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techtalk:evo:engmech02 [2022/09/10 03:57] hippysmack [Outer Bushings] |
techtalk:evo:engmech02 [2023/08/13 02:08] ixl2relax [Sub Documents] |
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| [[:techtalk:menu|{{ :techtalk:gototechnicalmenu.jpg|}}]] | [[:techtalk:menu|{{ :techtalk:gototechnicalmenu.jpg|}}]] | ||
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| ====== EVO: Engine Mechanicals ====== | ====== EVO: Engine Mechanicals ====== | ||
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| ====== Camshafts ====== | ====== Camshafts ====== | ||
| + | The cams get oiled by drainage from the rocker boxes and splash oil in the bottom end. \\ | ||
| + | Oil flows off the pushrod side of the rocker boxes through the pushrod covers, into vertical holes in the lifter bores and into the gearcase. \\ | ||
| + | Oil falls on the cam lobes on the way down this hole. Some of this oil is transferred between the gear teeth. \\ | ||
| + | The rear intake (#2) cam gets a little oil spray from the right case oil feed galley through the small orifice underneath the open cavity in the case. \\ | ||
| + | That oil is transferred between the teeth of the cams. \\ | ||
| + | Oil flung off the cams lands in the gearcase to be collected into the scavenge (return) side of the oil pump. \\ | ||
| + | |||
| + | 1992-up Cam Gear Oiler Hole in the Right Case. \\ | ||
| + | Below are pics of the restricted orifice underneath the oil feed galley in the case that shoots a small stream onto #2 cam. \\ | ||
| + | #2 cam rotates counterclockwise and the oil is sprayed on the right side of the cam gear for extra cooling (transferred to all cams). | ||
| + | |||
| + | | (L) 92-99 ((photo by Hippysmack of the XLFORUM)), (R) 2000 Up ((photo by Bruce of the XLFORUM http://xlforum.net/forums/showthread.php?t=1118529&page=2up)) cam oiling hole from the feed galley || | ||
| + | | {{:techtalk:evo:oil:92-99_cam_oiler_hole_by_hippysmack.jpg?direct&300|}} |{{:techtalk:evo:oil:2000_up_cam_oiler_hole_by_bruce.jpg?direct&300|}}| | ||
| + | |||
| ===== Cam Specs - OEM & SE ===== | ===== Cam Specs - OEM & SE ===== | ||
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| ===== Removing / Installing Evo Cams ===== | ===== Removing / Installing Evo Cams ===== | ||
| - | ===== Sub Documents ===== | + | ==== Sub Documents ==== |
| * [[techtalk:evo:engmech02a|Installing Evo Cams (91 and Up)]] | * [[techtalk:evo:engmech02a|Installing Evo Cams (91 and Up)]] | ||
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| |{{:techtalk:evo:oil:cam_bushing_oiling_6_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:cam_bushing_oiling_8_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:cam_bushing_oiling_7_by_hippysmack.jpg?direct&300|}}| | |{{:techtalk:evo:oil:cam_bushing_oiling_6_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:cam_bushing_oiling_8_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:cam_bushing_oiling_7_by_hippysmack.jpg?direct&300|}}| | ||
| - | ===== Cam Cover Gasket ===== | ||
| - | 1977-up Sportster engines have an internal rifling hole drilled into the lower left side of the case running past the left side of the oil pump. \\ | ||
| - | That extra hole (in the picture below) is benign and doesn't need a hole in the gasket to match. \\ | ||
| - | That hole is purely an artifact of how they connected two passages for routing crankcase oil up to the oil pump's scavenge section. \\ | ||
| - | They drill that hole to connect the two passages, and then it gets blocked off naturally by the cam box cover and gasket. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=2036109&highlight=oil+pump&page=3)) \\ | ||
| - | |||
| - | Also, in 2000, the factory changed the oil routing to the lifters to make manufacturing the cases easier. \\ | ||
| - | The newer cam cover on the left in the pic below and has two extra grooves along the top. These grooves let oil get to the lifters. \\ | ||
| - | If you have an older style gasket, it will not have cutouts for the grooves and you won't get oil to the lifters. \\ | ||
| - | |||
