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Oil sending unit pipe leaking

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by scavenger, Dec 14, 2002.

  1. scavenger

    scavenger 1/2 ton status

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    Hi,
    I need help on trying to tighten the brass colored pipe at the rear of the block that the oil sending units are attached to. I have been wondering why I smell burned oil shortly after start up and discovered that this brass colored pipe is loose, and I can't tighten it enough to keep it from leaking because the sending units hit up against something preventing it from turning. I think I am going to have to remove the sending units, tighten the pipe, then re-connect the sending units. The problem is I can't get at this stuff because of other things in the way. Any way to get at the sending units and pipe without removing a ton of stuff.......Thanks

    1985 Full size, 305 motor, 700r tranny
     
  2. jimmyjack

    jimmyjack 1/2 ton status

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    There are two ways to deal with this. The first is to do it right and remove all the garbage in the way and build a taller stem like you said, or take some solvent, cleaner, I use 409, and spray the base where it threads into the block. Use q tips or whatever and get rid of all the old oil and grime and grit then silicone it. I had a bad oil leak in the back of my intake manifold. I REALLY didn't want to remove it so I gooped the bejeezis out of it. It lasted 2 yrs. /forums/images/graemlins/shocked.gif
     
  3. rogerwilco71

    rogerwilco71 1/2 ton status

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    Hate it when that happens, especially without a body lift. Pull all the crap out and fix it...you'll sleep better. Are you sure it's just not the oil-pressure sending unit? They tend to pop after so many years (twice in ten years for me). I'd replace it for the $19-20 while you're in there.
     
  4. scavenger

    scavenger 1/2 ton status

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    Thanks Jimmyjack and Rogerwilco71,
    It is leaking where the pipe goes into the block. I turned it as much as I could (a quarter of an inch) before it hits ups against something and it still leaks. It's off to Napa I go to get everything so I can do it right....thanks again.
     
  5. R72K5

    R72K5 Banned

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    might as well convert to mechanical while youre back there anyways, dont have to have tall stem for that and can tighten it up all you want, i just converted my 81 over to mechanical when i swapped in the 350 engine

    good luck
     

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