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techtalk:ref:engmech04g [2019/11/08 01:22]
hippysmack [Test for oil cap issue when removed at idle]
techtalk:ref:engmech04g [2023/12/26 23:09] (current)
hippysmack
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 [[:​techtalk:​menu|{{ ​ :​techtalk:​gototechnicalmenu.jpg|}}]] [[:​techtalk:​menu|{{ ​ :​techtalk:​gototechnicalmenu.jpg|}}]]
 ====== REF: Engine Mechanicals - Sub-04G ====== ====== REF: Engine Mechanicals - Sub-04G ======
 +
 +See also in the Sportsterpedia:​ \\
 +
 +  * [[techtalk:​ref:​tools173#​manometer_slack_tube_for_measuring_air_pressure|Manometer (slack tube) for Measuring Air Pressure]]
 +  * [[techtalk:​ref:​engmech04e|Building Your Own Slack Tube]]
 +  * [[techtalk:​ref:​genmsr04#​using_diagnosing_with_a_slack_tube_manometer|Using / Diagnosing with a Slack Tube (Manometer)]]
 +  * [[techtalk:​ref:​engmech04|Evo Crankcase Pressure and Engine Breathing]]
 +  * [[techtalk:​ref:​engmech07p|Testing with a Slack Tube (Manometer) by bustert]]
 +  * [[techtalk:​ref:​genmsr04#​using_diagnosing_with_a_slack_tube_manometer|Using / Diagnosing with a Slack Tube (Manometer)]]
 +  * [[techtalk:​ref:​oil05#​engine_and_primary_oil_system_modifications|Engine and Primary Oil System Modifications]]
 +  * [[techtalk:​ref:​oil10|Wet Sumping]]
 +  * [[techtalk:​ref:​engmech05|Breather Venting / Relocation]]
 +
 \\ \\
 ====== Slack tube testing on a 1998 1250S model  ====== ====== Slack tube testing on a 1998 1250S model  ======
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 All testing done with green coloring below was done with 36" ruler with reference zero at 18-1/​8"​ on the ruler as shown below. \\ All testing done with green coloring below was done with 36" ruler with reference zero at 18-1/​8"​ on the ruler as shown below. \\
  
-{{:​techtalk:​ref:​engmech:​homemade_slack_tube_2_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​p=5784790#post5784790)) {{:​techtalk:​ref:​engmech:​homemade_slack_tube_5_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​p=5784790#post5784790)) {{:​techtalk:​ref:​engmech:​hst_testing_reference_zero_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2073932&​page=79)) \\+{{:​techtalk:​ref:​engmech:​homemade_slack_tube_2_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page52#post4349847)) {{:​techtalk:​ref:​engmech:​homemade_slack_tube_5_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page52#post4349847)) {{:​techtalk:​ref:​engmech:​hst_testing_reference_zero_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page79?​t=2073932&​page=79)) \\
  
 ====== Summaries from Slack Tube Testing ====== ====== Summaries from Slack Tube Testing ======
- +Before changing to new umbrellas; ((Hippysmack of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page84?​t=2073932&​page=84)) \\
-Before changing to new umbrellas; ((Hippysmack of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2073932&​page=84)) \\+
   - The rear umbrella was more stiff than the front one which was 'like new'.   - The rear umbrella was more stiff than the front one which was 'like new'.
   - The oil cap could be removed at hot idle and the engine stumbled or died.   - The oil cap could be removed at hot idle and the engine stumbled or died.
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 The umbrella valves were in used state. The front umbrella had about 6 months use. \\ The umbrella valves were in used state. The front umbrella had about 6 months use. \\
  
-{{:​techtalk:​ref:​engmech:​hst_testing_reference_zero_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2073932&​page=79)) {{:​techtalk:​ref:​engmech:​hst_testing_1_at_1000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2073932&​page=79)) {{:​techtalk:​ref:​engmech:​hst_testing_1_at_2000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2073932&​page=79)) \\+{{:​techtalk:​ref:​engmech:​hst_testing_reference_zero_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page79?​t=2073932&​page=79)) {{:​techtalk:​ref:​engmech:​hst_testing_1_at_1000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page79?​t=2073932&​page=79)) {{:​techtalk:​ref:​engmech:​hst_testing_1_at_2000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page79?​t=2073932&​page=79)) \\
  
-{{:​techtalk:​ref:​engmech:​hst_testing_1_at_3000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2073932&​page=79)) {{:​techtalk:​ref:​engmech:​hst_testing_1_at_4000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2073932&​page=79)) {{:​techtalk:​ref:​engmech:​hst_testing_1_at_5000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2073932&​page=79)) \\+{{:​techtalk:​ref:​engmech:​hst_testing_1_at_3000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page79?​t=2073932&​page=79)) {{:​techtalk:​ref:​engmech:​hst_testing_1_at_4000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page79?​t=2073932&​page=79)) {{:​techtalk:​ref:​engmech:​hst_testing_1_at_5000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page79?​t=2073932&​page=79)) \\
  
