RRC 3.9 not pumping any oil
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Thread: RRC 3.9 not pumping any oil

  1. #1
    FRESHMAN ROVER
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    January 24th, 2017
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    RRC 3.9 not pumping any oil

    I have a question on my RRC. Its a 92 v8 3.9 and unfortunately it has had to sit for about a year in a garage due to me starting to work on it and then other life events happening preventing me from putting it back together. Anyways I'm trying to get it back up and going so I can finish it up but for some reason I'm not getting any oil to the top end of the engine and I'm not sure why.
    I have tried packing the pump with Vaseline,
    I have taken the top oil cooler line off and put a vacuum to it,
    I have taken the distributor off and made a tool to spin the pump with a drill,
    I have poured oil down the cooler pipes,
    I have replaced the pump and gears with ones from a parts car,
    and I have taken the oil pan off and cleaned the pick up tube and put a new gasket on both the tube and pump.
    Everything I try doesn't work and I still cant get it to pump oil, even with the cooler line undone i dont get any oil out of it.
    Any help or suggestions would be awesome,
    Thank You!

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  3. #2
    FRESHMAN ROVER HDvideo4K's Avatar
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    Re: RRC 3.9 not pumping any oil

    The pump gear to timing chain housing tolerance is fairly critical. Were the oil pump gears or timing case changed? I had the same issue until I found the right gear/housing combo. A new housing requires a new gear set. A second hand housing is a nightmare. After three years since the re-build and in freezing conditions, it might take 30 seconds before the light goes out but it's instant when the motor is hot. (I put that down to tolerances changing due to temperature/expansion/contraction...)

    PS: I've tried every oil and filter combination under the sun but good ole 100% mineral Shell 15W-40 plus a genuine Land Rover filter (with non return valve) still works best.
    Craig Marshall: Film Maker and Tour Operator



    2005 Range Rover L322 HSE 4.4 Litre 5 Speed Auto
    1993 Range Rover 'Classic' Vogue SE 4.6 Litre 4 1/2 Speed Auto (sold)
    2006 RR 'Sport' TDV6 (commercial 4x4 tour vehicle until sold)
    2002 RR L322 HSE TD6 (commercial 4x4 tour vehicle until traded on above)
    2000 Defender Td5 110 Station wagon (commercial 4x4 tour vehicle until traded on above)
    1998 Defender Tdi 130 Dual Cab (traded on above)
    1964 Series IIa SWB (still a mate's daily drive)

  4. #3
    Premium Member crazyguy's Avatar
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    Re: RRC 3.9 not pumping any oil

    Did you change the timing cover gasket? That was the problem with mine. there are two very similar ones, only the correct one has one small extra hole for oil. My guess is you've got the wrong one.
    1990 RRC. 4.2 wearing green.

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  6. #4
    FRESHMAN ROVER
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    Re: RRC 3.9 not pumping any oil

    You could also check the oil pressure relief valve to make sure it's not stuck open.

  7. #5
    SOPHOMORE ROVER
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    Re: RRC 3.9 not pumping any oil

    it is in the repair manual, pack the pump gears with vaseline or grease.

  8. #6
    FRESHMAN ROVER
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    There were some wear marks on it but nothing that I would say is excessive. I took the gears and the oil pump assembly off of a parts car that I have but I did not transfer the timing cover with it.

  9. #7
    FRESHMAN ROVER
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    And no I have not taking the timing cover off but I'm not sure if the guy before me did or not but I'm pretty sure I had oil pressure when I first bought it

  10. #8
    Premium Member crazyguy's Avatar
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    Re: RRC 3.9 not pumping any oil

    Quote Originally Posted by 95classiclwb View Post
    it is in the repair manual, pack the pump gears with vaseline or grease.
    he said he did that in the first post.
    1990 RRC. 4.2 wearing green.

  11. #9
    FRESHMAN ROVER HDvideo4K's Avatar
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    Re: RRC 3.9 not pumping any oil

    I suspect you'll need to take the timing cover off the parts car to mate with it's original gear set. I'd bought new gears for the second hand timing case but we could not get pressure after trying ever trick in the book. In desperation, we put my old gears in and it eventually got pressure. As previously mentioned, the non-return valve could also be stuck.
    Craig Marshall: Film Maker and Tour Operator



    2005 Range Rover L322 HSE 4.4 Litre 5 Speed Auto
    1993 Range Rover 'Classic' Vogue SE 4.6 Litre 4 1/2 Speed Auto (sold)
    2006 RR 'Sport' TDV6 (commercial 4x4 tour vehicle until sold)
    2002 RR L322 HSE TD6 (commercial 4x4 tour vehicle until traded on above)
    2000 Defender Td5 110 Station wagon (commercial 4x4 tour vehicle until traded on above)
    1998 Defender Tdi 130 Dual Cab (traded on above)
    1964 Series IIa SWB (still a mate's daily drive)

  12. #10
    FRESHMAN ROVER
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    Re: RRC 3.9 not pumping any oil

    Quote Originally Posted by crazyguy View Post
    Did you change the timing cover gasket? That was the problem with mine. there are two very similar ones, only the correct one has one small extra hole for oil. My guess is you've got the wrong one.
    I wonder if that's the problem with mine... I still haven't investigated it but that seems like the most likely explanation.
    Paul

    1993 Range Rover LWB

  13. #11
    SOPHOMORE ROVER
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    Re: RRC 3.9 not pumping any oil

    Quote Originally Posted by crazyguy View Post
    he said he did that in the first post.
    correct, sorry typed before my brain could process...lol.

  14. #12
    FRESHMAN ROVER
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    I think i will try taking the timing cover off the parts truck and see if that will work. Is the timing cover for the 4.2 motor the same for the 3.9? My parts truck has a 4.2 in it (which i plan to swap at some point). Whats this thing about the gasket for the timing cover being a bit different? Im going to order a new one so i want to make sure i get the right one.

  15. #13
    SOPHOMORE ROVER
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    Re: RRC 3.9 not pumping any oil

    as long as they are equal belt drives, that is either both motors serpentine or both motors multi vee belt.
    if not equal, the cover will work for testing purposes but you won't be able to drive the ancillaries unless you do the component swap over, on a serpentine belt the water pump rotates opposite and it is a totally different animal than vee driven.

    one detail many of us missed, the distributor drives the oil pump shaft. Does the dizzy have the little wobbly piece at bottom of gear? if not them you may not be driving the pump.
    other than that, you may need to retrace your work for something missed.

  16. #14
    FRESHMAN ROVER
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    I am 99% sure that they are both V belts but I will double check. And I did pull the distributor to check to make sure that everything was there.

  17. #15
    SOPHOMORE ROVER
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    Re: RRC 3.9 not pumping any oil

    oh darn the mystery only deepens, could very well be the engine bearings are so worn they just don't build pressure. normally the packing of the gears with grease does the full trick, maybe so much sludge in the motor has cloged the oil gallery.
    get a hold of Dan at D & D fabrications aka aluminumv8.com he does lots of rover engines.
    something is definitively amiss but what is it? the million dollar question.
    good luck.

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