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techtalk:evo:engmech04b [2019/05/05 01:35] hippysmack [Stabilizing Noisy Rocker Arm Shafts] |
techtalk:evo:engmech04b [2020/06/05 20:54] hippysmack [Clearancing the Rocker Boxes] |
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If problems are found, below are some examples of how those have been addressed. \\ | If problems are found, below are some examples of how those have been addressed. \\ | ||
====== Clearancing the Rocker Boxes ====== | ====== Clearancing the Rocker Boxes ====== | ||
+ | Rocker shaft to Rocker box clearance for all XL’s is 0.0007” to 0.0022”. ((2000 MMI Documents)) \\ | ||
+ | |||
High lift cams or changes in the valve springs can cause contact in the rocker box. ((Scuba10jdl of the XLFORUM http://xlforum.net/forums/showthread.php?p=5601873&highlight=rocker+wear#post5601873)) \\ | High lift cams or changes in the valve springs can cause contact in the rocker box. ((Scuba10jdl of the XLFORUM http://xlforum.net/forums/showthread.php?p=5601873&highlight=rocker+wear#post5601873)) \\ | ||
When you have high lift cams, as the rockers push your valves open they are also putting a sideways pressure on the valve stems. ((mikeLI_77 of the XLFORUM http://xlforum.net/forums/showthread.php?p=5601873&highlight=rocker+wear#post5601873)) \\ | When you have high lift cams, as the rockers push your valves open they are also putting a sideways pressure on the valve stems. ((mikeLI_77 of the XLFORUM http://xlforum.net/forums/showthread.php?p=5601873&highlight=rocker+wear#post5601873)) \\ | ||
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|After clearancing. ((photo by aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?p=5489961))|Top view ((photo by isiahstites of the XLFORUM http://xlforum.net/forums/showthread.php?t=51598&page=10))| | |After clearancing. ((photo by aswracing of the XLFORUM http://xlforum.net/forums/showthread.php?p=5489961))|Top view ((photo by isiahstites of the XLFORUM http://xlforum.net/forums/showthread.php?t=51598&page=10))| | ||
|{{:techtalk:evo:engmech:rocker_box_clearance_2_by_aswracing.jpg?direct&200|}}|{{:techtalk:evo:engmech:rocker_box_clearance_2_by_isiahstites.jpg?direct&300|}}| | |{{:techtalk:evo:engmech:rocker_box_clearance_2_by_aswracing.jpg?direct&200|}}|{{:techtalk:evo:engmech:rocker_box_clearance_2_by_isiahstites.jpg?direct&300|}}| | ||
+ | |||
+ | | Another rocker clearancing project. ((photos by cjburr of the XLFORUM http://xlforum.net/forums/showthread.php?t=44421&page=13)) ||| | ||
+ | |{{:techtalk:evo:engmech:clearancing_rocker_box_2_by_cjburr.jpg?direct&300|}}|{{:techtalk:evo:engmech:clearancing_rocker_box_1_by_cjburr.jpg?direct&300|}}|{{:techtalk:evo:engmech:clearancing_rocker_box_3_by_cjburr.jpg?direct&300|}}| | ||
===== Arm Clearance ===== | ===== Arm Clearance ===== |