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techtalk:ih:engmech07a [2019/12/06 02:07] hippysmack [Timing the Breather Valve] |
techtalk:ih:engmech07a [2020/09/19 00:16] hippysmack [Timing the Breather Valve] |
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| It is not uncommon to have the DOT slightly to the left just entering the notch of the pump. ((Monte03 of the XLFORUM http://xlforum.net/forums/showthread.php?t=170686&page=2)) \\ | It is not uncommon to have the DOT slightly to the left just entering the notch of the pump. ((Monte03 of the XLFORUM http://xlforum.net/forums/showthread.php?t=170686&page=2)) \\ | ||
| - | Then reinstall the pinion gear. It should have one larger spline to engage the shaft and it can only go on one way and have the line facing out. ((chevelle of the XLFORUM http://xlforum.net/forums/showthread.php?t=170686&page=3)) \\ | + | **Then reinstall the pinion gear**. It should have one larger spline to engage the shaft and it can only go on one way and have the line facing out. ((chevelle of the XLFORUM http://xlforum.net/forums/showthread.php?t=170686&page=3)) \\ |
| It's a light press fit onto the pinion shaft. \\ | It's a light press fit onto the pinion shaft. \\ | ||
| You can heat the gear up in a grill, oven or with a propane torch just enough to make it expand enough to slide it back on the pinion shaft. \\ | You can heat the gear up in a grill, oven or with a propane torch just enough to make it expand enough to slide it back on the pinion shaft. \\ | ||
| It should not be heated to 'red hot' but just enough to allow it to expand some. \\ | It should not be heated to 'red hot' but just enough to allow it to expand some. \\ | ||
| + | |||
| + | {{:techtalk:ih:engmech:pre-77_installing_pinion_gear_by_canadiantux.jpg?direct&300|}} | ||
| + | Pinion gear should be installed onto shaft so the outer face of the gear is 5/16" outboard of the gasket surface. ((needspeed of the XLFORUM http://xlforum.net/forums/showthread.php?p=5792984#post5792984)) ((photo by CanadianTux of the XLFORUM http://xlforum.net/forums/showthread.php?t=1708831&page=11)) \\ | ||
| + | In that position the oil pump drive gear has a lot of end play between the shaft shoulder and the back of the pinion gear as shown in your picture. \\ | ||
| + | When the engine runs the drive gear is thrust against the back of the pinion gear. \\ | ||
| + | So if you time the pump with the gear in the opposite direction pushed against the shaft shoulder it's very easy to get the lineup off a tooth. \\ | ||
| + | If you are going to pull the pinion gear off you'll need to determine the position where the drive gear will end up with the pinion gear installed. \\ | ||
| + | Measuring from the gasket surface the length of the gear minus 5/16" should do it. \\ | ||
| **Note**: | **Note**: | ||
| Once the breather valve is correctly timed, the position of the flywheel and breather valve timing marks can be disregarded when installing timing gears (cams). \\ | Once the breather valve is correctly timed, the position of the flywheel and breather valve timing marks can be disregarded when installing timing gears (cams). \\ | ||
| - | {{:techtalk:ih:engmech:timing_the_breather_valve_1_by_canadiantux_annotated_by_hippysmack.jpg?direct&300|}} ((photo by Canadian Tux of the XLFORUM )) {{:techtalk:ih:engmech:ih_oil_pump_timing_by_hotrods316.jpg?direct&300|}} ((photo by hotrods316 of the XLFORUM http://xlforum.net/forums/showthread.php?t=170686&page=3)) {{:techtalk:ih:engmech:ih_oil_pump_timing_by_cbellamore.png?direct&300|}} ((photo by cbellamore of the XLFORUM annotated by Hippysmack)) \\ | + | {{:techtalk:ih:engmech:timing_the_breather_valve_1_by_canadiantux_annotated_by_hippysmack.jpg?direct&300|}} ((photo by Canadian Tux of the XLFORUM)) {{:techtalk:ih:engmech:ih_oil_pump_timing_by_hotrods316.jpg?direct&300|}} ((photo by hotrods316 of the XLFORUM http://xlforum.net/forums/showthread.php?t=170686&page=3)) {{:techtalk:ih:engmech:ih_oil_pump_timing_by_cbellamore.png?direct&300|}} ((photo by cbellamore of the XLFORUM annotated by Hippysmack)) \\ |
