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techtalk:evo:engmech04j [2021/07/08 00:03] hippysmack [Ream and Lap the New Bushing] |
techtalk:evo:engmech04j [2021/07/08 00:15] hippysmack [Check the shaft in bushing clearance] |
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| - Measure and record the I.D of the rocker arm bushing with a telescoping bore gauge and caliper. | - Measure and record the I.D of the rocker arm bushing with a telescoping bore gauge and caliper. | ||
| - Subtract the shaft dia. from the bushing I.D. and match that number against the wear limit specs. | - Subtract the shaft dia. from the bushing I.D. and match that number against the wear limit specs. | ||
| - | * If the bushing is at or past the service wear limit, proceed to "replacing the bushings" as in below. | + | * If the bushing is within service limit, install the rocker arm as is. |
| + | * If the bushing is at or past the service wear limit: | ||
| + | * Proceed to [[techtalk:evo:engmech04j#rocker_arm_bushing_replacement|Replacing the Rocker Arm Bushings]] below. | ||
| + | * If you choose not to replace the bushing, it is advised to replace the entire rocker arm. \\ New rocker arms come with new pre-sized bushings. | ||
| |{{:techtalk:evo:engmech:mic_the_rocker_arm_shaft_2_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:engmech:mic_the_rocker_arm_bushing_bore_1_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:engmech:mic_the_rocker_arm_bushing_bore_2_by_hippysmack.jpg?direct&300|}}| | |{{:techtalk:evo:engmech:mic_the_rocker_arm_shaft_2_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:engmech:mic_the_rocker_arm_bushing_bore_1_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:engmech:mic_the_rocker_arm_bushing_bore_2_by_hippysmack.jpg?direct&300|}}| | ||
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| |{{:techtalk:evo:engmech:rocker_arm_inspection_1_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:engmech:rocker_arm_inspection_2_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:engmech:rocker_arm_inspection_3_by_hippysmack.jpg?direct&300|}}| | |{{:techtalk:evo:engmech:rocker_arm_inspection_1_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:engmech:rocker_arm_inspection_2_by_hippysmack.jpg?direct&300|}}|{{:techtalk:evo:engmech:rocker_arm_inspection_3_by_hippysmack.jpg?direct&300|}}| | ||
| ====== Rocker Arm Bushing Replacement ====== | ====== Rocker Arm Bushing Replacement ====== | ||
| + | This procedure is ONLY needed IF you want to replace the bushings but not the rocker arms. \\ | ||
| + | New rocker arms come with new bushings that have already been properly sized for the rocker arm shafts. \\ | ||
| + | |||
| A helpful suggestion is to mic the bushings closely and several times to be sure you need to before replacing them. ((Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2072192)) \\ | A helpful suggestion is to mic the bushings closely and several times to be sure you need to before replacing them. ((Hippysmack of the XLFORUM http://xlforum.net/forums/showthread.php?t=2072192)) \\ | ||
| If the rocker arm pads or the pushrod cups are worn badly, it'd probably be best to just replace the arms instead. \\ | If the rocker arm pads or the pushrod cups are worn badly, it'd probably be best to just replace the arms instead. \\ | ||
