Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
|
techtalk:ih:engmech07 [2019/07/01 16:36] hippysmack [77> Breather Valve (or Foo Foo Valve)] |
techtalk:ih:engmech07 [2019/07/11 03:58] hippysmack [77> Breather Valve (or Foo Foo Valve)] |
||
|---|---|---|---|
| Line 146: | Line 146: | ||
| * **1979-E1982**. | * **1979-E1982**. | ||
| * The external foo-foo valve and the six-inch metal vent tube at the front of the timing cover were done away with. Instead, a one-way foo-foo valve was built inside the timing cover. A rubber breather hose then ran from the generator drive area of the timing cover, at the 9 o’clock position. It connected to the stock air filter so that any oil mist was fed back through the engine, making the EPA pollutocrats more happier than they were with the idea of engine oil spraying out into the atmosphere. The generator had a (1-5/8" O.D.) oil separator washer on the end of the armature shaft. ((HD Service Bulletin #M-848 dated April 9, 1982)) | * The external foo-foo valve and the six-inch metal vent tube at the front of the timing cover were done away with. Instead, a one-way foo-foo valve was built inside the timing cover. A rubber breather hose then ran from the generator drive area of the timing cover, at the 9 o’clock position. It connected to the stock air filter so that any oil mist was fed back through the engine, making the EPA pollutocrats more happier than they were with the idea of engine oil spraying out into the atmosphere. The generator had a (1-5/8" O.D.) oil separator washer on the end of the armature shaft. ((HD Service Bulletin #M-848 dated April 9, 1982)) | ||
| + | |||
| + | Here is a pic of IronMick's internal foo-foo in his post-79 model on the left. \\ | ||
| + | You can see the 9 oclock fitting and the 6 oclock fitting both enter the same cavity. \\ | ||
| + | {{techtalk:ih:oil:ihcamcoverxlf.jpg?direct&250|}} ((photo by ryder rick of the XLFORUM http://xlforum.net/forums/showthread.php?t=518948&page=2)) \\ | ||
| + | |||
| + | Here's the reed valve and the back side. \\ | ||
| + | {{:techtalk:ih:engmech:79_breather_valve_by_tobybott.jpg?direct&350|}} ((photo by tobybott of the XLFORUM http://xlforum.net/forums/showthread.php?p=982127&highlight=breather#post982127)) {{:techtalk:ih:engmech:reed_valve_by_lodkolv.jpg?direct&300|}} ((photo by lodkolv of the XLFORUM http://xlforum.net/forums/showthread.php?t=113861&highlight=breather&page=2)) \\ | ||
| * **L1982-1985** | * **L1982-1985** | ||
| Line 153: | Line 160: | ||
| That is fine too, as long as you are not an EPA man. \\ | That is fine too, as long as you are not an EPA man. \\ | ||
| - | Just to add to the knowledge base, here is a pic of IronMick's internal foo-foo in his post-79 model on the left. \\ | + | The pic on the left shows the breather line coming out at the 10 o'clock position going up to the air cleaner. \\ |
| - | You can see the 9 oclock fitting and the 6 oclock fitting both enter the same cavity. \\ | + | |
| The pic on the right is of an 85 cam cover with the foofoo valve (baffle tube) off to the left of it. \\ | The pic on the right is of an 85 cam cover with the foofoo valve (baffle tube) off to the left of it. \\ | ||
| - | {{:techtalk:ih:engmech:85_foofoo_2_by_spamer80.jpg?direct&300|}} ((photo by spammer80 of the XLFORUM)) {{techtalk:ih:oil:ihcamcoverxlf.jpg?direct&250|}} ((photo by ryder rick of the XLFORUM http://xlforum.net/forums/showthread.php?t=518948&page=2)) {{:techtalk:ih:oil:85_cam_cover_1_by_billeuze.jpg?direct&300|}} ((photo by billeuze of the XLFORUM http://xlforum.net/forums/showthread.php?t=1103082)) | + | {{:techtalk:ih:engmech:85_foofoo_2_by_spamer80.jpg?direct&300|}} ((photo by spammer80 of the XLFORUM)) {{:techtalk:ih:oil:85_cam_cover_1_by_billeuze.jpg?direct&300|}} ((photo by billeuze of the XLFORUM http://xlforum.net/forums/showthread.php?t=1103082)) |
| + | |||
| + | Both the 10 o'clock and 6 o'clock outlets come out of the same chamber that's controlled by the internal one-way crankcase valve. ((83XLX of the XLFORUM http://xlforum.net/forums/showthread.php?t=518948&highlight=cam+chest+breather&page=10)) \\ | ||
| + | When both are opened, the crankcase pressure can evacuate more quickly / completely. \\ | ||
| + | Opening the 6 o'clock hole doesn't bypass the factory crankcase venting arrangement. \\ | ||
| + | A small amount of oil occasionally drips from it. \\ | ||
| + | But that's better than having it accumulate in the air filter and blowing all over the right side of the bike. \\ | ||
| + | Plus, the extra vent seems to let the motor wind up a little more freely. \\ | ||
| + | No filter is needed when plumbing to the 6 o'clock breather line. ((trappnman of the XLFORUM http://xlforum.net/forums/showthread.php?t=518948&highlight=cam+chest+breather&page=12)) \\ | ||
| + | They just collect oil and drip. \\ | ||
| + | You can use an old inline glass gas filter (remove the filter itself), hooked the vent hose to it, and zip-tie it under the frame. \\ | ||
| + | It'll be horizontal to the bike and will collect the oil so it won't drip all over . \\ | ||
| + | And it'll vent freely with no filter or other obstructions. \\ | ||
| + | |||
| + | {{:techtalk:ih:engmech:83_xlx_crankcase_vent_mod_by_83xlx.jpg?direct&300|}} ((photo by 83XLX of the XLFORUM http://xlforum.net/forums/showthread.php?t=518948&highlight=cam+chest+breather&page=3)) | ||
| ALTERNATIVES | ALTERNATIVES | ||
