Differences
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techtalk:evo:engmech01g [2022/04/01 04:54] hippysmack [Circle Date Code (1986-2006)] |
techtalk:evo:engmech01g [2022/04/04 14:17] (current) hippysmack [2004-E2007 Covers] |
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| 1998-1999 Sportster cam covers: casting number (25230-98). \\ | 1998-1999 Sportster cam covers: casting number (25230-98). \\ | ||
| 2000-2003 Sportster cam covers: casting number (25230-98A). \\ | 2000-2003 Sportster cam covers: casting number (25230-98A). \\ | ||
| - | 2004- Sportster cam covers: casting number (25230-04). \\ | + | 2004-E2007 Sportster cam covers: casting number (25230-04). \\ |
| + | L2007-Up Sportster cam covers: casting number (25230-04A). \\ | ||
| ====== Date Codes ====== | ====== Date Codes ====== | ||
| ===== Model Season ===== | ===== Model Season ===== | ||
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| |{{:techtalk:ih:engmech:1985_xl-xls_cam_cover_25208-84a_by_nitrofrankie_go-fast_hd_pic4.jpg?direct&300|}}|{{:techtalk:evo:engmech:1986-1990_sportster_cam_cover_25219-86_by_deadpartsmc_pic5.jpg?direct&300|}}|{{:techtalk:evo:engmech:1986-1990_sportster_cam_cover_date_codes.jpg?direct&300|}}| | |{{:techtalk:ih:engmech:1985_xl-xls_cam_cover_25208-84a_by_nitrofrankie_go-fast_hd_pic4.jpg?direct&300|}}|{{:techtalk:evo:engmech:1986-1990_sportster_cam_cover_25219-86_by_deadpartsmc_pic5.jpg?direct&300|}}|{{:techtalk:evo:engmech:1986-1990_sportster_cam_cover_date_codes.jpg?direct&300|}}| | ||
| + | ===== Machining Dates (2004-up) ===== | ||
| + | 2004-up cam covers have a several numbers pin stamped on the inside of the cover. \\ | ||
| + | Original location was on the rear near the oil tank breather fitting. \\ | ||
| + | Later covers were stamped on the inside front in the round portion behind the oil filter mount. \\ | ||
| + | There are 2 sets of numbers with the first being the month, day and year of machining (holes drilled, bushings installed/reamed etc.) \\ | ||
| + | The next set of numbers are for unknown reasons at this time. \\ | ||
| + | The unknown numbers may be production, control or operator numbers and possibly a mix of the same. \\ | ||
| - | ====== 1986-1990 Cam Cover ====== | + | 2004-2006 covers also have a circled date stamp that was faded out for model season 2007. \\ |
| + | As per usual, the remainder of 2006 covers were used out in the early part of the 2007 season (running change). \\ | ||
| + | So 2004-2006 and some 2007 covers will have both machining dates and casting dates. \\ | ||
| + | ====== 1986-1990 Cam Covers ====== | ||
| The same HD part number (25219-86) was used for 1986-1990 cam covers. \\ | The same HD part number (25219-86) was used for 1986-1990 cam covers. \\ | ||
| The casting number is (25222-84A) for all L1984-1990 cam covers and all have a circle date code below the casting. \\ | The casting number is (25222-84A) for all L1984-1990 cam covers and all have a circle date code below the casting. \\ | ||
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| {{:techtalk:evo:engmech:1986-1990_sportster_cam_cover_25219-86_by_deadpartsmc_pic5.jpg?direct&300|}} ((photo courtesy of DeadpartsMC, [[https://www.ebay.com/str/deadpartsmc|Link to Ebay Store]] )) \\ | {{:techtalk:evo:engmech:1986-1990_sportster_cam_cover_25219-86_by_deadpartsmc_pic5.jpg?direct&300|}} ((photo courtesy of DeadpartsMC, [[https://www.ebay.com/str/deadpartsmc|Link to Ebay Store]] )) \\ | ||
| + | ====== 2004-Up Cam Covers ====== | ||
| + | There are only 4 cam cover part number changes on 2004-2016 Sportsters, and most likely beyond and not counting XR models. \\ | ||
| + | They are the same cover with different finishes: polished, chrome, black or gray. \\ | ||
| + | The XR cover is a completely different design. \\ | ||
| + | Figuring that there was a casting/design change in 2007, that leaves a total of 2 versions of these covers not counting surface finish or XRs. \\ | ||
| + | |||
| + | **2007 Casting number change**: \\ | ||
| + | The same casting design (25230-04) was used from 2004 through an early 2007 running design change to casting# (25230-04A). \\ | ||
| + | The casting number change has a direct correlation to the removal of casting bumps in the feed galley of the cover. \\ | ||
| + | Casting# (25230-04) has the casting bumps in the feed galley. Casting# (25230-04A) does not have the casting bumps in the feed galley. \\ | ||
| + | In 2007, the MoCo made a drastic change to the gerotor sizes in the oil pump. Both feed and scavenge gerotor sets got much taller than before. \\ | ||
| + | As a result, the scavenge volume increased and according to measurements, the feed side volume was slightly reduced compared to 2006-earlier design. \\ | ||
| + | With 2007 oil pumps having slightly less feed volume, it's possible the removal of casting bumps in the cover were to free up oil flow. \\ | ||
| + | [[techtalk:evo:oil03g|Click Here]] to read more on the Volume and Flow Comparison between 2006 and 2007 oil pumps in the Sportsterpedia. \\ | ||
| + | | E2007 Cam Cover (casting# 25230-04) ((photo courtesy of DeadpartsMC, [[https://www.ebay.com/str/deadpartsmc|Link to Ebay Store]] )) | | ||
| + | |{{:techtalk:evo:engmech:2007e_sportster_cam_cover-_inside_by_deadpartsmc.jpg?direct&300|}}| | ||
| + | |||
| + | ===== 2004-E2007 Covers ===== | ||
| + | |||
| + | ===== L2007-Up Covers ===== | ||
