How to Check Your Advance and Retard Vacuum Pipe

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The vacuum advance is key to the good running of the engine. If the pipe or diaphragm are leaking, the engine will run poorly.

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2 Responses to “How to Check Your Advance and Retard Vacuum Pipe”
  1. Ian Williams

    My car was overheating. I tried this test using a vac pump. It wasn’t moving the baseplate inside the distributor when suction applied. Also I manually moved the plate across, covered the end of the tube but it didn’t stay in place, so I am suspecting the vac advance unit. .

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    • Customer Service

      Hi Ian, and thanks for contacting Skill Shack with Practical Classics.
      Skill Shack works in partnership with Practical Classics Magazine, which can provide in-depth answers to your question through their ‘Ask Our Experts’ pages. If you’d like to direct your query to practicalclassicshelpline@bauermedia.co.uk our team of experts will be able to help.
      Kind Regards,
      The Skill Shack Team

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