E46Fanatics - View Single Post - DIY: Intake boot replacement. No more whistle while accelerating
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Old 09-14-2012, 03:28 PM   #89
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Join Date: Oct 2010
Location: White Plains NY & Weeki Wachee FL
Posts: 288
My Ride: 02 330Ci
Thanks for the writeup! I definitely had to remove the cabin filter and the heat shield next to the brake booster. Also had to unclip the booster vacuum hose and fuel vapor return line from the manifold. The clamp holding the lower tube to the throttle body was easy to get with a 2' screwdriver from under the car. At least, it's easy if you _have_ a 2' screwdriver. The clamp holding the smaller branch of the lower tube was a mother to get at, ultimately requiring a 1/4" ratchet and a 2" extension and extensive contortions.

I was concerned that after all this work I'd still have my whistle, because unlike most of you, I did not have a SES light or any rough running. My whistle occurred at random times, throttle openings and RPMs. Happily, I found cracks thru each accordion fold of the small tube!! It just started pouring rain, so I'll get back out and finish up when the waether improves...

Last edited by CharlieFoxtrot; 09-14-2012 at 03:29 PM.
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