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techtalk:ih:oil01 [2019/06/27 02:53] hippysmack [Low Oil Pressure] |
techtalk:ih:oil01 [2019/06/27 03:45] hippysmack [Low Oil Pressure] |
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| * No oil to the top end: | * No oil to the top end: | ||
| * Make sure the rubber grommets on each end of the stock rocker feed lines are not partially plugging the ends of the rocker feed lines. \\ Then remove the allen-hex rocker spindle plug from the front exhaust rocker spindle, at the right-hand side of the rocker box. \\ Oil should come out there if you have flow with the engine running. ((Hopper of the XLFORUM http://xlforum.net/forums/showthread.php?t=831522)) | * Make sure the rubber grommets on each end of the stock rocker feed lines are not partially plugging the ends of the rocker feed lines. \\ Then remove the allen-hex rocker spindle plug from the front exhaust rocker spindle, at the right-hand side of the rocker box. \\ Oil should come out there if you have flow with the engine running. ((Hopper of the XLFORUM http://xlforum.net/forums/showthread.php?t=831522)) | ||
| + | * You can loosen or remove the 1/8" NPT pipe plug from the right side, front corner of each rocker cover. \\ With the engine at idle, you should get a small amount of oil plopping out (not shooting out like a fire hose). ((IronMick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1625333&page=3)) | ||
| + | * You can also use the same 1/8" plug hole to install a barb and clear hose to visually inspect for oil flow. \\ {{:techtalk:ih:oil:checking_for_oil_flow_at_the_rocker_box_by_chevelle.jpg?direct&300|}} ((photo by chevelle of the XLFORUM http://xlforum.net/forums/showthread.php?t=1625333&page=2)) | ||
| * Check the pinion shaft to bushing clearance to the specs in the FSM. \\ If the fit is overly loose, this condition will not allow oil to be transferred up the lines at low speed. \\ Oil will just be bled out into the cam chest until RPM sends and over-runs more oil than can be spilled at the bushing. | * Check the pinion shaft to bushing clearance to the specs in the FSM. \\ If the fit is overly loose, this condition will not allow oil to be transferred up the lines at low speed. \\ Oil will just be bled out into the cam chest until RPM sends and over-runs more oil than can be spilled at the bushing. | ||
| * If the fit is out of spec, you'll need to replace the bushing. ((Hopper of the XLFORUM http://xlforum.net/forums/showthread.php?t=831522&highlight=crankcase+pressure)) | * If the fit is out of spec, you'll need to replace the bushing. ((Hopper of the XLFORUM http://xlforum.net/forums/showthread.php?t=831522&highlight=crankcase+pressure)) | ||
| Line 246: | Line 248: | ||
| * 76< pumps: | * 76< pumps: | ||
| * If the pump shaft seal is blown, then the scavenge pump will continue to function because the pump pressure is higher than scavenge pressure. ((XLFREAK of the XLFORUM http://xlforum.net/forums/showthread.php?t=831522&highlight=crankcase+pressure&page=4)) \\ So oil will flow from your pump down the shaft into the scavenge pump and goes back to the tank from there. \\ It's possible the pump got some trash in it and got scarred and now just doesn't pump very well. \\ It's a nasty job getting the thing off, made doubly nasty if you don't find anything wrong. \\ If you have an oil flow problem from the pump, you can either rebuild it or put a new one on just to make sure that this is not the problem. \\ If it isn't the pump, then start looking for leaks. | * If the pump shaft seal is blown, then the scavenge pump will continue to function because the pump pressure is higher than scavenge pressure. ((XLFREAK of the XLFORUM http://xlforum.net/forums/showthread.php?t=831522&highlight=crankcase+pressure&page=4)) \\ So oil will flow from your pump down the shaft into the scavenge pump and goes back to the tank from there. \\ It's possible the pump got some trash in it and got scarred and now just doesn't pump very well. \\ It's a nasty job getting the thing off, made doubly nasty if you don't find anything wrong. \\ If you have an oil flow problem from the pump, you can either rebuild it or put a new one on just to make sure that this is not the problem. \\ If it isn't the pump, then start looking for leaks. | ||
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| **If oil is not returning to the oil tank**: \\ | **If oil is not returning to the oil tank**: \\ | ||
