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techtalk:ref:engmech05 [2019/10/12 03:56] hippysmack |
techtalk:ref:engmech05 [2020/03/01 23:29] hippysmack [Filter on End of the Vent Line] |
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The filter adds resistance to the vent pressure coming out of the engine. \\ | The filter adds resistance to the vent pressure coming out of the engine. \\ | ||
This resistance can add to goop in the line / filter later. \\ | This resistance can add to goop in the line / filter later. \\ | ||
+ | It can also increase the vacuum inside the engine, which on a street bike, translates to weeping gaskets. \\ | ||
The filter does not keep debris from coming back into the engine. ((Folkie of the XLFORUM http://xlforum.net/forums/showthread.php?p=2087347)) \\ | The filter does not keep debris from coming back into the engine. ((Folkie of the XLFORUM http://xlforum.net/forums/showthread.php?p=2087347)) \\ | ||
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If your breather valves are in good order, nothing can get back through them. \\ | If your breather valves are in good order, nothing can get back through them. \\ | ||
- | The exception to this would be 91-03 engines with the middle rocker box umbrella valve with the tiny hole behind it. \\ | + | The exception to this would be small oil drainback hole that keeps oil from building up between the umbrella and the outlet. \\ |
The tiny holes next to (and slightly lower than) the umbrella valves are for draining the separated oil back into the rocker box. \\ | The tiny holes next to (and slightly lower than) the umbrella valves are for draining the separated oil back into the rocker box. \\ | ||
However, there isn't large enough suction back on the vent line to pull debris up and into the engine. \\ | However, there isn't large enough suction back on the vent line to pull debris up and into the engine. \\ |