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239 flathead ?

Discussion in 'The Hokey Ass Message Board' started by glmke, Jan 17, 2015.

  1. glmke
    Joined: Jun 1, 2007
    Posts: 789

    glmke
    Member

    Just replaced my water pumps, my question is, I am having trouble getting the belts tight, is there a trick to getting the generator and fan to rise, have tried a crow-bar but still having trouble getting the belts tight. ImageUploadedByH.A.M.B.1421559457.359408.jpg


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  2. 19Fordy
    Joined: May 17, 2003
    Posts: 7,108

    19Fordy
    Member

    IMG_5119b.jpg 1. Loosen the two 5/8" bolts that attach the fan carrier bracket to the cast iron generator mount.
    2. Loosen the BIG not on the cast iron generator bracket.
    3. Raise the cast iron generator bracket so belt is tight - ( 3/4 to 1 inch play in belt) and retighten big nut.
    4. Raise fan mount carrier bracket until belt is tight and re-tighten the two 5/8 fan carrier bolts .
    I will post a photo tomorrow on where to place lever to raise gen. bracket and fan carrier bracket in steps 3 and 4.. Fan has been removed for better viewing. Photos shown are of a 1951 Merc narrow belt engine. I think Ford narrow belt is the same set up. You rest the tip of the screwdriver in the little valley of the timing gear cover near where it meets the block and pull up on the screwdriver handle so as to raise (and tighten) the generator bracket. Then you rest the hammer handle on the top of the water pump so that the end of the handle is under the fan carrier bracket and push down on the head of the hammer to raise (and tighten) the fan carrier bracket and fan.
     

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    Last edited: Jan 18, 2015
  3. BLUDICE
    Joined: Jun 23, 2006
    Posts: 1,476

    BLUDICE
    Member

    What year - kind of car?
     
  4. Mike51Merc
    Joined: Dec 5, 2008
    Posts: 3,856

    Mike51Merc
    Member

    Better to do this as a two-person job. One person lifts the generator and the other tightens the big nut.
    Do the generator first, then the fan. Make sure the bracket sits squarely in the track of the intake manifold, yours looks a little crooked in the photo.
    The belts don't have to be made very tight. As a matter of fact, too tight is bad for the water pumps.
     

  5. V8 Bob
    Joined: Feb 6, 2007
    Posts: 2,750

    V8 Bob
    ALLIANCE MEMBER

    All narrow-belt '50-'53 Fords and Mercs.
     
  6. BLUDICE
    Joined: Jun 23, 2006
    Posts: 1,476

    BLUDICE
    Member

    Why the flex fan?
    Anyone else runs flex fans on their flatheads?
     
  7. I was wondering the same thing.
    I agree with above advise. Two person job, but they don't have to be super tight.


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  8. You don't want to get them too tight & second you belts are riding too low in the groove on the pulleys.
    With a belt that low in the pulley I doubt you will ever get them to quit slipping. Rule of thumb as I was taught is 1/2" deflection on the longest span.
     
  9. 19Fordy
    Joined: May 17, 2003
    Posts: 7,108

    19Fordy
    Member

    Copy of DSC02100 (Small).JPG
    I use a flex fan on my 8BA because it is much lighter than stock and reduces load on fan bearing. Plus, I once had a stock fan where the stock fan blades work hardened and literally flew apart with pieces going thru the hood and radiator.
     

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  10. Thaplumbr
    Joined: May 7, 2012
    Posts: 119

    Thaplumbr
    Member

    image.jpg image.jpg image.jpg image.jpg Here's how I do it,once your through the slot on the bracket, you can pry up or down as necessary. I usually pry up with the end of the extension on a small block of wood behind the bracket to keep from scratching the intake,hope this helps!
     
  11. glmke
    Joined: Jun 1, 2007
    Posts: 789

    glmke
    Member

    Good tip


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