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Factory recomendation is 60k miles for "severe service" or 105k miles for "normal service". Industry standard has been 90k miles. A good time based interval would
http://wiki.answers.com/Q/When_to_replace_a_cam_be...
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That number differs by manufacturer. Refer to your owners manual for instructions about scheduled maintenance.
http://wiki.answers.com/Q/How_often_should_a_cam_b...
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Ford recommends it be inspected and replaced if needed at 60,000 miles. I have a 2002 ZX5 and I changed mine at 120,000 miles. 120 is a bit much but there was no visible wear on the
http://wiki.answers.com/Q/When_to_replace_cam_belt...
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Depends on the belt some belts last 75 so last 100 some last 50 if your running the oem belt 100,000 is good time to change i go about 75,000 i would rather be safe than sorry that
http://wiki.answers.com/Q/Whrn+should+you+change+c...
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