| - | | Rubbermount Evo vs Rigid Evo Cam Cover Internals ((photo by Moved On of the XLFORUM http://xlforum.net/forums/showthread.php?t=87313)) | | ||
| - | |{{:techtalk:evo:oil:rubbermount_vs_rigid_evo_cam_cover_comparison_by_moved_on.jpg?direct&600|}}| | ||
| - | | Both have been chopped on the outside but the gearcase perimeter is intact on them for reference. | | ||
| - | |||
| - | | 1991-1999 cam cover gasket ((photo by Hippysmack)) | 1991-1999 cam cover seals off the extra hole. ((photos by Hippysmack)) || | ||
| - | |{{:techtalk:evo:oil:91-99_cam_cover_gasket_2_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:91-99_cam_cover_gasket_1_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:oil:91-99_cam_cover_gasket_4_by_hippysmack.jpg?direct&300|}}| | ||
| - | |||
| - | | 2000-up cam cover gasket ((photo by Phillober of the XLFORUM http://xlforum.net/forums/showthread.php?t=1122547&page=7)) |2000-up gasket seals off the extra hole. ((sep69 of the XLFORUM http://xlforum.net/forums/showthread.php?t=2036109&highlight=oil+pump&page=3))| | ||
| - | |{{:techtalk:evo:oil:2000_up_cam_cover_gasket_by_phillober.jpg?direct&300|}}|{{:techtalk:evo:oil:cam_cover_gasket_on_03_model_by_sep69.jpg?direct&300|}}| | ||
| - | \\ | ||
| - | |||
| - | ==== DON'T INSTALL a 91-99 CAM COVER GASKET ON A 2000-UP MOTOR!!!!!!! ==== | ||
| - | |||
| - | The 91-99 cam cover gasket has no business being on a 2000+ motor at all. It will cause you to lose all oil pressure. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=2079110&highlight=oil+tank&page=14)) \\ | ||
| - | The 2000+ gasket supersedes the 91-99 gasket. In other words, it can be used all the way back to 1991. \\ | ||
| - | Most companies completely dropped the 91-99 specific gasket and only offer the one that can be used from 1991-present. \\ | ||
| - | Either James Gasket hasn't done that, or they may have some old stock. \\ | ||
| - | |||
| - | The 1991-1999 lifter feed galley is an internal rifling hole in the case. It's drilled thru the case and only open to the cam cover via the center port to the pinion bushing. \\ | ||
| - | The 2000-up lifter feed galley is external and it takes both the cover and the case mounted together to make up the feed galley. \\ | ||
| - | So 2000-up feed galley is split in half between the case and cover. The slots in the 2000-up cam cover gasket mate to both the case and the cover. \\ | ||
| - | If you have the correct gasket on there, oil would be forced (between the cover and case) to all the lifter feed holes and piston squirters. \\ | ||
| - | With the wrong gasket (1991-1999), oil pressure leaving the filter gets into that (now open) galley. \\ | ||
| - | Then the oil will blow into into the cam chest, therefore bypassing the lifters, piston squirters and rod bearings. \\ | ||
| - | The oil will simply cycle from the oil pump to cam chest to oil pump and back to the oil tank. \\ | ||
| - | The oil light will stay off so you'll get no notice before moving the parts start oil starving and making noises and worse if the noises aren't heeded to quickly. \\ | ||
| - | | 2000-up motor with 1991-1999 cam cover gasket. ((photo by BestCoastXL of the XLFORUM http://xlforum.net/forums/showthread.php?t=2079110&highlight=oil+tank&page=12)) | Below is a rough cross section of the joint in the \\ feed galley at that first slotted run. ((drawing by Hippysmack)) | | ||
| - | |{{:techtalk:evo:oil:2000-up_sportster_with_wrong_91-99_cam_cover_gasket_by_bestcoastxl.jpg?direct&300|}}|{{:techtalk:evo:oil:2000-up_sportster_with_wrong_91-99_cam_cover_gasket_by_hippysmack.png?direct&300|}}| | ||
| ====== Lifters (tappets) ====== | ====== Lifters (tappets) ====== | ||
| - | ===== Sub-Documents ===== | + | ==== Sub-Documents ==== |
| * [[techtalk:evo:engmech02b|91-99 Lifter Pin Upgrade to 00-05 Lifter Pin Screws]] | * [[techtalk:evo:engmech02b|91-99 Lifter Pin Upgrade to 00-05 Lifter Pin Screws]] | ||
| * [[techtalk:evo:engmech02c|Hydraulic Lifter - Mechanical and Hydraulic Operation]] | * [[techtalk:evo:engmech02c|Hydraulic Lifter - Mechanical and Hydraulic Operation]] | ||
| + | * [[techtalk:evo:engmech02d|Why 1986-up Lifters Clack on Initial Startup]] | ||
| See also in the Sportsterpedia; \\ | See also in the Sportsterpedia; \\ | ||
