Stephen3452

So it gets louder because you hear the air going in as well as out? I see. yes, you were quite right: they changed the stepper motor.

Thanks for the replies they have helped explain a lot. I certainly had some white smoke as it failed, so that must be what happened.

Hello, Has anyone else had problems having their tyres changed and balanced. I had the front pair changed some months ago (from non-Citroen garage) and had to come back a few days later because they didn't have the right part. I didn't know what that meant at the time. Now the back pair are worn so I went to a different garage and had to wait whilst they hunted for an adaptor to fit the wheel to the balance. I'd forgotten about my experiences last time, this made me remember them. I'm guessing this adaptor was the missing part last time? Next time I'll call in advance! This is with Citroen alloys BTW, so steel wheels might not have the same problem. Now my next question: When having wheels balanced should they be balanced perfectly or are there tolerances? I ask because in the garage I visited there was no waiting area so I stood by the car and watched them work (hence I saw the confusion about the adaptor this time). The thing is that when balancing, the machine said to add 5g and they said 5g was not worth bothering with. Is this right? I would think if the machine says add it you add it? What tread depth do you change at? I read an AutoExpress article stating that after 3mm, your stopping distance in the wet increases by eight car lengths and they recommend 3mm.

Hello, I am the original poster. Sorry for the delay, first I went on holiday, then I had computer problems, but now I am back. I cannot get the forums to log me in so I have had to re-register. Dealer one said they had replaced the motor and there was nothing more they could do. I had some other (turbo) problems that they could not resolve so I went to another franchise. they fixed both the a/c and the turbo. They fitted another stepper motor. To clarify the fan speed soes not increase when I select recirc, it just gets louder, I presume as a consequence of the valve bing shut it changes the acoustics of the pipework.

Hello, I am the original poster. Sorry for the delay, first I went on holiday, then I had computer problems, but now I am back. I cannot get the forums to log me in so I have had to re-register. It seems my local franchise kept trying to repair the turbo. I got fed up with breaking down and being towed in (four times so far) that I lost confidence with them and phoned another franchise for a second opinion. They booked the car in and replaced the turbo. They told me that they never repair turbos; they always replace. The whistle was the bearings in the turbo. I know about not revving turbos when you switch off, but I don't know how I know this. I am sure that Citroen did not tell me. They ought to put it in big letters in the handbook or a big stickre on the steering wheel when you buy the car. Anyway, I am sure I have not revved it when I switch it off, as I drive on to my drive I slow down so as not to hit the garage wall and then switch off when I am at a standstill. What's inside a turbo? Is it just a fan that forces air into the engine under pressure? Is it mechanically driven by the engine? Why does revving it wear it out?