The Situation

Whistling when revving

11 posts in this topic

Has anyone ever come across a whistling kind of sound from engine bay when revving???

Should I be worried would be the next question????

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Take your DPF off then you'll hear some whistling

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I would love to take it off as I only do multiple short stop/start journeys in inner London which is a killer for the DPF, but anyone tell me the pros & cons and more importantly how much on average for removal remap etc?

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Ecotune is £865, for the bits which includes two maps, although this does not include labour price for DPF removal. Although I bet there are a load of people in East london who can do it.

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Baus

No luckily my whistling noise sounds a lot nicer and after what Del Boy said, does sound turbo-esque!!!

I take it your example is of one that is causing a problem???

I still my BMW warranty up until August this year and so was not overly worried but still would have been a stress!!

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Yeah the one of the video clearly had a problem, a little whistle is perfectly normal. A lot of people are lead to believe any turbo whistle means its knackered, completely wrong. When you've got air spinning at thousands of rpm it'll make a noise. Think of how wind whistles at 80 mph.

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Might be a warped AC fan blade, that runs constantly while the engine is running, they sometimes warp a plastic blade out of shape and whistle a bit.

I once had this problem...it was cured by the blade coming of at 80mph on the motorway, throwing lot's of plastic down the road, but not much other damage around the engine / bonnet...blumin pleased it was a plastic blade not a metal one.

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Since the removal of my DPF the small turbo sounds like it's going to explode on small throttle settings.

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