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Ford 9N, 2N & 8N Discussion Forum
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Author 
A. Bohemian

03-28-2007 13:59:34




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Are you sure you are hearing pre-ignition noise and not valve clatter?

One often starts to hear lifters complaining as the car approaches 100k miles. If the lifter is not working properly, it is possible that a valve is not closing completely, which allows oil to leak into the combustion chamber from above.

If the leak is slow enough (and they usually are) one sees a little puff of oil smoke at start up, which disappears after the oil burns off.

Check your plugs to see if one looks oily or carbon-fouled.

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