 ===== Test after replacing the umbrellas ===== ===== Test after replacing the umbrellas =====
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 There was no noticeable sign of wetsumping or oil puking out the breathers even before any of this testing began. \\ There was no noticeable sign of wetsumping or oil puking out the breathers even before any of this testing began. \\
  
-{{:​techtalk:​ref:​engmech:​hst_testing_reference_zero_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2073932&​page=79)) {{:​techtalk:​ref:​engmech:​hst_testing_2_at_1000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2073932&​page=82)) {{:​techtalk:​ref:​engmech:​hst_testing_2_at_2000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2073932&​page=82)) \\+{{:​techtalk:​ref:​engmech:​hst_testing_reference_zero_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page79?​t=2073932&​page=79)) {{:​techtalk:​ref:​engmech:​hst_testing_2_at_1000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page82?​t=2073932&​page=82)) {{:​techtalk:​ref:​engmech:​hst_testing_2_at_2000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page82?​t=2073932&​page=82)) \\
  
-{{:​techtalk:​ref:​engmech:​hst_testing_2_at_3000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2073932&​page=82)) {{:​techtalk:​ref:​engmech:​hst_testing_2_at_4000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2073932&​page=82)) {{:​techtalk:​ref:​engmech:​hst_testing_2_at_5000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2073932&​page=82)) ​+{{:​techtalk:​ref:​engmech:​hst_testing_2_at_3000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page82?​t=2073932&​page=82)) {{:​techtalk:​ref:​engmech:​hst_testing_2_at_4000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page82?​t=2073932&​page=82)) {{:​techtalk:​ref:​engmech:​hst_testing_2_at_5000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page82?​t=2073932&​page=82)) ​
  
 ===== Test with reduced breather bolt orifices ===== ===== Test with reduced breather bolt orifices =====
- 
 This was done to see what the affects were of the restricted breather bolts in 04-up engines. \\ This was done to see what the affects were of the restricted breather bolts in 04-up engines. \\
 (to see if the restricted hole itself has an affect on pressure on the inside and if so how much) \\ (to see if the restricted hole itself has an affect on pressure on the inside and if so how much) \\
Line 119: Line 130:
 And it was easier to spot for oil mist from the bolts which there wasn't any. \\ And it was easier to spot for oil mist from the bolts which there wasn't any. \\
  
-{{:​techtalk:​ref:engmech:hst_testing_reference_zero_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2073932&​page=79)) {{:​techtalk:​evo:​engmech:​making_91-03_breather_bolt_holes_smaller_pic_5_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?​t=2073932&​page=84)) +{{:​techtalk:​evo:engmech:making_91-03_breather_bolt_holes_smaller_pic_5_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page84?​t=2073932&​page=84)) 
-{{:​techtalk:​evo:​engmech:​making_91-03_breather_bolt_holes_smaller_pic_7_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2073932&​page=84)) \\+{{:​techtalk:​evo:​engmech:​making_91-03_breather_bolt_holes_smaller_pic_7_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page84?​t=2073932&​page=84)) \\
  
-{{:​techtalk:​ref:​engmech:​hst_testing_3-1_at_1000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2073932&​page=85)) {{:​techtalk:​ref:​engmech:​hst_testing_3-2_at_1000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?​t=2073932&​page=85)) {{:​techtalk:​ref:​engmech:​hst_testing_3-2_restriction_at_2000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2073932&​page=85)) \\+{{:​techtalk:​ref:​engmech:​hst_testing_reference_zero_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/page79?​t=2073932&​page=79)) {{:​techtalk:​ref:​engmech:​hst_testing_2_at_1000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​https://www.xlforum.net/​forum/​sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page82?​t=2073932&​page=82)) \\
  
-{{:​techtalk:​ref:​engmech:​hst_testing_3-2_restriction_at_3000_rpm_by_hippysmack_2_.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2073932&​page=85)) {{:​techtalk:​ref:​engmech:​hst_testing_3-2_restriction_at_4000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2073932&​page=85)) {{:​techtalk:​ref:​engmech:​hst_testing_3-2_restriction_at_5000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2073932&​page=85)) \\+{{:​techtalk:​ref:​engmech:​hst_testing_3-1_at_1000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page85?​t=2073932&​page=85)) {{:​techtalk:​ref:​engmech:​hst_testing_3-2_at_1000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM https://​www.xlforum.net/​forum/​sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page85?​t=2073932&​page=85)) {{:​techtalk:​ref:​engmech:​hst_testing_3-2_restriction_at_2000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page85?​t=2073932&​page=85)) \\ 
 + 
 +{{:​techtalk:​ref:​engmech:​hst_testing_3-2_restriction_at_3000_rpm_by_hippysmack_2_.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM https://​www.xlforum.net/​forum/​sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page85?​t=2073932&​page=85)) {{:​techtalk:​ref:​engmech:​hst_testing_3-2_restriction_at_4000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page85?​t=2073932&​page=85)) {{:​techtalk:​ref:​engmech:​hst_testing_3-2_restriction_at_5000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM https://​www.xlforum.net/​forum/​sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page85?​t=2073932&​page=85)) \\
  
