Differences

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--- techtalk:ref:engmech01h [2019/08/16 13:59]
hippysmack [Rocker Box]
+++ techtalk:ref:engmech01h [2020/08/24 01:58]
hippysmack [Test Fitting]
@@ Line 1: / Line 1: @@
 [[:techtalk:menu|{{  :techtalk:gototechnicalmenu.jpg|}}]]
 ====== REF: Engine Mechanicals - Sub-01H ======
-====== Clearancing for and Test Fitting Cams ======
+====== Clearancing For and Test Fitting Cams ======
 ====== Clearancing ======
+It's important to state that none of these mods are mandatory unless there is a clearance problem with upgraded parts. \\
+The MoCo has already done all the clearancing needed OEM parts. \\
+Upgrades such as bigger cams and valves sometimes comes with more clearancing needed. \\
+Below are some examples of clearance issues to check before / during assembly. \\
 ==== Cam Lobes ====
 |The underside of the lifter bosses often need a little \\ grinding to keep the cam lobes from contacting. ((photo by aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?p=668404#post668404))|Big cam lobes also may try to hit the pinion race, \\ which protrudes from the case slightly. It sticks out \\ farther on 2000-up motors. ((photo by aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?p=668404#post668404))|If the lobe is contacting the pinion race, it's better to \\ modify the lobe than the race (this is a Red Shift 567). \\ Notice the chamfer on the lobe below. Modifying that \\ race is difficult and risky. People have done it and \\ trashed the bearing in the process. ((photo by aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?p=668404#post668404))|
 |{{:techtalk:ref:engmech:clearancing_the_engine_for_bigger_cams_1_by_aswracing.jpg?direct&300|}}|{{:techtalk:ref:engmech:clearancing_the_engine_for_bigger_cams_2_by_aswracing.jpg?direct&300|}}|{{:techtalk:ref:engmech:clearancing_the_engine_for_bigger_cams_3_by_aswracing.jpg?direct&300|}}|
+An example of chamfering the cam lobes was done by XLF member ~Grind~: ((http://xlforum.net/forums/showthread.php?t=1448694)) \\
+{{:techtalk:ref:engmech:clearancing_cam_lobes_1_by_grind.jpg?direct&170|}} ((photo by ~Grind~ of the XLFORUM http://xlforum.net/forums/showthread.php?t=1448694)) {{:techtalk:ref:engmech:clearancing_cam_lobes_2_by_grind.jpg?direct&170|}}  ((photo by ~Grind~ of the XLFORUM http://xlforum.net/forums/showthread.php?t=1448694)) {{:techtalk:ref:engmech:clearancing_cam_lobes_3_by_grind.jpg?direct&170|}} ((photo by ~Grind~ of the XLFORUM http://xlforum.net/forums/showthread.php?t=1448694)) \\
+{{:techtalk:ref:engmech:clearancing_cam_lobes_4_by_grind.jpg?direct&170|}} ((photo by ~Grind~ of the XLFORUM http://xlforum.net/forums/showthread.php?t=1448694)) {{:techtalk:ref:engmech:clearancing_cam_lobes_5_by_grind.jpg?direct&170|}} ((photo by ~Grind~ of the XLFORUM http://xlforum.net/forums/showthread.php?t=1448694)) {{:techtalk:ref:engmech:clearancing_cam_lobes_6_by_grind.jpg?direct&170|}} ((photo by ~Grind~ of the XLFORUM http://xlforum.net/forums/showthread.php?t=1448694)) \\
 ==== Lifters ====
+See also [[techtalk:evo:engmech02b|91-99 Lifter Pin Upgrade to 00-05 Lifter Pin Screws]] in the Sportsterpedia. \\
 Another thing to check is tappet pin clearance. ((aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?p=668404#post668404)) \\
@@ Line 27: / Line 38: @@
 Easy to fix with some careful, slight grinding on the tappet on the underside of the axle support boss. \\
+==== Lifter Bore O.D. ====
+Big cam lobes can hit against the lifter bore O.D. \\
+Below, the area where the cam lobe spins around was clearance using a sanding drum. \\
+Four plugs were made to go in the camshaft bushings to keep from hitting them with the die grinder. \\
+{{:techtalk:ref:engmech:clearancing_lifter_bore_od_1_by_grind.jpg?direct&170|}} ((photo by ~Grind~ of the XLFORUM http://xlforum.net/forums/showthread.php?t=1448694)) {{:techtalk:ref:engmech:clearancing_lifter_bore_od_2_by_grind.jpg?direct&170|}} ((photo by ~Grind~ of the XLFORUM http://xlforum.net/forums/showthread.php?t=1448694))  {{:techtalk:ref:engmech:clearancing_lifter_bore_od_3_by_grind.jpg?direct&170|}} ((photo by ~Grind~ of the XLFORUM http://xlforum.net/forums/showthread.php?t=1448694))  \\
 ==== Rocker Box ====
 See more on [[techtalk:evo:engmech04b#rocker_box_rocker_arm_inspection_and_servicing|Clearancing and inspecting the Rocker Boxes]] in the Sportsterpedia. \\
@@ Line 85: / Line 102: @@
 Use a fair amount of assembly lube in the bushings and in the gear teeth. \\
 Rotate them by hand and make sure they all spin freely without binding. \\
+Then, install all 4 cams in the cam cover and make sure they spin freely without binding. \\
+On 2003 and earlier motors, the cams can be rotated thru the nosecone ignition cover. 2004-up covers don't have this hole. \\
+However, several folks have ran 2000-2003 covers on 3004-up motors with no issues. ((NRHS Sales of the XLFORUM http://xlforum.net/forums/showthread.php?t=1756724&page=23)) \\
-Then, install all 4 cams in the cam cover and make sure they spin freely without binding.
+|  Test fitting cams in the cam cover ((photo by aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1715966&page=3))  |Test fitting cams with the cam cover installed ((photo by aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1840595))|
+|{{:techtalk:ref:engmech:test_fit_cams_in_cam_cover_by_aswracing.jpg?direct&300|}}|{{:techtalk:ref:engmech:test_fitting_cams_with_the_cam_cover_on_by_aswracing.jpg?direct&300|}}|
-|{{:techtalk:ref:engmech:test_fit_cams_in_cam_cover_by_aswracing.jpg?direct&300|}}|
-|  Test fitting cams in the cam cover ((photo by aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1715966&page=3))  |
-|{{:techtalk:ref:engmech:test_fitting_cams_with_the_cam_cover_on_by_aswracing.jpg?direct&300|}}|
-|Test fitting cams with the cam cover installed ((photo by aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?t=1840595))|

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