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Oil Sending Unit Leak/Spray

Discussion in 'Engine and Drivetrain/Mechanical' started by Patrick Stapler, Jan 21, 2018.

  1. Patrick Stapler

    Patrick Stapler Active Member

    For all you neigh sayers...you were right. The RTV didn't hold. Well it did...for a while. Started the car and allowed it to warm up. Watching, watching...raised the RPM several times, 2000, 2500, 3000, 3500, 4000...no leaks. Yeah! Let it idle a few minutes...same progression...no leaks. Yeah! Turned it off and let it sit for 10-15 minutes. Started it back up and ran it up the through the RPMs again...LEAK [​IMG][​IMG][​IMG]...[​IMG]

    So tomorrow night I will be removing the sender AND extension and performing exhaustive tests on the two to determine which is at fault. Will keep you posted.
     
  2. Horseplay

    Horseplay Well-Known Member

    Naysayer. I've been called worse. I do like the horse angle you put on it. (neigh) lol
     
  3. Patrick Stapler

    Patrick Stapler Active Member

    I thought you would get a "kick" out of that...
     
  4. msell66

    msell66 Burning Fossil Fuels Donator

    Today for instance.
     
  5. Boom

    Boom Active Member

    Have we ruled out using JB weld? lol


    I hope nobody would actually use that to fix a leak on a firetruck's brake line.
     
  6. msell66

    msell66 Burning Fossil Fuels Donator

    It's an occupational hazard for him.
     
  7. msell66

    msell66 Burning Fossil Fuels Donator

    Glad you realized we were correct.
     
  8. Patrick Stapler

    Patrick Stapler Active Member

    I never questioned that...I was however hoping to not have to take it apart again. Oh well.
     
  9. Patrick Stapler

    Patrick Stapler Active Member

    What I thought I was seeing while laying under the car is not. Tonight I removed the sending unit and attached my Oil pressure gauge. No leaks. Warned everything up started increasing RPM while looking directly at the connection. No Leak but Oil started spewing. Where from you ask...NOT the block connection and NOT the gauge connections. From the dang fuel pump arm pin. Watch and tell me if I’m wrong.

     
  10. Boom

    Boom Active Member

    That does look like its coming from the pump, been awhile since I've used a mechanical pump so I'm a little fuzzy on the various holes and pins. I hope that isn't a sign showing that the pressure is going to prematurely leak out the various seals and gaskets.

    I still think you have crazy high oil pressure, mine is like 35-40. Never really moves too much from that.
     
  11. Patrick Stapler

    Patrick Stapler Active Member

    Varied pressure at 65psi rock solid.
     
  12. msell66

    msell66 Burning Fossil Fuels Donator

    Nothing wrong with that oil pressure.

    I am kinda laughing though.
     
  13. Patrick Stapler

    Patrick Stapler Active Member

  14. msell66

    msell66 Burning Fossil Fuels Donator

    You were really adamant that it was nothing BUT the extension/sender connection.
     
  15. Patrick Stapler

    Patrick Stapler Active Member

    I know right...I'm an ass. However, I couldn't see the top of the fuel pump...or at at least the pin where it appears to be leaking. When I removed the sending unit and installed the gauge hose I could clearly see the issue. So it was blowing up onto the bottom of the sending unit and dripping down onto everything around it. My bad...
     
  16. msell66

    msell66 Burning Fossil Fuels Donator

    Hey, at least now you know what the problem is!
     
  17. Horseplay

    Horseplay Well-Known Member

    HEY! I'm ass around here. You go find yourself another name.
     
    Patrick Stapler and msell66 like this.
  18. 3175375

    3175375 Well-Known Member

    Glad you found the culprit. Change fuel pump? you need to at least pull it and see what's going on. IIRC, it is being splashed up into the roll pin that the pump arm is pivoted on.
     
  19. Patrick Stapler

    Patrick Stapler Active Member

    Changing tomorrow.
     
  20. Patrick Stapler

    Patrick Stapler Active Member

    Fixed...BTW, two wraps of teflon tape on the oil sending unit threads works AWESOME for stopping leaks...especially when the fuel pump is blowing oil on it.
     

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