 ===== Test for oil cap issue when removed at idle ===== ===== Test for oil cap issue when removed at idle =====
Line 130: Line 143:
 The slack tube was hooked up to help diagnose the problem. \\ The slack tube was hooked up to help diagnose the problem. \\
  
-{{:​techtalk:​ref:​engmech:​hst_testing_reference_zero_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2073932&​page=79)) \\+{{:​techtalk:​ref:​engmech:​hst_testing_reference_zero_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page79?​t=2073932&​page=79)) \\
  
 Before the new umbrellas, 3-3/4" (7-1/​2"​ WC) of vacuum was lost while removing the oil cap and the engine died when removing the cap. \\ Before the new umbrellas, 3-3/4" (7-1/​2"​ WC) of vacuum was lost while removing the oil cap and the engine died when removing the cap. \\
 The idle changed with slight movements of the cap being closer to or farther away from the oil tank neck opening. \\ The idle changed with slight movements of the cap being closer to or farther away from the oil tank neck opening. \\
 +There was oil frothing in the oil tank with the cap off at idle. The frothing got less when the cap was '​slightly'​ off. \\
 +It didn't have any affect pulling the cap at cold idle. \\
  
-{{:​techtalk:​ref:​engmech:​hst_testing_1_at_1000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2073932&​page=79)) {{:​techtalk:​ref:​engmech:​hst_testing_oil_cap_removed_at_1000_rpm_by_hippysmack.jpg?​direct&​300|}} \\+{{:​techtalk:​ref:​engmech:​hst_testing_1_at_1000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page79?​t=2073932&​page=79)) {{:​techtalk:​ref:​engmech:​hst_testing_oil_cap_removed_at_1000_rpm_by_hippysmack.jpg?​direct&​300|}} ​((photo by Hippysmack of the XLFORUM https://​www.xlforum.net/​forum/​sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page79?​t=2073932&​page=79)) ​\\
  
 The umbrellas were replaced with new ones and the test performed again. \\ The umbrellas were replaced with new ones and the test performed again. \\
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 No frothing in the oil tank now with the cap removed at idle. So it appears the problem was a stiff umbrella valve (rear). \\ No frothing in the oil tank now with the cap removed at idle. So it appears the problem was a stiff umbrella valve (rear). \\
  
-{{:​techtalk:​ref:​engmech:​hst_testing_2_at_1000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2073932&​page=82)) ​ {{:​techtalk:​ref:​engmech:​hst_testing_2_at_1000_rpm_no_oil_cap_by_hippysmack.jpg?​direct&​300|}} ​    ​((photo by Hippysmack of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2073932&​page=84)) \\+{{:​techtalk:​ref:​engmech:​hst_testing_2_at_1000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page82?​t=2073932&​page=82)) ​ {{:​techtalk:​ref:​engmech:​hst_testing_2_at_1000_rpm_no_oil_cap_by_hippysmack.jpg?​direct&​300|}} ​    ​((photo by Hippysmack of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page84?​t=2073932&​page=84)) ​\\ 
 + 
 +===== Test with air cleaner removed ===== 
 +The A/C was removed to see if it had any impact on crankcase pressure testing. \\ 
 +There was no noticeable difference with it off through the RPM range tested up to 5000. \\ 
 +There was also no noticeable oil mist during this period. \\ 
 +Condensation and light oil mist accumulation at the bolts was from original testing before replacing the umbrellas. \\ 
 +But none of this is was in the filter and no oil puking. \\ 
 + 
 +{{:​techtalk:​ref:​engmech:​hst_testing_2_at_1000_rpm_no_ac_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM https://​www.xlforum.net/​forum/​sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page82?​t=2073932&​page=82)) 
 +{{:​techtalk:​ref:​engmech:​hst_testing_2_ac_removed_at_1000_rpm_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack of the XLFORUM https://​www.xlforum.net/​forum/​sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​197307-sportster-crankcase-pressure-engine-breathing-wetsumping-and-mods/​page82?​t=2073932&​page=82))  ​\\
  
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