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techtalk:ref:engmech04 [2020/10/06 22:36] hippysmack [Symptoms of Breather problems] |
techtalk:ref:engmech04 [2020/10/07 03:40] hippysmack [Sub Documents] |
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| ====== Engine Breathing ====== | ====== Engine Breathing ====== | ||
| - | See also in the Sportsterpedia: \\ | ||
| - | * [[techtalk:ref:oil10#refoiling_lubrication|Wet Sumping]] | ||
| - | * [[techtalk:ref:oil05#engine_and_primary_oil_system_modifications|Engine and Primary Oil System Modifications]] | ||
| **The one way breather style system is more like a car PCV system**. ((mrmom9r of the XLFORUM http://xlforum.net/forums/showthread.php?t=1204854&page=4)) Unlike an auto PCV, a Sportster has a faster acting type one way valve. \\ | **The one way breather style system is more like a car PCV system**. ((mrmom9r of the XLFORUM http://xlforum.net/forums/showthread.php?t=1204854&page=4)) Unlike an auto PCV, a Sportster has a faster acting type one way valve. \\ | ||
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| ===== Sub Documents ===== | ===== Sub Documents ===== | ||
| * [[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: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]] | ||
| + | * [[techtalk:ref:oil10#refoiling_lubrication|Wet Sumping]] | ||
| * [[techtalk:ref:engmech04m|Why Oil Pukes Out the Breather]] | * [[techtalk:ref:engmech04m|Why Oil Pukes Out the Breather]] | ||
| - | ==== Symptoms of Breather problems ==== | + | ==== Symptoms of Breather Valve Problems ==== |
| **The most notable signs of breather valve problems include weeping / leaking gaskets or blown gaskets / seals**. \\ | **The most notable signs of breather valve problems include weeping / leaking gaskets or blown gaskets / seals**. \\ | ||
| - | 77-E82 breather valves can get drudged in old thickened oil and not open/close properly. \\ | ||
| L82-up rubber umbrella(s) get hard and if they don't flex well enough, they'll allow the engine to fully inhaler and exhale on every stroke uncontrolled. \\ | L82-up rubber umbrella(s) get hard and if they don't flex well enough, they'll allow the engine to fully inhaler and exhale on every stroke uncontrolled. \\ | ||
| Stopped up breather valves won't allow the engine to breath well and can create excess vacuum and implode gaskets. \\ | Stopped up breather valves won't allow the engine to breath well and can create excess vacuum and implode gaskets. \\ | ||
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| However, a slight amount of oil in mist form coming out the vent/air cleaner is totally normal and does not quantify as puking oil. \\ | However, a slight amount of oil in mist form coming out the vent/air cleaner is totally normal and does not quantify as puking oil. \\ | ||
| - | **Wetsumping can be a result of poor engine breating but not always**. \\ | + | **Wetsumping can be a result of poor engine breathing but not always**. \\ |
| Blowing oil out after extended shutdown periods is a condition of bad oil pump sealing, bad check valve or regulator (if equipped) sealing. \\ | Blowing oil out after extended shutdown periods is a condition of bad oil pump sealing, bad check valve or regulator (if equipped) sealing. \\ | ||
| Blowing oil out the vent/air cleaner during riding first looks to the oil tank being overfilled. \\ | Blowing oil out the vent/air cleaner during riding first looks to the oil tank being overfilled. \\ | ||
| If the engine is not at operating temp before checking the oil level, you'll end up adding too much oil to the system. \\ | If the engine is not at operating temp before checking the oil level, you'll end up adding too much oil to the system. \\ | ||
| Blowing oil out the vent/aircleaner during high sustained RPM may be high crankcase pressure or poor oil scavenging. \\ | Blowing oil out the vent/aircleaner during high sustained RPM may be high crankcase pressure or poor oil scavenging. \\ | ||
| - | [[techtalk:ref:oil10#wet_sumping|Click here]] to read the full article on wetsumping in the REF section of the Sportsterpedia. \\ | + | Also see the full article on wetsumping in the sub documents above. \\ |
| ====== Crankcase Pressure ====== | ====== Crankcase Pressure ====== | ||
