S40 leaking passanger footwell

domhart10 · Oct 23rd, 2017, 09:16

Hey Guys,

So after the huge amounts of rain we have had down here I have found a leak in my car, the passenger footwell is all wet and carpets are soaked. I know there is some known problem with some drainage on these cars with a sun roof ... but I don't have a sun roof, so I am really not sure where to look next, any ideas?

Welton · Oct 23rd, 2017, 11:02

Oh no that's tricky, typical routes for water entry vary and can depend on parking flat or on a hill etc.

The rear light cluster can let in water on some cars and find its way onto the floor pan. Also the door seals and whether the 'splash guard' sheet within the door has been removed/disturbed.

Be worth checking the scuttle drains at the bulkhead within the engine bay just to make sure the little rubber outlets are free from dirt (you can squeeze and poke them about) not sure on the Volvo but some cars let water build up at the bottom of the windscreen and then it spills over into the cabin via the ventilation system.

Good luck!

domhart10 · Oct 23rd, 2017, 11:16

thanks yeh hopefully when it stops raining soon I will dive in and have a look. so just to add on that ... it looks like there is water in the centre door light as well up in the roof

LizardOfBodom · Oct 23rd, 2017, 12:32

I really hope I am knocking in the wrong door, but just to be safe make sure its only water and not the coolant. You probably heard some stories on internal heater leaking coolant due to plastic knee broken.

Hope you find the source of the problem asap!

btw - maybe put some protective foil over your CEM just in case its leaking that way, before you discover where the source is?

edit - just understood the "water in light" part so its probably related to upper leak - in that case, how about the seal between corners of windshield and the pillar? those are known to degrade in age aswell...

AndyMcc · Nov 9th, 2017, 14:02

It's the windscreen seal. Had the same problem. If you place your palm inside the windscreen and push out you'll probably see movement along the sealing edge.
Not an uncommon problem

domhart10 · Nov 9th, 2017, 16:36

Yeh I still haven't found or fixed it but I will have a check this weekend to see if that was the problem and update here

Oct 23rd, 2017, 09:16	#1
domhart10 Volvo S40 Last Online: Yesterday 23:26 Join Date: Mar 2015 Location: Chichester	S40 leaking passanger footwell Hey Guys, So after the huge amounts of rain we have had down here I have found a leak in my car, the passenger footwell is all wet and carpets are soaked. I know there is some known problem with some drainage on these cars with a sun roof ... but I don't have a sun roof, so I am really not sure where to look next, any ideas? __________________ ----------------------------------------- Current: 2009 Volvo S40 T5 Progress Thread: https://www.volvoforums.org.uk/showthread.php?t=271945 Previous Volvo: 2008 S40 SE Lux R Design 2.0D

Oct 23rd, 2017, 11:02	#2
Welton Premier Member Last Online: Sep 14th, 2021 17:03 Join Date: Feb 2009 Location: Market Harborough	Oh no that's tricky, typical routes for water entry vary and can depend on parking flat or on a hill etc. The rear light cluster can let in water on some cars and find its way onto the floor pan. Also the door seals and whether the 'splash guard' sheet within the door has been removed/disturbed. Be worth checking the scuttle drains at the bulkhead within the engine bay just to make sure the little rubber outlets are free from dirt (you can squeeze and poke them about) not sure on the Volvo but some cars let water build up at the bottom of the windscreen and then it spills over into the cabin via the ventilation system. Good luck! __________________ 2005 S40 T5 SE - Manual. Bilstein B4's. (For Sale) 2010 Citroen C4 1.6 HDi (bizarre Gearbox model). 2010 Renault Twingo (refreshingly simple) 2018 Infiniti Q30 1.6T Business Executive (what's this button do?)

Oct 23rd, 2017, 11:16	#3
domhart10 Volvo S40 Last Online: Yesterday 23:26 Join Date: Mar 2015 Location: Chichester	thanks yeh hopefully when it stops raining soon I will dive in and have a look. so just to add on that ... it looks like there is water in the centre door light as well up in the roof __________________ ----------------------------------------- Current: 2009 Volvo S40 T5 Progress Thread: https://www.volvoforums.org.uk/showthread.php?t=271945 Previous Volvo: 2008 S40 SE Lux R Design 2.0D

Oct 23rd, 2017, 12:32	#4
LizardOfBodom WowIcanwriteAnythingHere! Last Online: Mar 26th, 2024 16:05 Join Date: May 2016 Location: Dublin/Meath	I really hope I am knocking in the wrong door, but just to be safe make sure its only water and not the coolant. You probably heard some stories on internal heater leaking coolant due to plastic knee broken. Hope you find the source of the problem asap! btw - maybe put some protective foil over your CEM just in case its leaking that way, before you discover where the source is? edit - just understood the "water in light" part so its probably related to upper leak - in that case, how about the seal between corners of windshield and the pillar? those are known to degrade in age aswell... __________________ 2005 V50 T5AWD M66, Stage1 Hilton tune E-focus torque mount, E46 bi-xenon retrofit v2 , (also available in PDF form), DTSC fully-off mod, Brembo discs+ATE ceramic pads Last edited by LizardOfBodom; Oct 23rd, 2017 at 12:34.

Nov 9th, 2017, 16:36	#6
domhart10 Volvo S40 Last Online: Yesterday 23:26 Join Date: Mar 2015 Location: Chichester	Yeh I still haven't found or fixed it but I will have a check this weekend to see if that was the problem and update here __________________ ----------------------------------------- Current: 2009 Volvo S40 T5 Progress Thread: https://www.volvoforums.org.uk/showthread.php?t=271945 Previous Volvo: 2008 S40 SE Lux R Design 2.0D

Nov 9th, 2017, 14:02	#5
AndyMcc Member Last Online: Sep 27th, 2019 17:18 Join Date: Feb 2012 Location: Lancaster	It's the windscreen seal. Had the same problem. If you place your palm inside the windscreen and push out you'll probably see movement along the sealing edge. Not an uncommon problem

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