankcase Pressure and Engine Breathing]] in the REF section of the Sportsterpedia. \\ | See also [[techtalk:ref:engmech04|Evo Crankcase Pressure and Engine Breathing]] in the REF section of the Sportsterpedia. \\ | ||
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{{:techtalk:evo:engmech:stainless-steel-breather-bolts-1_by_folkie.jpg?direct&300|}} {{:techtalk:evo:engmech:stainless-steel-breather-bolts-2_by_folkie.jpg?direct&300|}} | {{:techtalk:evo:engmech:stainless-steel-breather-bolts-1_by_folkie.jpg?direct&300|}} {{:techtalk:evo:engmech:stainless-steel-breather-bolts-2_by_folkie.jpg?direct&300|}} | ||
+ | ====== Symptoms of Breather problems ====== | ||
+ | Read more here on the [[techtalk:ref:engmech04#engine_breathing|Engine Breathing System]] in the REF section of the Sportsterpedia. \\ | ||
+ | The most noticeable signs of breather valve problems are weeping gaskets or oil excessively leaking out the breather or puking oil out of it. \\ | ||
+ | When the umbrella(s) gets hard, it doesn't flex well to allow the engine to breath out on exhale. \\ | ||
+ | Then the trapped in air is compounded on the next stroke. The excess air contributes to more vacuum created and implodes the gaskets. \\ | ||
+ | Or it contributes to too high of oil density and slings excess oil out. \\ | ||
+ | Other factors are involved so results will vary. \\ | ||
\\ | \\ |