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techtalk:ref:engmech04 [2020/10/07 03:56] hippysmack [1986-1990 Engine Specifics] |
techtalk:ref:engmech04 [2020/10/08 16:59] hippysmack [Sub Documents] |
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| After the oil has been removed from that small (separation) chamber, a small amount of atmosphere is pulled into the engine thru the tiny hole. \\ | After the oil has been removed from that small (separation) chamber, a small amount of atmosphere is pulled into the engine thru the tiny hole. \\ | ||
| At that point, the tiny hole is a slight air (atmosphere) intake hole. \\ | At that point, the tiny hole is a slight air (atmosphere) intake hole. \\ | ||
| + | |||
| + | The crankcase air pushes past the breather valve and exits the engine out the breather vent (which is factory plumbed into the air cleaner backing plate). \\ | ||
| {{:techtalk:evo:engmech:86-90_cc_pressure_drawing_by_hippysmack.jpg?direct&300|}} ((drawing by Hippysmack)) {{:techtalk:evo:engmech:86-90_engine_crankcase_breathing_by_hippysmack.jpg?direct&300|}} ((drawing by Hippysmack)) | {{:techtalk:evo:engmech:86-90_cc_pressure_drawing_by_hippysmack.jpg?direct&300|}} ((drawing by Hippysmack)) {{:techtalk:evo:engmech:86-90_engine_crankcase_breathing_by_hippysmack.jpg?direct&300|}} ((drawing by Hippysmack)) | ||
| Line 72: | Line 74: | ||
| At that point, the tiny hole is a slight air (atmosphere) intake hole. \\ | At that point, the tiny hole is a slight air (atmosphere) intake hole. \\ | ||
| - | The crankcase air pushes past each breather valve and exits the engine out the breather vent (which is factory plumbed into the air cleaner backing plate). \\ | + | The crankcase air pushes past each breather valve and exits through the heads. \\ |
| + | A hole in each head connects the path from the outlet of the breather vent to atmosphere. \\ | ||
| + | A hollow bolt installed into each head passes the air into the air cleaner backing plate. \\ | ||
| + | |||
| + | {{:techtalk:evo:engmech:91_and_up_cc_pressure_drawing_by_hippysmack.jpg?direct&300|}} ((drawing by Hippysmack)) {{:techtalk:evo:engmech:91-up_engine_crankcase_breathing_by_hippysmack.jpg?direct&300|}} ((drawing by Hippysmack)) | ||
| ==== 2004-Up Engine Specifics ==== | ==== 2004-Up Engine Specifics ==== | ||
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| A hole in each head connects the path from the outlet of the breather vent to atmosphere. \\ | A hole in each head connects the path from the outlet of the breather vent to atmosphere. \\ | ||
| A hollow bolt installed into each head passes the air into the air cleaner backing plate. \\ | A hollow bolt installed into each head passes the air into the air cleaner backing plate. \\ | ||
| - | | + | |
| + | {{:techtalk:evo:engmech:91_and_up_cc_pressure_drawing_by_hippysmack.jpg?direct&300|}} ((drawing by Hippysmack)) {{:techtalk:evo:engmech:91-up_engine_crankcase_breathing_by_hippysmack.jpg?direct&300|}} ((drawing by Hippysmack)) | ||
| ==== OEM oil paths and engine breathing drawings ==== | ==== OEM oil paths and engine breathing drawings ==== | ||
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| * [[techtalk:ref:engmech04k|Breather Valves (1957-Up)]] (list of breather valve changes) | * [[techtalk:ref:engmech04k|Breather Valves (1957-Up)]] (list of breather valve changes) | ||
| * [[techtalk:ref:engmech04j|Further Study of Evo Sportster Breather Valves]] | * [[techtalk:ref:engmech04j|Further Study of Evo Sportster Breather Valves]] | ||
| + | * [[techtalk:ref:engmech07h|Oil Drainback and Supplemental Air Intake from Breather Valves]] | ||
| * [[techtalk:ref:engmech05|Breather Venting / Relocation]] (list of breathing mods and aftermarket breathers) | * [[techtalk:ref:engmech05|Breather Venting / Relocation]] (list of breathing mods and aftermarket breathers) | ||
| * [[techtalk:ref:engmech04l|Head Vents vs Cam Chest Vent]] | * [[techtalk:ref:engmech04l|Head Vents vs Cam Chest Vent]] | ||
