Question about 1991 Peugeot 405

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I can hear water sloshing around at the left hand side of the dashbord.Checked the drain at bottom of windscreen not blocked.No sign of water dripping.

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  • yadayada
    yadayada May 11, 2010




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The 405 is renowned for having the heater matrix go bad and often it springs a leak woth an associated slooshing sound. Heater matrix is like a mini radiator which is fed by water from the engine and is located behind the dash.

It is located on the lower left hand side of the dashboard. If you look under the glove box and in towards the direction of the centre of the car you will just about see it. Check the area around passenger floor and closest to the centre console for any dampness on the carpet or signs of leaking. If this is evident you have found your problem.

One solution is replacement from breakers though companies can be found who specialise in radiator repair and if you can find one in your area this is an even better solution.

Slooshing water noise like you describe is sometimes associated with impending head gasket failure but I would check your carpets first for dampness and eliminate the heater matrix first owing to it being a known failure point on the 405.

Hope this helps.

Posted on Jun 25, 2009


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When first driving forward there is a sound of rushing water heard from passenger front firewall area. is there an area that water can be trapped.

Yes there is. When your a/c runs it creates condensation which collects under the evaporator in a small collector, and then drains onto the ground. This is the puddle of water you will see under a parked car if the a/c has been running. If the drains are blocked the water will not drain away and you will hear water sloshing about. If it gets too full, the water will overflow and you will get water onto the front mats and you might get wet feet. You will need to find the drains under the car and clear what ever is blocking them. It is usually road grime and dirt. It might also be the drains at the front of the windscreen are blocked, although this usually wont end up in the car.

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Sounds like water is sloshing around behind the dash

possibly is
at the bottom of the windscreen there is a plenum chamber that collects the water from the screen and drains it out via a tube either side into the front wheel wells
these drains can block up from leaves , dirt or rust and that will then retain water in the chamber giving you the sloshing noise as you drive
the chanber is where you normally get fresh air into the vehicle when you open up the fresh air control

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I hear water sloshing around in the dash area of my 2007 grand prix. i assume the water comes off the windshield but do not know where the drain is to unclog

You shouldn't hear water sloshing around anywhere. Usually when water comes of the windscreen, it runs to the sides of the scuttle grill and then exits via the guards (fenders) and out on to the road.
The drains are on the left and right sides of most cars but usually you need to remove the inner guards to get to them. Once you find them, you'll need to probe them and remove the junk out of them.

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Where is the rain drain plugged? Fresh water is dripping on feet - passenger side. Can hear it sloshing around when making a turn.


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Looking to unclog the a/c drain hose/tube; no water anywhere in the car but when making turns sounds like possible water sloshing around.

Look around the firewall for flaps or holes that are blocked at the bottom.

Rain water or wash water accumulates in the body and sloshes around.

Debris can block the drainage holes, just like in a gutter.

Good luck to you on this one.

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I have a 2003 Volvo S60 that ends up with a wet carpet in front of the passenger seat whenever it rains (Seattle). Also, when I am driving and turning left or right at corners, I can hear water sloshing...

The drain for your A/C may be clogged causing the water to accumulate. You should be able to locate the drain from under the vehicle on the pasenger side, perhaps there is an accumulation of debri such as leaves for example. Also, sunroof drain may also be blocked. I can say I have seen this problem before, and its a good place to start. Good luck

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Water sloshing in dashboard

It won't be in the dashboard it will be in the scuttle tray because the drains are blocked.

Lift bonnet, right at the back of the engine bay at the base of the windscreen you will see plastic cowls. The scuttle area is beneath these, there will be a drain either side. It is common for cars parked near trees to get leaves block up the scuttle drains. If you clear them obviously the water will escape... problem solved.

Do this ASAP, if the water level goes too high it will pour in through the heater system and possibly cause damage.

Hope this helps


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Water leaks into the vehicle on the front,

It could be a plain old fashioned leak around the windscreen - difficult to find but try sitting in the car while somebody plays a water hose over the windscreen.

It could also be a blocked drain in the ventilation system - fresh air is normally drawn in to a car via vents at the bottom of the windscreen. These vents normally lead to a "box" like structure where any water that enters the vents drops to the bottom and then drains away via a short hose that runs to somewhere underneath the car.
If the drain outlet or hose gets blocked (by leaves for example), it can cause the box to fill with water to the point where it can leak out in to the passenger area.

Hope this helps you find the problem.

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The roof drain tubes are clogged. Look at the front corners for debris blocking the drain tube holes.

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