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| techtalk:ih:engmech09b [2021/06/10 21:14] – [IH: Engine Mechanicals - Sub-09V] hippysmack | techtalk:ih:engmech09b [2023/12/27 21:16] (current) – hippysmack | ||
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| ====== IH: Engine Mechanicals - Sub-09B ====== | ====== IH: Engine Mechanicals - Sub-09B ====== | ||
| ====== Shimming Motor Mounts ====== | ====== Shimming Motor Mounts ====== | ||
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| - | ====== Shimming Top Mounts ====== | ||
| * The top mounts should be shimmed if they do not fit nice against the frame. | * The top mounts should be shimmed if they do not fit nice against the frame. | ||
| - | * Before tightening top mounts, check to make sure there is no space left between the mount and rocker box (or heads respectively). \\ Don't allow any of the mounts to be " | + | * Before tightening top mounts, check to make sure there is no space left between the mount and rocker box (or heads respectively). \\ Don't allow any of the mounts to be " |
| * Normally washers are used as shims although some have bought or made spacers from hollow sleeves. \\ Either way, the shims need to be flat on top and bottom to allow for even torque across them. \\ Store bought spacers have a habit of warpage or imperfections on the ends which may need to be straightened before using. \\ If the top or bottom of a shim is not true flat, any high/low spots can turn during vibration and end up loosening the motor mount assembly. | * Normally washers are used as shims although some have bought or made spacers from hollow sleeves. \\ Either way, the shims need to be flat on top and bottom to allow for even torque across them. \\ Store bought spacers have a habit of warpage or imperfections on the ends which may need to be straightened before using. \\ If the top or bottom of a shim is not true flat, any high/low spots can turn during vibration and end up loosening the motor mount assembly. | ||
| * Use hardened flat washers (soft washers will crush or taco and not hold correctly) over slotted holes and grade 8 nylock nuts. \\ Use hardened washers against aluminum also. Pyramid stack hardened washers for the big single upper mount bolt. \\ Use a fender washer or make a large diameter shim if needed to close any gap (fine thread grade 8 bolt & nut). \\ [[techtalk: | * Use hardened flat washers (soft washers will crush or taco and not hold correctly) over slotted holes and grade 8 nylock nuts. \\ Use hardened washers against aluminum also. Pyramid stack hardened washers for the big single upper mount bolt. \\ Use a fender washer or make a large diameter shim if needed to close any gap (fine thread grade 8 bolt & nut). \\ [[techtalk: | ||
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| * 1/16" washers (6702) suggested for 78-81 models and 5/64" washers (6702) suggested for 82-85 models. | * 1/16" washers (6702) suggested for 78-81 models and 5/64" washers (6702) suggested for 82-85 models. | ||
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