Got a question. fuel pump eccentric

Small Block Mopar Engine

  1. Slappy

    Slappy FABO Gold Member FABO Gold Member

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    I went to put this fuel pump eccentric on and noticed it has a keyway cut into it. When I installed it I lined it up with the keyway on the camshaft. The keyway doesnt come out far enough to engage the eccentric. In otherwords there isnt enough cam sticking out to engage the eccentric. Is this right?? If you look at the photo you will see the keyway.
     

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  2. 71DartGuy

    71DartGuy Well-Known Member

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    Is it a magnum block with a roller cam? If so you need an extension to run a mech fuel pump
     
  3. Slappy

    Slappy FABO Gold Member FABO Gold Member

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    It is an LA block. hydraulic cam
     
  4. Slappy

    Slappy FABO Gold Member FABO Gold Member

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    The timing set I have came with the block. It was new never ran. Are the timing sets different? Maybe have the wrong one?
     
  5. green1

    green1 Well-Known Member

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    Can't remember; the slot keys into sprocket, I think. No key on the cam, except for sprocket. If no answers, I can look at my parts in the AM.
     
  6. 360duster

    360duster Well-Known Member

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    Hi,

    maybe your cam sprocket is not fully engaged on the cam - watch if the Gears have some space behind.

    Do you use a chain tensioner?

    Michael
     
  7. Slappy

    Slappy FABO Gold Member FABO Gold Member

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    Cam and cam gear is all the way back. Not sure if eccentric rides on cam or rides on gear. Seems to me it should ride on something.
     
  8. Slappy

    Slappy FABO Gold Member FABO Gold Member

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    This set does have 3 way adj on crank gear {3 key ways}
     
  9. 360duster

    360duster Well-Known Member

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    the 3 keyway on the lower gear should have no influence at your cam sprocket or pump eccentric.

    The Cam can go a little further in as it should be during operation. Try to pull it outwards against the thrust plate - you´ll see if it works. maybe this is the amount you need to push back the cam sprocket and engage the fuel pump eccentric.

    Michael
     
  10. RedFish

    RedFish Well-Known Member

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    Thy this, put only the washer and bolt on the cam shaft. Use a small pry bar between the cam sprocket and washer to put the shaft forward through the sprocket. If you can get just a little of the key itself exposed, the eccentric will engage.
     
  11. Slappy

    Slappy FABO Gold Member FABO Gold Member

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    Ok thanks Guys I will try all the above and post the results
     
  12. Slappy

    Slappy FABO Gold Member FABO Gold Member

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    ok started fooling around with this problem again. I took the advise. I did move cam more towards front and had plenty of room now for the eccentric. But now after I tighten the cam bolt on the end the eccentric remains loose! If I tap the end of the bolt and slide the cam back torwards rear of motor the eccentric remains tight. This is def not right. I have a quarter inch of play between cam thrust plate and rear of motor. Do I have wrong timing set? What would keep this tight once timing cover is installed? I am thinking the back of the cam gear need to be a quarter inch longer to make it right. So basically with everything bolted up and chain on the cam moves forward and backwards a quarter inch. What gives???
     
  13. Slappy

    Slappy FABO Gold Member FABO Gold Member

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    Update. If you take the dish style washer that goes under mounting bolt and put dish side in torwards rear of engine everything is perfect. So the question now is does the dish side of washer go towards rear of engine or front of engine. Im thinking I just had washer upside down.
     
  14. Slappy

    Slappy FABO Gold Member FABO Gold Member

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    here are the pix with washer installed both ways. cant put timing cover on until I know. with dish of washer faced to rear of engine everything seems lined up and cam tight. this is first pix. With the dish facing outwards the cam moves and the eccentric is not tight. Help! lol
     

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  15. Slappy

    Slappy FABO Gold Member FABO Gold Member

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    Ok thanks to cudachicks man Billy. He called me to help me out. Thanks Billy. Cupped part of washer goes to the rear of engine.
     
  16. weldedrail

    weldedrail Well-Known Member

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    First picture is correct.
     
  17. camd64

    camd64 Remember Landy

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    Yep the first pic is correct. Cupped washer towards rear and thrust plate needs to be on. The cupped washer pulls the cam forward against the thrust plate then just line the keyways up and you're good to go.
     
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