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contact gap for w123 engine

Discussion in 'Electrics, Vacuum, Ignition and ECU' started by julian dodwell, Oct 19, 2012.

  1. julian dodwell

    julian dodwell Active Member

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    Joined:
    Sep 12, 2008
    Location:
    South West France
    Your Mercedes:
    230 Coupé,Silver, 1977
    I am looking for the gap measurement for the contacts in my 1977 230c w123 ?
     
  2. wireman

    wireman Senior Member

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    Joined:
    Sep 20, 2005
    Location:
    lancashire
    Your Mercedes:
    nice 201 2.5D 1993 & very nice 129 SL500 1994
    Its commonly 0.015"/0.4mm, any more leads to excessive breaker arm velocity and consequent points bounce. I do not have the specific data for your engine but 15 thou was quite standard on most older distributors and I can't think of one that I ever dealt with which was any different.

    Do beware that the points gap affects the ignition timing and that if the timing is to be set up then the points gap must be set first.

    It is an old car and wear may have taken place on the dizzy cam, or the bearings supporting the dizzy shaft, check it on all four lands to be sure that your ignition will be consistent.
     
  3. television

    television Always remembered RIP

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    Joined:
    Mar 14, 2005
    Location:
    Daventry
    Your Mercedes:
    2002 SL500, 216 CL500, all fully loaded
    Interesting wireman,,yes the bearing could wear making it very hard to get even firing, I think too that 15 thou was pretty standard:D
     

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