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Discussion Starter · #1 ·
Hello.
I recently replaced the wipers on my 147 with new Bosch ones. The new ones squeal and squeak especially on intermittent wipe and only go silent if it is really pouring down. If I am traveling at speed on the motorway (60mph+) they start to skip on the windscreen. Any Ideas folks cos this noise is doing my head in.

Thanks
Pete.
 

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I tend to find the OEM ones best.

Seen as you've invested in a set of Bosch ones, are they fitted correctly? Is there a fin on the drivers side wiper to hold it against the windscreen at motorway speeds when in use? Finally your windscreen might need a good scrubbing to clear it of any grime that may be impeeding the wipers from functioning properly for you.
 

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Discussion Starter · #3 ·
I thought that myself Ciars and had my local spanner monkey take a look in case I had, he told me that they were in alright...he also mentioned like you that the screen may just be covered in grime so I washed it down with soapy water and then gave it a going over with some diluted meths but still no difference.

Pete.
 

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Soapy water or metholated spirits might not be enough to remove road-film, diesel oil deposits etc. A good clean with something like AutoGlym glass cleaner/polish would be better. Another trick if the glass has been washed thoroughly is to go over it with some crumpled-up news paper. (My free newspaper has lots of graphite in the printing ink - just check to see if the black ink comes off onto your hands!) This would leave a slight graphite film on the glass but would be invisible in use. Blade manufacturers also use graphite sometimes to bed-in wiper blades.

Do the blades chatter and judder in both up and down directions? If it is only in one direction it can mean the wiping edge is not flipping over correctly at the end of the stroke. If they are chattering in both direction I suspect firstly screen deposits, after that its down to the wiper blade design (stiffness of the rubber) and the arm spring-pressure.
 

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Potatoes .... ;)

No, seriously, someone (many, many moons ago) once told me rubbing a cut-side of a potato over the glass can make a difference ...

Then again, he was probably sitting in a bush with a camera in hand waiting for me to make myself look a right plonker with my King Edwards!! :rolleyes:
 

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gazza82 said:
Potatoes .... ;)

No, seriously, someone (many, many moons ago) once told me rubbing a cut-side of a potato over the glass can make a difference ...

Then again, he was probably sitting in a bush with a camera in hand waiting for me to make myself look a right plonker with my King Edwards!! :rolleyes:
Think that tip is as a de-froster on the windscreen.....don't know if you are supposed to use it before or after. :lol: :lol:
 

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The Bosch ones are generally really good, my lass has em on her A3. I'd be interested in how this pans out Irish cos I was thinking of sticking the Bosch ones on mine too.
 

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Holts Mixtra (or screenease) is a white foam spray that usually helps where all else fails:cool:
 

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GhostyDog said:
The Bosch ones are generally really good, my lass has em on her A3. I'd be interested in how this pans out Irish cos I was thinking of sticking the Bosch ones on mine too.
I have to agree the replacement blades I bought for my 147 were Bosch and they are generally very good. They rarely make a noise and after cleaning the glass they go back to being quiet again.
 

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Discussion Starter · #12 ·
Hello folk.
Washed the car on saturday, used some Autoglym on the windscreen followed by neat meths...the screen is so clean I could eat my dinner off it..as for the chattering its probably worse...the Bosch site is useless...thinking of changing to another brand of wiper..the Bosch ones are 3 months old..!!!

Pete.
 

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Discussion Starter · #13 ·
Called into my local autoparts shop and picked up some glass polish by Turtle wax. Polished the windscreen three times and that seems to have done the trick....now there is silence...blissfull silence...will keep the forum posted if things change.

Pete.
 

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Consider yourself lucky a squeaky wiper is your only problem :)
 

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Irish147 said:
Hello folk.
Washed the car on saturday, used some Autoglym on the windscreen followed by neat meths...the screen is so clean I could eat my dinner off it..as for the chattering its probably worse...the Bosch site is useless...thinking of changing to another brand of wiper..the Bosch ones are 3 months old..!!!

