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Bad Cam

Discussion in 'The Garage' started by roadnotca, Dec 28, 2005.

  1. roadnotca

    roadnotca 3/4 ton status

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    DELETE. Operator error. Good thing I don't drive a school bus.:o :o :o :o :o :o :o :o
     
    Last edited: Dec 29, 2005
  2. 76zimmer

    76zimmer Flyin Rat Premium Member GMOTM Winner

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    Are the 2 dots on the gears lining up when you have the cam gear dot at 6oclock? If those index together, it should be correct valve timing.
     
  3. Russell

    Russell LB7 Tahoe Status Premium Member GMOTM Winner

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    Are you sure it isn't just 180 degrees out? That isn't impossible to do, and would be far easier than calling comp cams for a new cam, lol
     
  4. roadnotca

    roadnotca 3/4 ton status

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    I'll answer these indivually so I don't lose anything. If ya look close you can see the cam gear dot at 12:00, 90* cw from the pin "hole", which is correct like I say, Milodon timing set is correct. The cam "pin" should be at 03:00 with the next event at ~90 AFTDC is #1 exhaust valve, which is the lobe that does open #1 ex on this lump. This lump is ex #1 ~90* before the cam's index pin, should be ~90* after the pin, ie 180* out.
     
  5. roadnotca

    roadnotca 3/4 ton status

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    So yea, I'm sure it's 180* out and now thinking back, I don't trust this stick no matter how far I can toss it; like I said at the post, it didn't have the traditional ID on the butt end either. No one can afford to take a chance on something this integral to the motor. I can wait until at least 08:00 TN time tomorrow to find out if this wasn't part of a production run of turkeys cooked-up about the end of Nov.
     
  6. gmtech954

    gmtech954 Registered Member

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    remember crank makes 2 revs for one rev of cam so therefore if it was at 9 and was supposed to be at three you are on an exaust stroke not a comp stroke
     
  7. hack500

    hack500 1/2 ton status

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    hehe, the good ol' "yeah just like up the dots and drop the distributor in at #1 tdc".... and it'll be 180* off. hehehe with dots lined up #6(iirc) is firing.:haha:
     
  8. roadnotca

    roadnotca 3/4 ton status

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    Thanks guys, koodos for helping the handicapped.:o
     
  9. gmtech954

    gmtech954 Registered Member

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    no prob we all have our lapses at least on this sight we could all help eachother out before we go to far off the deep end
     
  10. mofugly13

    mofugly13 1 ton bucket of rust Premium Member

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    When you solve your problem, don't go back and delete your post! Someone is gonna need that in a search a while down the road.
     
  11. Russell

    Russell LB7 Tahoe Status Premium Member GMOTM Winner

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    Plus, you have a real pretty engine, and we all like seeing pretty engines!
     
  12. roadnotca

    roadnotca 3/4 ton status

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    Now it's ready for the transplant....nurse??:D
     
    Last edited: Jan 18, 2006

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