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post #1 of 29 (permalink) Old 12-04-2006, 16:10 Thread Starter
nwj
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ZT wind noise

hello my zt has developed an annoying noise when driving into certain direction of wind. The noise sounds like a trapped hornet. I have noticed other threads about this but mine is different as when the windscreen washers are used it stops then starts again after quite a while. any ideas please?
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post #2 of 29 (permalink) Old 12-04-2006, 16:20
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Try taping your wipers to the screen and see if it happens, it might be the blades vibrating due to worn arm-springs.
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post #3 of 29 (permalink) Old 12-04-2006, 16:35 Thread Starter
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sorry missed vital bit off post i did try driving without wiper blades on and there was still this buzzing noise thanks for reply
any more ideas please
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post #4 of 29 (permalink) Old 12-04-2006, 16:43
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Maybe it's a rubber widscreen surround vibrating but being damped when wet from your screen wash, maybe try tape around screen and if so some silicone sealant may help.
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post #5 of 29 (permalink) Old 12-04-2006, 16:53
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Quote:
Originally Posted by nwj
sorry missed vital bit off post i did try driving without wiper blades on and there was still this buzzing noise thanks for reply
any more ideas please
it might be in your head? Stress at work?
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post #6 of 29 (permalink) Old 12-04-2006, 17:10 Thread Starter
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hmm maybe stress but sorry no will try the tape thing my sort of theory is that the pipe supplying the washers is vibrating when empty but cant decide if fluid for washers will drain back into reservoir when washer not in use
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post #7 of 29 (permalink) Old 12-04-2006, 17:13
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Quote:
Originally Posted by nwj
hmm maybe stress but sorry no will try the tape thing my sort of theory is that the pipe supplying the washers is vibrating when empty but cant decide if fluid for washers will drain back into reservoir when washer not in use
I dont know if it does, because when i use mine, they leak afterwards, streaks all down teh bonnet after a run, so presumably there might be water still at the head for it to leak like that? Im sure someone here knows.
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post #8 of 29 (permalink) Old 18-04-2006, 14:15
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Wind Noise

My R75 does the same but only at higher speeds (e.g. over 70) and it doesn't appear to stop if you turn the wipers on without the water.

That vibrating window washer is an interesting theory but again (with my car anyway) it doesn't appear to go away if the squirter is used on its own, only if the wipers are also turned on. I thought it must be a gap in the windscreen rubber that was temporarily filled when using the washers but I also wondered if it was the wind getting in a gap between the wiper blades and the window itself.

Maybe there is a common theme to this - I have Bosch wipers (the passenger side has a spoiler on it). What wipers are yopu using?
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post #9 of 29 (permalink) Old 19-04-2006, 16:37 Thread Starter
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hiya

Im using bosch wipers purchased from halfords but I think the drivers side has a spoiler on it. I have taken the sound proofing from bonnet and taped the water tubes to bonnet and replaced sound proofing. noise has stopped but then it wasn,t happening all the time so may be coincidence. Soory missed out another vital bit of info this being only happens at speeds above 70mph.
I did wonder about gap as my passenger wiper blade does not touch window near the end nearest to the wheel, but drove along without wipers fixed to car and still heard the noise. I didnt however drive without wipers and squirt washers!
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post #10 of 29 (permalink) Old 20-04-2006, 13:09
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It is a nuisance because it isn't there all of the time. Thinking back, mine only seems to occur in warm, dry, windy weather. I didn't notice it at all during the winter. Even then, it seems to depend which way I am facing the wind.

I think we can probably agree that it only seems to happen in windy weather and that it disappears for a while if you use the washers and wipers together.

The suggestion of the rubber around the windscreen seems very plausible but I would be interested to know if your tape around the washer pipes does the trick. Maybe if you taped one side only to see if the noise or regularity changed.

I thought I had fixed this last year when I discovered that a plastic connector for the throttle (on top of the engine) had snapped. I replaced it and it seemed to disappear.............but it came back again last month and that connector is still in place.

I think we need more input on this problem to see what else others have tried..............unless your tape really does fix it!
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post #11 of 29 (permalink) Old 20-04-2006, 16:38 Thread Starter
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hiya again

agree with your bit about warm weather but where I live and drive there are few decent fast roads coupled with dodgy weather and lack of daylight means less speed. Also windy weather not around when you need it. Also seem to remember possibly this particular noise only affected diesel version with atc fitted or am I going barmy!
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post #12 of 29 (permalink) Old 21-04-2006, 11:59
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Hi.

