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Springs In My 308 Thingamajob Are Broken, Now What?

Discussion in 'Technical Q&A' started by donaldh2o, Oct 7, 2004.

  1. donaldh2o

    donaldh2o Karting

    Nov 10, 2003
    143
    Irvine CA
    Full Name:
    Don
    My 308 is missing and backfiring on the front four cylinders. I put a timing light on it and discovered when I revved the engine there was no advance on the flywheel on the front bank.

    After removing the distributor and disassembling it, I found a thingamajob that looks like it might have something to do with advancing the ignition.

    It attaches to the back of the distributor, has two arms with two spring loaded dohickees in each arm. It appears that only one spring is working, the other three seem to be broken or so weak the dohickees don't work.

    Question: Where do I get new springs?

    BTW, Hi everyone, I haven't been here for awhile.
     
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  3. ferrarifixer

    ferrarifixer F1 Veteran
    BANNED

    Jul 22, 2003
    8,520
    Melbourne
    Full Name:
    Phil Hughes
    www.superformance.co.uk do thingamabobs and dohickees by the bag ful!!

    Give Mike a call, he'll get it all going for you.....
     
  4. Mike328

    Mike328 F1 Rookie
    Rossa Subscribed

    Oct 19, 2002
    2,655
    Boulder, CO
    Full Name:
    Mike
    My feeling is that you're referring to the "points". They are very much related to advance; the idea is that as the cam spins faster, centrifugal (or is that centripetal?) forces come into play, but controlled by those very springs you're referring to.

    Sounds like you need a new set of points.


    --Mike
     
  5. Spasso

    Spasso F1 World Champ
    Silver Subscribed

    Feb 16, 2003
    14,612
    Land of Slugs & Moss
    Full Name:
    Han Solo
    They sound like springs for the centrifugal advance weights. The coil type.
     
  6. Ferrari_tech

    Ferrari_tech Formula 3

    Jul 28, 2003
    1,527
    UK
    Full Name:
    Malcolm W
    If indeed you are refering to the springs that control the centrifugal advance, you must be careful and make sure you are replacing like for like - tension / length. Also there are shims that fit behind the spring to give it more tension if required.

    When assembled you will need to check the advance curves for both sets of points, there are special testers for this, but I seem to remember that someone here devised a "simple" tester using an electric drill to run the distributer on the bench - it might be worthwhile checking the archives.
     
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  8. yelcab

    yelcab F1 World Champ
    Consultant

    Nov 29, 2001
    10,525
    San Carlos, CA
    Full Name:
    Mitchell Le

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