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techtalk:ref:engmech04 [2019/08/13 17:28]
hippysmack [Head Vents vs Cam Chest Vent]
techtalk:ref:engmech04 [2019/08/18 06:06] (current)
hippysmack [Testing the Head Drains]
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 Wet sumping is only one potential problem you may encounter with them. ((maru of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​p=3780510#​post3780510)) \\ Wet sumping is only one potential problem you may encounter with them. ((maru of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​p=3780510#​post3780510)) \\
 In the right application they can not be beat but you better have your ducks in a row. \\ In the right application they can not be beat but you better have your ducks in a row. \\
 +
 +**Buell crankcase breathing**:​ \\
 +|  This is a Buell XBRR with reed valves through the cam chest wall. ((photos by aswracing of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=829935)) ​ ||
 +|{{:​techtalk:​ref:​engmech:​reed_valves_1_on_buell_xbrr_by_aswracing.jpg?​direct&​300|}}|{{:​techtalk:​ref:​engmech:​reed_valves_2_on_buell_xbrr_by_aswracing.jpg?​direct&​300|}}|
 +
  
 ===== Why Oil Pukes Out the Air Cleaner ===== ===== Why Oil Pukes Out the Air Cleaner =====
Line 535: Line 540:
  
 So to keep oil out of the A/C, means keeping engine breathing And wet sumping in balance. ((Hippysmack of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​p=5757523#​post5757523)) \\ So to keep oil out of the A/C, means keeping engine breathing And wet sumping in balance. ((Hippysmack of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​p=5757523#​post5757523)) \\
 +
 +===== Breather Catch Can Test For Oil Leaks Out the Vent  =====
 +A test was done by XLFORUM member cjburr. Test apparatus and results are below. ((cjburr of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=53769&​highlight=valve+guide&​page=13)) \\
 +This testing was done to help diagnose an oil leak that couldn'​t be seen or otherwise detected. \\
 +However, this may be a good exercise if you are concerned about how much oil you may be losing from the crankcase puking. \\
 +It should show what, how much and when oil accumulates in the hose / catch can. \\
 +The length / size of tubing will change crankcase pressure to an extent so the results may not reflect exactly what's going on inside your engine. \\
 +
 +The vent to air cleaner was inspected and then removed for testing. The factory system routes the breathers to the front of the carb. \\
 +There was no evidence of the amount of oil that was being lost in the intake tract. \\
 +With the Forcewinder A/C removed, there was no evidence of oil.
 +A homemade catch can with a vent hole and a clear tube was installed to inspect while riding. \\
 +
 +|  A/C removed. ((photo by cjburr of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=53769&​highlight=valve+guide&​page=13)) ​ ||  Homemade catch can. ((photo by cjburr of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=53769&​highlight=valve+guide&​page=13)) ​ |
 +|{{:​techtalk:​ref:​engmech:​breather_catch_can_test_1_by_cjburr.jpg?​direct&​300|}}|{{:​techtalk:​ref:​engmech:​breather_catch_can_test_2_by_cjburr.jpg?​direct&​300|}}|{{:​techtalk:​ref:​engmech:​breather_catch_can_test_3_by_cjburr.jpg?​direct&​300|}}|
 +
 +The A/C was re-installed with the venting ran to the catch can. \\
 +The oil tank was filled to just under half way up the stick with SYN3. \\
 +The bike was ridden hard (10 miles of city driving then 50 miles of elevated speeds). \\
 +RPM was ran up to 6000 in 5th (8 times) and up to 100 MPH for 2 miles twice. \\
 +Total miles run were 75 and all but 20 miles of that were at 80 MPH or more. \\
 +The only thing that showed up in the tube running to the catch can was just some moisture but no oil. \\
 +|  The catch can was clean but 1/4 quart of oil had been lost as viewed from the dipstick. ((photo by cjburr of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=53769&​highlight=valve+guide&​page=13)) ​ |||
 +|{{:​techtalk:​ref:​engmech:​breather_catch_can_test_4_by_cjburr.jpg?​direct&​300|}}| {{:​techtalk:​ref:​engmech:​breather_catch_can_test_5_by_cjburr.jpg?​direct&​300|}}|{{:​techtalk:​ref:​engmech:​breather_catch_can_test_6_by_cjburr.jpg?​direct&​200|}}|
 +
 +
  
 ===== Breather Valves ===== ===== Breather Valves =====
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 Oil was introduced into the head with a with a turkey baster. \\ Oil was introduced into the head with a with a turkey baster. \\
 (which is probably a higher volume of oil than it normally sees from the splash oiling) \\ (which is probably a higher volume of oil than it normally sees from the splash oiling) \\
 +However, if the drains were plugged, oil would overfill to the point of spewing oil at the seams and submerge the seals. ((cjburr of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=53769&​highlight=valve+guide&​page=33)) \\ 
  
 |  Head ready for testing. ((photo by cjburr of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=53769&​highlight=valve+guide&​page=31)) ​ |  Oil poured in and draining. ((photo by cjburr of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=53769&​highlight=valve+guide&​page=31)) ​ |Oil level at the intake valve when it starts to drain to \\ the exhaust side. ((photo by cjburr of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=53769&​highlight=valve+guide&​page=31)) ​ | |  Head ready for testing. ((photo by cjburr of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=53769&​highlight=valve+guide&​page=31)) ​ |  Oil poured in and draining. ((photo by cjburr of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=53769&​highlight=valve+guide&​page=31)) ​ |Oil level at the intake valve when it starts to drain to \\ the exhaust side. ((photo by cjburr of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=53769&​highlight=valve+guide&​page=31)) ​ |
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 The scavenge inlet sees pressure but is isolated from the vacuum when the pistons go back up. \\ The scavenge inlet sees pressure but is isolated from the vacuum when the pistons go back up. \\
 </​blockquote>​ </​blockquote>​
 +
 +
 ====== Wetsumping ====== ====== Wetsumping ======
 Click to read the full article on [[techtalk:​ref:​oil10#​wet_sumping|wetsumping]] in the REF section of the Sportsterpedia. \\ Click to read the full article on [[techtalk:​ref:​oil10#​wet_sumping|wetsumping]] in the REF section of the Sportsterpedia. \\