02 protege noises above 3k rpm - Mazda3Club.com : The Original Mazda3 Forum
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3rd Gen Protege/MazdaSpeed/P5/MP3 General/Maintenance Discussion for 1999-2003.5 Models Only (BJ Chassis)

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Old January-1st-2017, 06:44 PM   #1
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Unhappy 02 protege noises above 3k rpm

i have a 2002 protege 2.0 5spd, mazdaspeed exhaust and an unknown cold air intake. i just got it and found it makes an odd knock? noise above 3000 rpm. someone told me its the "flanges inside the intake manifold" which im not sure if i believe. anyone know what this is and how to fix it?
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Old July-22nd-2017, 12:22 PM   #2
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common

The noise coming from the intake, is called the VTCS (?) I believe, you can thank Ford for that. Another common issue with these motors are the rod bearings. They usually make noise right at 3k and no other rpms. Easily replaced and the motor will be good for another 100k.
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