4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

noise from underdrives?

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Old 07-17-2006, 09:52 PM
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yelw02GT
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Default noise from underdrives?

ever sense i put my under drive pulleys in, they been in for a few months, when the car is at op-temp idling, it makes this really weird kinda high pitch sound, kinda like a drone its hard to explain, coming from the front of the engine, any ideas?
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Old 07-17-2006, 09:53 PM
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redass02gt
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Default RE: noise from underdrives?

the consensus on this forum is that the BBK u/d pulleys are bad news because of the "piggyback" design.
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Old 07-17-2006, 09:54 PM
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yelw02GT
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Default RE: noise from underdrives?

explain
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Old 07-17-2006, 09:55 PM
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ousooner28
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Default RE: noise from underdrives?

shoulda went steeda
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