Differences

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--- techtalk:ih:oil01 [2019/06/26 04:12]
hippysmack [Lifter Oiling]
+++ techtalk:ih:oil01 [2019/06/27 03:36]
hippysmack [Low Oil Pressure]
@@ Line 238: / Line 238: @@
   * The oil check valve could be stuck closed.
   * No oil to the top end:
-    * Check the pinion shaft to bushing clearance to the specs in the FSM.
+    * 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))
-    * If the fit is overly loose, this condition will not allow oil to be transferred up the lines at low speed.
+    * You can also use that same 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))
-    * 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 and line ream using a jig.
+      * 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))
-    * On 76< motors, it's best to eliminate that possibility before spending time and money yanking the engine out of the frame and inspecting the oil pump. \\ (and before spending money getting a new pinion bushing reamed with the special tooling etc.) ((Hopper of the XLFORUM http://xlforum.net/forums/showthread.php?t=831522&highlight=crankcase+pressure&page=2))
+      * Then line ream it using a special reamer through an old right-hand crankcase half to use to guide to get it in square.
-    * Also 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.
+     * On 76< motors, it's best to eliminate that possibility before spending time and money yanking the engine out of the frame and inspecting the oil pump. \\ (and before spending money getting a new pinion bushing reamed with the special tooling etc.) ((Hopper of the XLFORUM http://xlforum.net/forums/showthread.php?t=831522&highlight=crankcase+pressure&page=2))
   * The oil pump could be weak or malfunctioning.
   * 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 oil is not returning to the oil tank**: \\
@@ Line 367: / Line 365: @@
 ====== Top End Oiling ======
 ===== Cam Cover Oiling =====
+The oil going up to the top end not only passes by the bushing in the cam chest, but also is fed to and from the cam cover and through the cam cover gasket. ((XLFREAK of the XLFORUM http://xlforum.net/forums/showthread.php?t=831522&highlight=crankcase+pressure&page=2)) \\
+It is possible for the gasket to blow out and seal up the oil galley feed passages. \\
+Also if silicon was used on the cover, it is possible for that to break loose and stop up the passages. \\
+You can take the cover off and run a tap down all the threaded holes to clear out any obstructions. \\
+Also check that the face of the cover and case are not marred by some big scratch or dent. \\
+To get old silicone out of bolt holes, you can use an inflation needle for footballs/basketballs/soccerballs. ((rivethog of the XLFORUM http://xlforum.net/forums/showthread.php?t=831522&highlight=crankcase+pressure&page=2)) \\
+Cut the tip off of it then screw it into the end of an air blowgun. \\
+It's narrow enough that it doesn't block debris from getting out of the hole. \\
 |Oil path of 85 style cam cover ((photo by billeuze of the XLFORUM http://xlforum.net/forums/showthread.php?t=1103082))|
 |{{:techtalk:ih:oil:85_cam_cover_1_by_billeuze_annotated_by_hippysmack.jpg?direct&300|}}|

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