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Thread: distributor cap & rotor arm/button how often to change?

  1. #1
    Join Date
    Jan 1970
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    back in the suburbs, near joondalup
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    distributor cap & rotor arm/button how often to change?

    I was thinking its probably about a year since I fitted a new OEM cap and rotor arm.
    How often should these be changed?
    I looked on the service sheet but it doesn't mention them.

  2. #2
    Join Date
    Apr 2009
    Location
    Crafers West South Australia
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    Depending on your usage pattern, 100,000km to 200,000km. They usually look worn around the terminals inside the cap. An annual shine-up with a clean dry cotton rag is no mistake.

    If you don't read the newspaper, you're uninformed. If you read the newspaper, you're mis-informed.
    Mark Twain

  3. #3
    Join Date
    Jan 1970
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    back in the suburbs, near joondalup
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    late reply, I'm still not getting email notification for posts :-/

    thanks for that though 100k minimum wow, that's a lot of K's for a set of contacts, but good news :-)

    Not so much now but many years ago I used to give the arm and cap a light wipe with emery paper, it seemed to help.
    I just replace the cap these days though.

  4. #4
    Join Date
    Jan 2013
    Location
    Yarra Valley, Victoria
    Posts
    21
    Quote Originally Posted by HangOver View Post
    late reply, I'm still not getting email notification for posts :-/

    thanks for that though 100k minimum wow, that's a lot of K's for a set of contacts, but good news :-)

    Not so much now but many years ago I used to give the arm and cap a light wipe with emery paper, it seemed to help.
    I just replace the cap these days though.
    I wouldn't expect a set of contacts to last that long. The heel wears as well as the contact faces. The most important thing is to ensure you have a ballast resistor between the coil and the dizzy. Some coils have it inbuilt, eg Bosch GT40R.This drops the voltage across the points and reduces erosion of the contact faces. You haven't stated what year your Landie is, and whether it was all Lucas electrics ex factory.
    Have a look at www.distributordoctor.com - not cheap but worth it
    Last edited by LR1953; 16th February 2013 at 10:13 AM. Reason: additional thoughts

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