Differences

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--- techtalk:evo:engmech01 [2022/10/07 22:23]
hippysmack [Cam Cover Gasket]
+++ techtalk:evo:engmech01 [2023/12/14 17:53]
hippysmack [Transmission Sprocket Cover]
@@ Line 94: / Line 94: @@
 |1994-1997 Sportster|25263-90A|
 |1998-1999 Sportster|25263-90B|
-|2000-2003 Sportster|25263-90C|**Note: Do not use a pre-2000 gasket on your cam cover** \\ A 1991-1999 style gasket WILL destroy a 2000-2003 engine! \\ See below.| \\
+|2000-2003 Sportster|25263-90C|**Note: Do not use a pre-2000 gasket on 2000-2003 cam covers** \\ A 1991-1999 style gasket WILL destroy a 2000-2003 engine! \\ See below.| \\
 \\
@@ Line 116: / Line 116: @@
 |{{: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|}}|
 ===== #2 Cam - Cover Seal (86-03) =====
@@ Line 539: / Line 557: @@
 |Year \\ Model|Part \\ Number|Casting \\ Number|Notes|
 |1986-1990 Sportster|34911-81A ((1986-1990 HD Sportster Parts Catalogs))|  |Polished|
-|1991-1994 Sportster|34911-91|  |  |
+|1991-1994 Sportster|34911-91|34913-91|Polished|
-|1995-2003 Sportster \\ (except XL883C) \\ (except XL1200C) \\ (except XL1200S)|34911-91A|  |Polished|
+|1995-2003 Sportster \\ (except XL883C) \\ (except XL1200C) \\ (except XL1200S)|34911-91A|34907-95|Polished|
-|1996-2003 XL1200C|34932-96|  |Chrome|
+|1996-2003 XL1200C|34932-96|34910-95|Chrome|
-|1998-2003 XL1200S/XL883C|34938-98|  |Silver|
+|1998-2003 XL1200S/XL883C|34938-98|34910-95|Silver|
-|2002-2003 XL883R|34943-02|  |Black|
+|2002-2003 XL883R|34943-02|34910-95|Black|
 \\
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