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    Toyota HiAce 2007 Problems

    Are you having problems with your 2007 Toyota HiAce? Let our team of motoring experts keep you up to date with all of the latest 2007 Toyota HiAce issues & faults. We have gathered all of the most frequently asked questions and problems relating to the 2007 Toyota HiAce in one spot to help you decide if it's a smart buy.

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    Why does my 2007 Toyota Hiace make a whistling noise?
    Answered by David Morley · 11 November 2020

    I’ll take a stab in the dark here and suggest that your van is a turbo-diesel (there was a petrol version offered as well, but the diesel was much more popular). If that’s the case, you could be dealing with a turbocharger that’s showing wear. Specifically, this is likely to be in the turbo’s bearing which will become noisy (and potentially emit a whistling noise) as the bearing starts to degrade. Turbochargers often spin at speeds of up to 250,000rpm, so the bearing really has its work cut out.

    The clue to all this is that the vehicle starts whistling when you press the throttle; that is, when you place a load on the engine and ask the turbocharger to start providing boost. That’s when the worn bearing becomes loaded (and noisy). But you could also be looking at something much simpler such as an exhaust that has collapsed internally and is offering a whistling soundtrack, or even a loose piece of intake plumbing that is also allowing the air passing over it to whistle. Perhaps there’s something in the gearbox that is making a high-pitched noise as well. You really need to have the vehicle looked at by somebody who knows their HiAces and take it from there.
     

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