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techtalk:ref:engmech04k [2020/10/06 15:29] hippysmack [Breather Valves (1957-Up)] |
techtalk:ref:engmech04k [2020/10/09 02:24] hippysmack [Breather Valves (1957-Up)] |
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| **1977-78 models only**: ((Hopper of the XLFORUM http://xlforum.net/forums/showthread.php?t=518948&highlight=cam+chest+breather)) \\ | **1977-78 models only**: ((Hopper of the XLFORUM http://xlforum.net/forums/showthread.php?t=518948&highlight=cam+chest+breather)) \\ | ||
| The timed breather on the oil pump drive was dropped. \\ | The timed breather on the oil pump drive was dropped. \\ | ||
| - | Without the breather gear that means you less control of the oil / air density in the crankcase. \\ | + | Without the breather gear that means you have less control of the oil / air density in the crankcase. \\ |
| An external non-return valve was plumbed into the breather vent tube sticking down from the timing cover at the generator drive. \\ | An external non-return valve was plumbed into the breather vent tube sticking down from the timing cover at the generator drive. \\ | ||
| This allows air out, but not in. It is sometimes referred to as the foo-foo valve. \\ | This allows air out, but not in. It is sometimes referred to as the foo-foo valve. \\ | ||