My car is 1.8 petrol and I have had many of the common problems highlighted on this forum. They tend to be niggly things and this buzzing wind noise is just another. When my car is running well (which is most of the time) it is really great to drive.

I agree that when you do find the time to look at the problem it will be the time when its not windy, or it is too wet. We have decent roads up here to give the car a blast (if you avoid peak times).

Could you update this thread if you find out whether the tape works. If I can think of anything else to try, I will do the same.
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post #13 of 29 (permalink) Old 21-04-2006, 16:06 Thread Starter
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hiya

will do

cheers
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post #14 of 29 (permalink) Old 21-04-2006, 16:11
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The passenger visor used to make the same sort of noise where it touches the roof in my 75cdt. (Usually above 60)
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post #15 of 29 (permalink) Old 24-04-2006, 16:13 Thread Starter
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Hiya been for a blast down the M5 and the buzzing noise is now deeper so I think this means that where I didnt tape the tube down completely the air is still getting through as less air equals deeper noise and higher noise is more air???? or am I going mad?
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post #16 of 29 (permalink) Old 24-04-2006, 19:40
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Hi.

No, I don't think you are going mad. I decided to try out your theory. I pulled out the clip from the insulation under the bonnet and it flew straight into the engine compartment and onto the engine under tray. B*ll*cks, I thought. That undertray is a nuisance, I've probably got all sorts in it. I must check it out sometime.

Anyway, I taped the tube up on both sides and put a piece of foam under the cross-over piece of the washer tubing. Then I stuck tape where the clip should go. It was quite breezy today and I went along the A19 and the buzzing was there but it did sound different, it didn't seem to last as long either and when I put the squirters on it disappeared (as usual) but didn't come back.......though we both know that doesn't necessarily mean anything!

I thought about this and decided that maybe I could try some foam along the length of the tube, with gaffer tape here and there (faffy, I know). Maybe even taping around the under-bonnet insulation because if this is the problem, then it might stop air getting under there in the first place. It's forecast for rain this week and I'm away at the weekend, so I don't know when I'll get around to it.

I'm still trying............it's a corker to work out though!
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post #17 of 29 (permalink) Old 04-05-2006, 09:30 Thread Starter
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hi alan

any luck with your wind noise mine has rather annoyingly returned so previous ideas just coincidence

whilst I am at it any more ideas from other members please ..............
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post #18 of 29 (permalink) Old 04-05-2006, 11:23
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Its been a while for me on here but I can answer this one directly. You have a small leak between the windscreen and the body of the car. When you use the washer fluid it temporarily blocks the leak as it is pushed up behind the seal at higher speeds. I had exactly the same issue on my MG ZT. It happened every time I travelled west on the M62 into the prevailing wind. I worked this out because I pushed the headlining out towards where the buzzing was and it stopped the noise. The only way you will cure it is to try and seal it yourself or have a new widscreen fitted as I did. Apparently the 75/ZT windscreen is a pig to fit (my dealer went through 3 screens fitting the replacement) and this causes a poor seal.
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post #19 of 29 (permalink) Old 05-05-2006, 08:49 Thread Starter
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hiya is the black seal between glass and body easy to remove and/or how easy is it to get5 at it behind the interior trim and also what sealant should I use? thanks for the reply
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post #20 of 29 (permalink) Old 05-05-2006, 09:01
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Hi,

It could well be something else, bear with me for a moment here. . .

The BMW 5 series (E39), which, as we know is of a very similar, high grade front end construction to the 75 can suffer from odd wind noise issues.

1. Are there rubber mounts where the jack goes under the car like on the BMW?? I seem to remember that there are from my 75 and seem to remember them being the same rubbers in fact.

There is a spiked bit of rubber, which pushes into a hole in the body. If one comes out, the wind rustling past the hole, draws air down the double bulkhead void and makes a bizarre wind noise from the windscreen at speed.

2. Front wheel arch liners. If these are misplaced/cracked, particularly where they join the under body belly panel, if appropriate, air can whistle in and up into the bulkhead void, giving another weird noise.

Both noises sound like they are coming from the screen.

Thought I would let you know, as I can imagine this may have taken some time to find out for the BMW owners as you will look in the wrong place. . .
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