0:00 Right, so we've got this Audi A4 2017 model in for a water leak. There wasn't a huge amount of water in the car, but still enough for the customer to come in. So we've performed our 28-point check, which involves checking the most commonly leaked parts, and parts that we've found that do leak in general on cars. But nothing really on that 28-point check flagged up the leak on this one, which is quite a peculiar leak. If I show you around here, what's happening is basically there seems to be a hole in this rubber, if you can see that there.
0:42 Now this is the secondary rubber on the car, this is the primary rubber. And what we're seeing is, when we're spraying it with water, water seems to be able to get past the primary rubber. Now that's not a bad design, that's just what happens on the cars sometimes, and that's why you have the secondary rubber, to catch that water that does go past the primary rubbers. Now if you see here, obviously the hole, what we've done is sprayed water in the hole with a UVA dye in. And what
1:15 we've noticed is water is coming down the inside of the rubber, all the way down the inside, and it seems to be coming out of the rubber around here. Now, if I show you with a UV light, there's not much, but there is a slight drip there, if you can see it, that little blue bit, which I'm gonna point my finger at right there. That's a drip of water with the dye in.
1:44 So what's basically happening is, the water is managing to work its way onto this seal, going through that hole, and then gradually filling up the rubber, and creating a pool in the bottom here. Once that pool is created, then water is eventually flowing over and into the car, which is probably why we need to replace these rubber seals, obviously get one without a hole in, and that should sort the issue out.
Share this video