mougly Posted February 25 Share Posted February 25 With this drain, the little vent become useless or almost. Nobody really knows how the cavity fills with water : in dynamics, the little vent which is just at the level of the rear bumper undergoes an air pressure which causes the water to flow back and enter : the rear bumper captures the air which rises . This water is then stored in the cavity on the side from where it cannot leave because there is a rubber cap. The first step is to completely seal the small vent and install the drains. Quote Link to comment Share on other sites More sharing options...
Schmill Posted February 25 Share Posted February 25 49 minutes ago, mougly said: With this drain, the little vent become useless or almost. Nobody really knows how the cavity fills with water : in dynamics, the little vent which is just at the level of the rear bumper undergoes an air pressure which causes the water to flow back and enter : the rear bumper captures the air which rises . This water is then stored in the cavity on the side from where it cannot leave because there is a rubber cap. The first step is to completely seal the small vent and install the drains. Interesting, that's not what I found at all. For me it was quite clear that the water flows normal down the body and round the big side vent , you can see the dirty water marks in your photo. What happens often is the water gets past the flexible silicone seal around the edge of the vent and then flows into the body. Removing the vents and the drying and resealing around the edge of the vent solved it for me. The vents themselves have flaps on them that should stop any air (wet or not) from being pulled into the body cavity. 1 Quote Link to comment Share on other sites More sharing options...
Bxzx16v Posted February 27 Share Posted February 27 As above, I've had no issues since sealing around the vents. 1 Quote Link to comment Share on other sites More sharing options...
mougly Posted February 27 Share Posted February 27 My car is 10 year old and I've never had the carpet problem, only the sunroof seal. This is not my solution, but Ford's. I show you what was modified to prevent the water to ruin rear boot/carpet. In this cavity, there is no more foam or sound absorber. I think it is the capilarity that plenish water in the rear carpet. And imo, Ford's solution is easier. 1 Quote Link to comment Share on other sites More sharing options...
Acid House 1988 Posted February 27 Share Posted February 27 On 2/25/2023 at 6:18 PM, Schmill said: I think the drain tubes are good to stop the car getting completely saturated via the boot, but if water is getting into those side voids near the vents then the wadding etc in there is already soaked. I would add to that in suggesting that the drain tubes might also aid air flow/circulation round those rear cavities where the insulation is so even if the rear of the car is effectively "dry" or "sealed" it's an extra route out for any moisture that may build up for whatever reason. Just a thought. Quote Link to comment Share on other sites More sharing options...
mougly Posted March 5 Share Posted March 5 Good video witch explain how to : 1 Quote Link to comment Share on other sites More sharing options...
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