V70: General loud sloshing noise in front of dashboard whilst turning

[Morgasmotron]

hello everyone need some help to diagnose to hopefully resolve annoying issue im having on my V70 2009 2.4D estate
for several months im hearing this loud sloshing noise every time I turn or bank sharply round corner
At first I thought it may be bottles of water slung in the boot space rolling round in the back seat wells behind below me ( ive a load of stuff like most in the car ) but i took these away and the noise revealed itself to be sounding to come from the very most front of dashboard area.
now in last couple of months ive noticed an ingress in the heaviest of gales of water on the inside of the screen dripping down the screen to bottom where the air comes out , although not enough to notice a significant misting of the car window in the mornings when you come out to vehicle , like when you know you've got a stone chip hole thats leaking in.
it turns out on examination that my top seal is come away on the windscreen so I think about sealing this up , but on inspection by a local window fitter ex autoglass man he shows me the window is practically totally popped out and talks about getting a replacement as they cant guarantee they wont break screen when taking out to do seals

okay im thinking is this where waters coming in ?
i took off plastic cover over engine bay top that covers the pleniem chamber area is it called ( space that houses wiper motors) and cleared water release holes there i could see and there no visible water sloshing in that space .

i get the front window replaced in the end as Autoglass cheaper as i only pay excess am told its a safety issue so im covered
the Autoglass guy says hes done several of these lately volvo windows popping right out on that year 2009 as they havnt primed the seal area prior to them going through with the initial sealant and sure enough you can see the lack of bond when he removes the window out and how it comes away like its stuck on with pritt stickk ( which was a bit disconcerting as this was a ex paramedic fast response vehicle which would have been in excess of 100 mph regularly . as with autoglass men their totally on the clock for jobs so roadside reinstallation he's not got time to go into thinking where excess water noise is coming from he's just about replacing screen correctly and onto his next appointment booking .

Im left now with a newly sealed new windscreen but still the heavy sloshing sound coming from the front
Anyone have any experience of this issue ? where suppose could the water have got itself too ? apart from sounding like a strapped on fishtank IM totally worried i may be emerging wiring or components in water that no way of evaporating off or rusting stuff i dont need to be rusting
if anyone has any tips or points where they think I should start to rectify this issue id be eternally grateful for the advice

[Stephen2015]

Have you checked under both footwell carpets, you will need to remove the door trimmings to be able to lift the carpets up.

[Morgasmotron]

ill get on that now this weekend and look see for any ingress thanks stephen

[Peter86]

There are a few threads about windscreen sealing problems, I can't remember if volvo ever said it was there fault and paid back any money to people who had it fixed.

[Waynedance]

Bulkhead drainage holes clear? Is the bulkhead filling up with water (where wiper motor is).

[adsk]

I've had my 2009 S80 since new. About 1 month into ownership in April 2009 I had the same issue of water sloshing around. The dealer said it was a known issue, said Volvo had a fix and within 1 hour I was on my way home.

[Tomrowla]

Hello I found this link to the instructions sent by Volvo to the dealers, no sign up or charge was required, just scroll down to the grey box, click on it and you can download the 5 page PDF. https://www.tsbsearch.com/Volvo/TJ-20698

[Kbeal]

Did you ever get to the bottom of this? I have the same issue in a V70 the was my late father -in-laws.

[abra cadabra]

Hey folks, I have just dealt with this issue on a customers car and at the time couldn’t find the technical data for the infamous “drill point location” and so had to figure this out with trial and error. It was lucky hole number 5 that hit the jackpot. Thankfully I used 2.5mm drill bit so only tiny holes to seal up with a compound that turns to rubber. Anyway for those who are being driven mad by the water noise or the search for the information on where to drill, see below.

I did not go the wheel arch route I went at it via the plastic scuttle panel at the bottom of the windscreen as i read others had had success there. I removed the wipers, battery cover, scuttle panel, battery, battery tray and finally the plastic tray at the bottom corner of the windscreen that has a drain flap built into it, it’s just clipped in so pull out. Where you need to drill is exactly behind that tray.

The first hole I drilled in the right area was a little to high. The water poured out but I knew there was still some left so I drilled another hole lower down but above the sealant line as you can see in the pic.

Anyways hope this helps some folks, was interesting finding the location.

Cheers folks

[abra cadabra]

Ok for some reason the upload facility has rotated some of my pics 90 degrees and some are upside down haha. They are the correct way I my phone so can a MOD maybe fix this? Thanks