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Thread: valve train problem
          
   
   

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  1. #1
    drumsk is offline CHR Member Visit my Photo Gallery
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    valve train problem

     



    I have excessive clatter on the #3 intake or exhaust valve to the point where the engine dies for a second. I tried to set the rocker to specs and it goes a way but comes back...... any ideas what this might be..... the head was rebuilt 5000 miles ago.... new roller lifters and rocker arms and push rods

    The vehicle is a 1988 formula 305 tbi and help would be great
    Kenny

    p.s 60 psi when i start the pig and between 15 to 20 at idle a 500rpm which has to be raised to 600 rpm

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  2. #2
    techinspector1's Avatar
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    Pressed-in rocker studs may be pulling out of the head
    PLANET EARTH, INSANE ASYLUM FOR THE UNIVERSE.

  3. #3
    lt1s10's Avatar
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    Re: valve train problem

     



    Originally posted by drumsk
    I have excessive clatter on the #3 intake or exhaust valve to the point where the engine dies for a second. I tried to set the rocker to specs and it goes a way but comes back...... any ideas what this might be..... the head was rebuilt 5000 miles ago.... new roller lifters and rocker arms and push rods

    The vehicle is a 1988 formula 305 tbi and help would be great
    Kenny

    p.s 60 psi when i start the pig and between 15 to 20 at idle a 500rpm which has to be raised to 600 rpm

    Report this post | IP:
    Check the studs like tech said, but are you checking the compression with the motor running, or am i reading it wrong?
    Mike
    check my home page out!!!
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  4. #4
    drumsk is offline CHR Member Visit my Photo Gallery
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    .............

     



    Have not done a compression check all around yet...........

    the stud maybe be pulling out becuase the tick went away for a week and came back but I also added marvel mystery oil

    I am running a crane cam and a set of crane lifters........

    Kenny

  5. #5
    pat mccarthy's Avatar
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    if this this a roller cam engine? i think it sound like a stud like tech said

  6. #6
    lt1s10's Avatar
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    OK the 60 psi is oil pressure.
    Mike
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  7. #7
    techinspector1's Avatar
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    Lay a straight-edge across the top of the studs and you'll be able to see if any are pulling out.
    PLANET EARTH, INSANE ASYLUM FOR THE UNIVERSE.

  8. #8
    drumsk is offline CHR Member Visit my Photo Gallery
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    how do i fix it if the stud is pulling out........... head has to come off.......... which is not a big deal I put the engine together............

    only has 5000 miles on her besides the ticking she was running great and a slight exhaust leak

  9. #9
    pat mccarthy's Avatar
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    Originally posted by drumsk
    how do i fix it if the stud is pulling out........... head has to come off.......... which is not a big deal I put the engine together............

    only has 5000 miles on her besides the ticking she was running great and a slight exhaust leak
    how good are you with a hand drill and a tap you can drill and tap it but you have to be rigth on and do not get chips in the engine

  10. #10
    lt1s10's Avatar
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    Originally posted by drumsk
    how do i fix it if the stud is pulling out........... head has to come off.......... which is not a big deal I put the engine together............

    only has 5000 miles on her besides the ticking she was running great and a slight exhaust leak
    drive it back down to where its suppose to be and drill it and install a roll pin in it. be carful not to get any shavings down in the motor
    Mike
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  11. #11
    drumsk is offline CHR Member Visit my Photo Gallery
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    well I am work as a mechanic for a fueling company at newark airport. So I am quite good with a drill plus I like to restore old car's(69 firebird, 67 t-bird) so roll pin and drill ehhhh..... should I use a right angle dill or will a normal drill do? Also can I go in on a 90 or do i go in on an angle.......

    I have enclosed a pic of my car tell me what you think

    I just had her painted
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  12. #12
    pat mccarthy's Avatar
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    Originally posted by drumsk
    well I am work as a mechanic for a fueling company at newark airport. So I am quite good with a drill plus I like to restore old car's(69 firebird, 67 t-bird) so roll pin and drill ehhhh..... should I use a right angle dill or will a normal drill do? Also can I go in on a 90 or do i go in on an angle.......

    I have enclosed a pic of my car tell me what you think

    I just had her painted
    you can pin it. but you can buy a stud and tap the head this may be a better way to go

  13. #13
    drumsk is offline CHR Member Visit my Photo Gallery
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    better pic

     



    car still has to be buffed out by the man that painted it
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  14. #14
    drumsk is offline CHR Member Visit my Photo Gallery
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    .........

     



    is this something a local pats house would have...........

    Kenny

  15. #15
    pat mccarthy's Avatar
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    yes they did have them dorman had them they were just a stud fine on top and coarse on the bottom and i do not think you had to drill it out much to tap it car looks very good

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