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techtalk:ref:engmech04g [2019/11/08 00:53] hippysmack [Testing from cold startup] |
techtalk:ref:engmech04g [2020/10/25 23:30] hippysmack [REF: Engine Mechanicals - Sub-04G] |
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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: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 future testing was done with the engine up to operating temperature with oil temp at 200°F. \\ | All future testing was done with the engine up to operating temperature with oil temp at 200°F. \\ | ||
- | ====== Initial Test (engine at operating temp) ====== | + | ===== Initial Test (engine at operating temp) ===== |
This is the first official test that was done with the engine up to temp. \\ | This is the first official test that was done with the engine up to temp. \\ | ||
Green food coloring in tap water was used as the liquid media. \\ | Green food coloring in tap water was used as the liquid media. \\ | ||
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{{: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 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)) \\ | ||
- | ====== Test after replacing the umbrellas ====== | + | ===== Test after replacing the umbrellas ===== |
Upon removal of the old umbrellas, the rear one was a little stiffer than the front but still would bend over (just not as much as the front would). \\ | Upon removal of the old umbrellas, the rear one was a little stiffer than the front but still would bend over (just not as much as the front would). \\ | ||
The front was just as flimsy as a new one. \\ | The front was just as flimsy as a new one. \\ | ||
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{{: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 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)) | ||
- | ====== 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) \\ | ||
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{{: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 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 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 http://xlforum.net/forums/showthread.php?t=2073932&page=84)) \\ | ||
+ | |||
+ | {{: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_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_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)) \\ | ||
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{{: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_3-2_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)) \\ | ||
+ | ===== Test for oil cap issue when removed at idle ===== | ||
+ | Before the umbrellas were replaced it was noticed that, at hot idle and the oil cap removed, the engine speed would stumble and sometimes shut down. \\ | ||
+ | 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)) \\ | ||
+ | |||
+ | 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. \\ | ||
+ | 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|}} ((photo by Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073932&page=79)) \\ | ||
+ | |||
+ | The umbrellas were replaced with new ones and the test performed again. \\ | ||
+ | The overall vacuum decreased at idle with the new umbrellas. \\ | ||
+ | When the oil cap was removed, only 2-1/4" (4-1/2" WC) was lost and there was only a slight pitch change in the engine with no noticeable amount on the tach. \\ | ||
+ | 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)) \\ | ||
+ | |||
+ | ===== 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 http://xlforum.net/forums/showthread.php?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 http://xlforum.net/forums/showthread.php?t=2073932&page=82)) \\ | ||
\\ | \\ |