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techtalk:ih:engmech07a [2019/12/05 17:30] hippysmack [Timing the Breather Valve] |
techtalk:ih:engmech07a [2019/12/06 02:03] hippysmack [Timing the Breather Valve] |
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====== Timing the Breather Valve ====== | ====== Timing the Breather Valve ====== | ||
+ | **Caution**: \\ | ||
+ | Improper breather timing causes poor oil scavenging from flywheel cavity and incorrect crankcase air pressure. ((http://nightrider.com/biketech/download/ssmanuals/sportster_stroker.pdf)) \\ | ||
+ | These conditions may cause unwarranted engine oil leaks around gaskets and seals and probable oil burning due to oil blow by past the piston rings. \\ | ||
- | Rotate the engine to get the advanced timingmark in the timing window as above. \\ | + | Rotate the engine to get the advanced timing mark in the timing window as above. \\ |
Remove the pinion shaft gear, and turn the engine so the mark on the oil pump drive on the shaft is pointing straight up. \\ | Remove the pinion shaft gear, and turn the engine so the mark on the oil pump drive on the shaft is pointing straight up. \\ | ||
+ | See the [[techtalk:ref:tools133|Pinion Gear Tools]] in the REF section of the Sportsterpedia for some helpful ideas on a gear puller / remover. \\ | ||
The pump drive gear is a slip fit over splines on the pinion shaft. \\ A mark is cut on one side of it which should face outward against the pinion gear when installed. \\ | The pump drive gear is a slip fit over splines on the pinion shaft. \\ A mark is cut on one side of it which should face outward against the pinion gear when installed. \\ | ||
Line up the timing hole on the breather sleeve gear on the oil pump to be in the notch (window) in the front. It may take a few tries to roll it into place. \\ | Line up the timing hole on the breather sleeve gear on the oil pump to be in the notch (window) in the front. It may take a few tries to roll it into place. \\ |