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Pre lube problems

Discussion in 'LS1, LS2, LS6, LT1, SBC Turbo and other GM Specfic Turbo Tech' started by jblystone1, Sep 28, 2021.

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  1. jblystone1

    Joined:
    Mar 20, 2013
    Tried several times to pre lube ls 6.0, nothing coming up push rod tubes or at oil sending unit hole, fresh rebuild. Any ideas ?
     
    jblystone1, Sep 28, 2021
    #1

  2. Disney Lincoln

    Joined:
    Feb 14, 2003
    What is your method? Pumping into the port on the left side of the engine?
     
    Disney Lincoln, Sep 28, 2021
    #2

  3. jblystone1

    Joined:
    Mar 20, 2013
    Yes, at timing chain cover, also using melling pump, don't know if it makes a difference
     
    jblystone1, Sep 28, 2021
    #3

  4. Disney Lincoln

    Joined:
    Feb 14, 2003
    Did you replace the bar bell in the oil galley?
     
    Disney Lincoln, Sep 28, 2021
    #4

  5. jblystone1

    Joined:
    Mar 20, 2013
    Yup, brand new. All new bearings, if the guy that put in the cam bearings didn't line up the holes could that cause this issue?
     
    jblystone1, Sep 29, 2021
    #5

  6. Disney Lincoln

    Joined:
    Feb 14, 2003
    No, it just wouldn't feed the cam journals. How much have you put into it so far?
     
    Disney Lincoln, Sep 29, 2021
    #6

  7. jblystone1

    Joined:
    Mar 20, 2013
    About 500, everything else can be taken off and reused if need be
     
    jblystone1, Sep 30, 2021
    #7

  8. Disney Lincoln

    Joined:
    Feb 14, 2003
    I meant oil. How much oil have you pushed into it?
     
    Disney Lincoln, Sep 30, 2021
    #8

  9. jblystone1

    Joined:
    Mar 20, 2013
    Started with 5, then 6, then 7 qts.
     
    jblystone1, Sep 30, 2021
    #9

  10. Mnlx

    Joined:
    Sep 20, 2009
    Maybe pull the pan, and look for a major leak? Probably have to cap the filter feed. Are you using a pan with the AFM valve? What gen block?
     
    Last edited: Oct 1, 2021
    Mnlx, Oct 1, 2021
    #10

  11. jblystone1

    Joined:
    Mar 20, 2013
    02 gen 3
     
    jblystone1, Oct 1, 2021
    #11

  12. Disney Lincoln

    Joined:
    Feb 14, 2003
    THe only explanation I can think of would be either it's all going back through the oil pump, in which case the oil pump is bad. Or, it's not getting beyond the filter, which would be possible if the barbell is installed too far. Are you getting oil in the filter?

    Here's a good overview.
     
    Disney Lincoln, Oct 1, 2021
    #12

  13. jblystone1

    Joined:
    Mar 20, 2013
     
    jblystone1, Oct 1, 2021
    #13

  14. jblystone1

    Joined:
    Mar 20, 2013
    Has a brand new high pressure melling oil pump, never thought about the barbell tho. What is the proper distance for the barbell?
     
    jblystone1, Oct 1, 2021
    #14

  15. Mnlx

    Joined:
    Sep 20, 2009
    I don't believe it can go in too far. It should be flush with the rear of the block.
     
    Mnlx, Oct 1, 2021
    #15

  16. jblystone1

    Joined:
    Mar 20, 2013
    No oil to the filter
     
    jblystone1, Oct 2, 2021
    #16

  17. jblystone1

    Joined:
    Mar 20, 2013
    Sometime today (Sat.) I'll spin the motor upside down on the stand and pull the pan, check the o ring on pick up tube etc.
     
    jblystone1, Oct 2, 2021
    #17

  18. Disney Lincoln

    Joined:
    Feb 14, 2003
    Been a minute, but I was thinking it could be pushed in too far. Would explain his issue here.
    Either way, there's a blockage between the charge port and filter which is otherwise a straight line.
     
    Disney Lincoln, Oct 2, 2021
    #18

  19. jblystone1

    Joined:
    Mar 20, 2013
    Spun engine upside down pulled pan pushed 2quarts thru it and nothing came out of oil filter hole or rocker holes, so I'll pull the rear cover but iirc the barbell did fit flush. Pull it back out and see if there's some kind of blockage,if not it's going to get tarped in the corner and I'll move onto trans, rear, roll cage etc.
     
    jblystone1, Oct 3, 2021
    #19

  20. jblystone1

    Joined:
    Mar 20, 2013
    Just an update from oct.: Pre oiling ls,no pressure. After having block hot tanked I failed to replace soft plug under cam cover next to where pre oil fitting is ,allowing oil to go straight from pump to oil pan
     
    jblystone1, Nov 29, 2021
    #20
    Disney Lincoln and tbird like this.
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