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Jeff Alton Jeff Alton is online now
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Join Date: Jan 2003
Location: Langley,B.C.
Posts: 12,114
Get a stethoscope and go hunting... An failing AOS can also create whistling type sounds as it sucks and crushes the oil fill pipe. Try removing the oil cap when the engine is idling. Much vacuum there? Did the noise change?

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Old 12-04-2015, 10:04 PM
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