Pete.
Don't think meths will remove the rubber deposits on the screen left by previously worn wiper blades. The best you can tackle it with is either a good glass polish or the abrasive paste/cleaner for bug removal followed by glass polish. In wiper testing, on a windscreen buck, for car companies we would use a weak (5%) hydrocloric acid solution but don't try this on a car to get it clear of deposits. In really bad cases we had no choice but to replace the windscreen even though it was otherwise ok. With a clean screen it should 'sheet' when flooded with water - a continuous thin film of water - it should not bead-up like polished paintwork. You should also not be able to see the track left by the old wiper blades.
 

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I don't know about the 147, but the 156's wipers seem to suffer from juddering and noise in light rain too, especially with the rain sensor fitted as it seems just a tad too keen. My wipers are defiitely worse after a winter where there was sometimes ice on the part of the screen, maybe it wore them out.

On the 156 the tip of the driver's wiper can (just) hit the rubber glass surround as well, both my 156's have done this.

I use glass polish, I even tried Rainx-ing the glass just on the last part of the driver's wiper's movement, to no avail (it's this part that causes the noise). I think the heavily curved and raked screen makes life difficult. I've used Bosch wipers on other cars with great effect before, the better half's Focus has perfect action, probably as it has a flat screen!
 

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jwyatt said:
I don't know about the 147, but the 156's wipers seem to suffer from juddering and noise in light rain too, especially with the rain sensor fitted as it seems just a tad too keen. My wipers are defiitely worse after a winter where there was sometimes ice on the part of the screen, maybe it wore them out.

On the 156 the tip of the driver's wiper can (just) hit the rubber glass surround as well, both my 156's have done this.

I use glass polish, I even tried Rainx-ing the glass just on the last part of the driver's wiper's movement, to no avail (it's this part that causes the noise). I think the heavily curved and raked screen makes life difficult. I've used Bosch wipers on other cars with great effect before, the better half's Focus has perfect action, probably as it has a flat screen!
The original Alfa wiper blades on the 156 are Champion. Not as good as Bosch IMHO....other people could have differing experiences. The mechanism and motor is Magnetti Morelli (not sure of spelling) also inferior to Bosch. On the later 147, only Bosch systems are used.

I have not used RainEx at all so cannot comment ...car companies do not allow its use in testing because of adverse effects in some conditions. They have looked at similar glass treatments in the past but no car manufacturer that I know of has adopted it for new cars.
 

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Discussion Starter · #18 ·
Sunbar.
Do you reckon most wiper ploblems like the one I have had is down to deposits on the windscreen. Even with new wipers?

Pete.
 

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Irish147 said:
Sunbar.
Do you reckon most wiper ploblems like the one I have had is down to deposits on the windscreen. Even with new wipers?

Pete.
Most of the problems (at least those you can have any effect on ) - Yes.

Water is a very good lubricant for rubber onto glass.

Add rubber/oil/grease film contamination on the glass and its very different. Glass after a few months gets a lot of very fine scratches - perfect for any build up of contamination and difficult to remove. Most of this you can't see.

The only other question I would ask - Is the noise in both up and down directions. Could be that the arms are bent or worn.
 

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Discussion Starter · #20 ·
I was only getting the skipping and chattering on the back sweep. Gave the windscreen another two applications of the glass polish early on saturday morning and an hour after I was finished the heavens opened so I thought this would be a very good time to test the wipers. I headed first into the city to check the intermitant wipe, the wipers were like new..totally silent. I then headed out to the motorway to check them at speed where I was getting chattering at 70mph+. Again silence...if anything the get better the more you use them. Another plus was while overtaking trucks which is usually a pant soiling activity in heavy rain. I had the wipers on their fastest setting..the rain would sheet off the windscreen, I definitely could see more. Good stuff this polish.

Pete
 
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