Differences

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--- techtalk:ih:engmech04 [2021/11/05 23:17]
hippysmack [Pushrod Tubes]
+++ techtalk:ih:engmech04 [2022/10/05 22:57]
hippysmack [Rocker Box Gaskets]
@@ Line 14: / Line 14: @@
 ----
 Rocker covers are all the same technically from 1957 to 1985. ((IronMick of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073162)) \\
-Different part numbers are a different finish or style. \\
+Different part numbers are a different finish or style. The should be no concerns about mixing ones from different years respectively per side. \\
-The should be no concerns about mixing ones from different years respectively per side. \\
-There is, however, a front and a rear.\\ It has to do with the location of the oil feed lines. ((brucstoudt of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073162)) \\
+There is, however, a front and a rear. It has to do with the location of the oil feed lines. ((brucstoudt of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073162)) \\
 The front box has the hole to the rear. The rear box has the hole to the front. \\
+^{{techtalk:miscres:instruction_sheet_header_4.png?nolink&840|}}|||
+|  1957-1985 Sportster Rocker Boxes  |||
 |Year Model|  Part Number  ||
 |:::|Front|Rear|
@@ Line 28: / Line 29: @@
 {{:techtalk:ih:engmech:74_xlh_rocker_box_by_the_doctor71.jpg?direct&300|}} ((photo by The Doctor71 of the XLFORUM http://xlforum.net/forums/showthread.php?t=1946888)) \\
-===== 57-70 =====
+===== 1957-1970 =====
 |  Rocker boxes from a 68 XLCH. ((photos by ChefRex of the XLFORUM http://xlforum.net/forums/showthread.php?page=2&t=1946888))  |||
 |{{:techtalk:ih:engmech:68_rocker_boxes_1_by_chefrex.jpg?direct&300|}}|{{:techtalk:ih:engmech:68_rocker_boxes_2_by_chefrex.jpg?direct&300|}}|{{:techtalk:ih:engmech:68_rocker_boxes_3_by_chefrex.jpg?direct&300|}}|
-===== 71-85 (except XLX) =====
+===== 1971-1985 (except XLX) =====
 The 71 up have a thicker rib across the pushrod side and most people feel they're more rigid. ((mrmom9r of the XLFORUM http://xlforum.net/forums/showthread.php?t=1682099&highlight=splitting+rocker+box)) \\
 They do look better under a strobe light than the early ones. \\
@@ Line 40: / Line 41: @@
 |{{:techtalk:ih:engmech:71-85_rocker_boxes_4_by_sc72.jpg?direct&250|}}|{{:techtalk:ih:engmech:71-85_rocker_boxes_3_by_sc72.jpg?direct&250|}}|{{:techtalk:ih:engmech:71-85_rocker_boxes_2_by_sc72.jpg?direct&250|}}|
 |{{:techtalk:ih:engmech:71-85_rocker_boxes_1_by_sc72.jpg?direct&250|}}|{{:techtalk:ih:engmech:71-85_rocker_boxes_5_by_sc72.jpg?direct&250|}}|{{:techtalk:ih:engmech:71-85_rocker_boxes_6_by_sc72.jpg?direct&250|}}|
+===== Rocker Box Gaskets =====
+-1969 Sportsters did not come factory with rocker box gaskets. \\
+Instead, a layer of silver paint was applied between each rocker box and head for sealing. \\
+In 1970, a gasket (17536-70) was introduced and retros back to 1957 models. The same gasket is used on each rocker box (2 required). \\
+{{:techtalk:ih:engmech:1957-1985_sportster_rocker_box_gaskets_17536-70_by_jrsvintageharley1990.jpg?direct&400|}} ((photo courtesy of Ebay seller, jrsvintageharley1990. [[https://www.ebay.com/str/jrsvintageharleyparts?_trksid=p2047675.l2563|Link to Ebay Store]]  )) \\
 ====== Rocker Arms ======
 |  Rocker arms on a 69 XLH ((photos by austinshovel of the XLFORUM http://xlforum.net/forums/showthread.php?t=1913766&highlight=rocker+arm+bushings))  ||
@@ Line 45: / Line 54: @@
 ====== Pushrod Tubes ======
-**Pushrod tube orientation by Dr Dick** ((http://xlforum.net/forums/showpost.php?p=3855693&postcount=11)) \\
+===== Pushrod Tube Orientation =====
+The 1959-1969 Service manual has an (errored) illustration of the pushrod tube assembly. \\
+The illustration shows the bottom tube upside down with the flared end facing the tappet block. \\
+This is incorrect and has been corrected in the 1970-1978 as well as the 1979-1985 service manuals. \\
+The flat end goes down and the flared end goes up. \\
+And here is why.  (Pushrod tube orientation by Dr Dick) ((http://xlforum.net/forums/showpost.php?p=3855693&postcount=11)) \\
 Pushrod tubes seal in 3 places. 2 of those, the upper and lower corks, seal on their flat faces. \\
 Now think about the center cork. What does it seal? \\

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