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| techtalk:ih:engmech01g [2025/08/01 18:21] – [Cam/Gearcase Cover Removal] hippysmack | techtalk:ih:engmech01g [2025/08/01 19:40] (current) – [Inspection] hippysmack |
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| ====== Inspection ====== | ====== Inspection ====== |
| * Inspect the cam bushings. [[techtalk:ih:engmech02c#installing_pinning_and_reaming_cam_bushings|Click Here]] to view the page in Sportsterpedia on Installing, Pinning and Reaming Cam Bushings. | * **Inspect the cam bushings**. Check the clearances per the service manual and replace any out of service bushings. Also check for scoring or scratches. [[techtalk:ref:tools107#cam_bushing_measuring_removal_installation_tools|Click Here]] for Cam Bushing Measuring / Removal / Installation Tools. [[techtalk:ih:engmech02c#installing_pinning_and_reaming_cam_bushings|Click Here]] to view the page in Sportsterpedia on Installing, Pinning and Reaming Cam Bushings. |
| * Inspect the point cover/ignition seal in the cover. | * **Inspect the point cover/ignition seal** in the cover (see below). |
| * __Look for ID leaks__; a marred cam journal, seal lip not getting up on the full journal diameter or a missing dog bone thrust plate on far side of cam. ((Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/128889-points-cover-seal-leak/page2?t=1341815&page=2)) Also look for a blocked drain hole (putting the seal in too far can do this). The seal goes flush to outer surface. A new bushing too long hitting the seal lip when the seal was installed would do it also. Same as the seal bore not concentric to the cam bushing (holds seal off center). | * Look for ID leaks; a marred cam journal, seal lip not getting up on the full journal diameter or a missing dog bone thrust plate on far side of cam. ((Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/128889-points-cover-seal-leak/page2?t=1341815&page=2)) Also look for a blocked drain hole (putting the seal in too far can do this). The seal goes flush to outer surface. A new bushing too long hitting the seal lip when the seal was installed would do it also. Same as the seal bore not concentric to the cam bushing (holds seal off center). |
| * __Look for OD leaks__; the seal bore nicked, tearing the seal OD when installing it. | * Look for OD leaks; the seal bore nicked, tearing the seal OD when installing it. |
| * __Look for scratches, gouges or wear marks on the cam shaft__ where the seal seats. If there are any, they need to be removed or the shaft changed. Also check if there are any gouges or cracks around the outside diameter of where the seal fits in (bore). These can be put there during seal removal and let oil seep out around the outside of the seal. They can usually be scraped or filed back flat. You can make a scraper by grinding the teeth off the end of a three-sided file. | * Look for scratches, gouges or wear marks on the cam shaft where the seal seats. If there are any, they need to be removed or the shaft changed. Also check if there are any gouges or cracks around the outside diameter of where the seal fits in (bore). These can be put there during seal removal and let oil seep out around the outside of the seal. They can usually be scraped or filed back flat. You can make a scraper by grinding the teeth off the end of a three-sided file. |
| | * **Inspect the breather vent/bushing in the cover** for damage/debris/obstruction. [[techtalk:ih:engmech07#crankcase_ventilation|Click Here]] to go to the IH Crankcase Ventilation page in Sportsterpedia for pics and info for different year covers and breathing systems. The breathing passages can get stopped up, especially if you have sand blasted the cover, but it can also stop up from old oil on extended shutdowns. |
| ====== Preparation ====== | ====== Preparation ====== |
| ===== Breaker Points/Nosecone Ignition Seal ===== | ===== Breaker Points/Nosecone Ignition Seal ===== |
