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techtalk:ref:oil05h [2019/06/04 17:26]
techtalk:ref:oil05h [2019/08/17 18:45] (current)
hippysmack [norseXL's 1986 Engine Oiling Mods]
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 +[[:​techtalk:​menu|{{ ​ :​techtalk:​gototechnicalmenu.jpg|}}]]
 +====== REF: Oiling & Lubrication - Sub-05G ======
 +====== norseXL'​s 1986 Engine Oiling Mods ======
 +Article by norseXL of the XLFORUM ((http://​xlforum.net/​forums/​showthread.php?​t=1386341)) \\
  
 +Normally, when the oil pressure regulator opens to purge excess pressure from the filter pad, the oil is routed thru a hole in the pad and into the gearcase. \\
 +The regulator can open at various times and even get stuck in the open position while continuously dumping feed oil before it goes into the motor. \\
 +See also [[techtalk:​ref:​oil05e|86-90 Oil Filter Mount Mods]] in the Sportsterpedia. \\
 +
 +With this mod, you can render the affects of the pressure regulator inoperative while leaving the plunger and spring in place in the filter pad. 
 +Tapping the discharge hole is another way of getting the excess oil back to the tank without running it through the engine first. \\
 +The rear discharge hole was plugged and the side of the discharge hole was tapped with an 1/8" nipple. \\
 +A hole was drilled into the top of the mount behind the internal cavities for a hose to run from there straight to the oil tank cap. ((photo by norseXL of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=1458269&​page=2)) \\
 +
 +With the cases apart, the vent / splash holes to the cam chest were enlarged and ported. \\
 +
 +|  Oil pressure regulator blocked off. ((photo by norseXL of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=1386341)) ​ |  Vent holes widened (inside and outside views). ((photos by norseXL of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=1386341)) ​ ||
 +|{{:​techtalk:​ref:​oil:​86-90_oil_filter_mount_by_norsexl.jpg?​direct&​300|}}|{{:​techtalk:​ref:​oil:​widened_vent-splash_holes_by_norsexl.jpg?​direct&​300|}}|{{:​techtalk:​ref:​oil:​widened_vent-splash_holes_2_by_norsexl.jpg?​direct&​300|}}|
 +
 +The umbrella valve in the cam cover was removed and a larger hose (3/4") fitting was added to use a reed valve for crankcase breathing instead. \\
 +About a foot of 3/4" hose was run to a reed-valve outside the engine. \\
 +the theory is that the larger ID on the hose slows the air speed to keep oil mist from being flinging out. \\
 +
 +A windage tray was made with a 2mm thick aluminum plate to also act as a flywheel scraper. \\
 +The front part was bent toward the fly-wheels after the pic below was taken. ((norseXL of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=1833647)) \\
 +The bolts are secured with Loctite (2701). \\
 +See more on [[techtalk:​ref:​engmech01s|Windage Trays]] in the Sportsterpedia. \\
 +
 +|  Reed valve. ((photo by norseXL of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=1386341)) ​ |  Fitting replaced for larger 3/4" hose. ((photo by norseXL of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​p=4185293&​highlight=deimus#​post4185293)) ​ |  Homemade windage tray. ((photo by norseXL of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=1386341)) ​ |
 +|{{:​techtalk:​ref:​oil:​reed_valve_by_norsexl.jpg?​direct&​300|}}|{{:​techtalk:​ref:​engmech:​larger_hose_connection_from_cam_chest_vent_by_norsexl.jpg?​direct&​300|}}|{{:​techtalk:​ref:​oil:​homemade_windage_tray_by_norsexl.jpg?​direct&​300|}}|
 +
 +Cam box oil routing was also modified. \\
 +A line was tapped into the bottom of the case so the oil level doesn'​t rise above the castings for the bolts to flow to the scavenge hole at the rear of the crankcase. \\
 +Also an external drain was plumbed from the cam chest to the crankcase (under the windage-plate). \\
 +
 +|  Cam floor drain tube. ((photo by norseXL of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=1386341&​page=2)) ​ |  Lowering cam box drainage. ((photo by norseXL of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=1386341&​page=2)) ​ |
 +|{{:​techtalk:​ref:​oil:​lowering_oil_level_in_cam_box_floor_by_norsexl.jpg?​direct&​300|}}|{{:​techtalk:​ref:​oil:​external_cam_floor_drain_by_norsexl.jpg?​direct&​300|}}|
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 +[[:​techtalk:​menu|{{:​techtalk:​gototechnicalmenu.jpg|}}]]