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56 259 v-8 help

Discussion in 'The Hokey Ass Message Board' started by jrogers80, May 6, 2010.

  1. jrogers80
    Joined: Nov 1, 2009
    Posts: 15

    jrogers80
    Member

    OK guys, I have been rebuilding a 56 stude truck. i have all the parts, had the block and heads redone at a machine shop and this little engine is the most confusing engine i have ever seen. I have a shop Manuel for stude trucks but it to is confusing. my question is which way does the offset on the rods go on the crank? there are left bank rods and right bank rods, i know how to tell the difference but i do not know which way to put the offset. i know that the oil squirters in the rods should go up but when done like the book, rods on one bank have squirters down. confusing to me. anyone know the answer to my question???
     
  2. RichFox
    Joined: Dec 3, 2006
    Posts: 10,020

    RichFox
    Member Emeritus

    Look at the crank pins. There is a radius between the crank pin and the cheek. That is why the bearing shell is offset in the rod. So it won't drag on the radius. This is pretty much true of most V8s. The bearings will be offset toward the center of the cranl pin. Same as a SBC, SBF, MoPar, Packard, BBC and so on.
     
  3. jrogers80
    Joined: Nov 1, 2009
    Posts: 15

    jrogers80
    Member

    this is true but when they are turned this way one oil squirt hole is up in the corect position and the corresponding rod oil hole is facing down. so one piston will oil the cly and the other will not. the pistons are on the rods correctly.
     
  4. RichFox
    Joined: Dec 3, 2006
    Posts: 10,020

    RichFox
    Member Emeritus

    Not sure I understand. In fact I am sure I don't understand. The notch on the top of the piston goes towared the front. T slot goes on the left side of the engine. Drivers side. All the oil holes go on the opposit side. They both point up. Particulary when the piston is at TDC. Hope this helps. All T slots to left side of engine all oil holes to right side of engine
     
  5. 73RR
    Joined: Jan 29, 2007
    Posts: 7,342

    73RR
    Member

    It can't hurt to double check the piston/rod assembly.
    Place the pistons (with rods) on your work bench, in the same staggered position that they occupy in the engine. 1-3-5-7 and 2-4-6-8. Pretend the engine is upside down.
    Now, pair the rods from the opposite pistons, lets say 1 & 2, and verify that the chamfer in the #1 rod big end is on the opposite side, away from, the #2 rod, and vice-versa.
    Although all of the 'squirters' should be pointed in the same direction, the bearing will not live long if the chamfer is wrong.

    .
     
  6. jrogers80
    Joined: Nov 1, 2009
    Posts: 15

    jrogers80
    Member

    thanks guys. maybe this will help. will check back later
     

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