Olson pan to pickup clearance, is 1/2" ok.
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Olson pan to pickup clearance, is 1/2" ok.

  1. #1
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    Default Olson pan to pickup clearance, is 1/2" ok.

    Olson 12 qt v drive pan. Milodon pump. I have 1/2" clearance pickup to pan. Am I ok with this? I can close it up to 3/8 by using a washer under the stud but it puts the tube in a slight bind so I would rather leave it as is if ok at 1/2.

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  3. #2
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    Default Yes, but.....

    Quote Originally Posted by Hillbilly View Post
    Olson 12 qt v drive pan. Milodon pump. I have 1/2" clearance pickup to pan. Am I ok with this? I can close it up to 3/8 by using a washer under the stud but it puts the tube in a slight bind so I would rather leave it as is if ok at 1/2.
    Yes, your 1/2" is fine, BUT, have you inspected your Milodon pump??? The last Milodon pump I looked at was .007 out of square to the impellers... .002 on one end and .009 on the other. The oil pump is the heart of your lube system, please check it closely. (And yes, it was their "high dollar" version pump)...
    Ideally, there should be .002 clearance between the cover and the gears, and the cover should fit square to the gears within .0005/.001. ALSO, make sure the drive shaft isn't preloading the drive side... Make sure the distributor fits ALL the way down on the intake without a gasket, then add the gasket to be sure there is clearance in the drive....
    Please, the pump ISN'T a place to cut corners on tight tolerances... Very few "out of the box" pumps are close enough inside for a boat engine...
    Ray
    LOUD BOATS SAVE LIVES

  4. #3
    steelcomp was here
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    Default

    Personally I'd never run over 3/8". I shoot for between .300" and 3/8". No more, but Ray is dead on about checking the pump and the clearances he recommends.
    Once you get teh pickup where you want it, you can heat the tube with a torch till it's red hot and it'll "un bind" itself.
    Last edited by scott foxwell; 12-13-2014 at 10:23 PM.

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  6. #4
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    Default Too close/too far...

    Quote Originally Posted by scott foxwell View Post
    Personally I'd never run over 3/8". I shoot for between .300" and 3/8". No more.
    I'd worry about .300, but yeah on the 3/8ths to 1/2".... I guess a lot would depend on his choice of oil and how fast it will flow into that extended area below the pick up...
    Ray
    LOUD BOATS SAVE LIVES

  7. #5
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    Already went through the pump. And your right had to surface the cover, the housing, set gear end clearance at .0025 and de burr the casting. The melling I had before was pitiful out of the box also. All good Chinese castings I suppose. I set my distributor collar flush with no gasket then added the gasket which is .026. I will set the pickup to 3/8. As far as oil I am using 30wt joe gibbs break in oil then going to 15-40 brad penn for a starting point. Thanks for the replies guys, I appreciate it. Galen
    Last edited by Hillbilly; 12-13-2014 at 11:51 PM.

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