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ianstent

Water leak in spare wheel well

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Hi all,

Recently bought an M Sport E39 530d touring 2002. Loving almost everything about it but have just discovered a huge pool of water under the spare wheel. I have now managed to drain that out through the drain holes in the floor, which I shall reseal once the problem is cured.

I am getting some water ingress from the nearside of the car through, I think, the ventilation flaps behind the bumper sides, which are just visible from inside the car, behind the cd changer. How do I cure that, when they are designed to open!?

My suspicion however is that the majority of the water is coming from the offside, from beneath/behind the battery or fuses etc which are located here. Any suggestions where to look? My car doesn't have a sunroof and I don't think it's the rear lights (both highlighted issues when searching online).

The problem has obviously been happening prior to my ownership since the floor of the spare wheel well has paint peeling and is generally not too clever.

Are there's drains from the tailgate hinges and could these get blocked?

All suggestions welcome.

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You have already mentioned it but when it started with me it was cause I had changed the rear lights, tried using the better less deformed 'foam grommets' was a little better but final solution was some white silicon( very bathroom styleee). You can use a hose if its not raining to test just let a slow trickle run down the channel for the boot lid.

When drier weather comes in will get new grommets http://realoem.com/b...306&hg=63&fg=20 and see how it goes but for now its dry as a bone.

Edit just noticed you have a touring all of the above may well be bollocks :unsure:

Edited by dryjoint

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Cheers dryjoint

I had assumed the rear lights leaking problem was on the saloons only, but may be wrong on that (it wouldn't be the first time!).

Need to get in the car this weekend and have my other half carefully hose the car so I can hopefully see where it's coming in.

One other question, what's in the round case/box that the spare wheel locates on, and which has some cables going to it? Tried to open it today and the obvious bolts seemed to spin with the studs. It's pretty heavy, anyway.

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Hi Justin,

You're correct. Just been searching online and it holds the pump, solenoid and a reservoir for the self levelling suspension units. Since I've removed the floor panel in the boot to help the back dry out, I can hear a buzzing when I first start the car and I suspect that's the system priming or setting itself. It lasts for about three seconds before going quiet. Hope I haven't buggered it by unbolting the whole unit from the boot floor to dry out the spare wheel well! Also hoping it's not full of water!

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Long shot, but as you've got a Touring, does your rear washer work properly? I had a problem just after the first freeze of the year, the feed to the washer jet popped loose, so every time I squirted, some water dribbled down the glass, the rest pi$$ed all over the dogs :)

if its been happening for a long time it may just have collected in the well [groan - no pun intended!] and you may not have noticed.

The giveaway on mine was when I took the dog crate out and put the cover in place. Noticed a pool of water on the shelf, so managed to investigate and fix it.

Good luck

S

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Thanks for that. I had noticed this was another issue found by others online. My rear washer appears to work fine and wiper motor etc was replaced some time ago. Certainly the seals in this area need checking, and I'll double check the pipework etc at the weekend, but like the rear lights... I somehow don't think it's the culprit. There was SO much water in the spare wheel well that I doubt it's accrued from a leaking rear washer bottle. It's almost certainly as a result of me keeping the car clean and washing it too regularly (!)... something I've never done with previous cars! If I can find it I'll certainly let everyone know what it was!

Ian

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OK, I've spent the whole weekend working on this and, while the spare wheel floor area is rust free and repainted, and the body seam alongside the battery has been dug out and an offending 5mm hole filled and everything resealed and painted, I'm still getting water pouring in! Final investigation on Sunday night is pointing me nearer the problem... I think. If I spray the car with water there is no visible water ingress. However, it's only when on the move and going around corners that water comes in. Sitting in the back with my other half driving I can hear the water sloshing around in a void across the back of the car, beneath the rear bumper. On corners the water sloshes up to one end and comes into the car at this point. Mainly this happens on the battery side, but I also get a small amount coming in and sitting behind where the cd changer lies.

I really don't think this is coming in around the lights, but more likely is collecting somewhere behind the bumper, when I hose down the back of the car after having washed it. Has anyone investigated this area? Is there a panneled in void here where water might get in and then into the car via an inner mounting hole or something?

Very frustrated, but have just found an excellent thread on this forum on how to remove the bumper.

Ian

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OK, I've spent the whole weekend working on this and, while the spare wheel floor area is rust free and repainted, and the body seam alongside the battery has been dug out and an offending 5mm hole filled and everything resealed and painted, I'm still getting water pouring in! Final investigation on Sunday night is pointing me nearer the problem... I think. If I spray the car with water there is no visible water ingress. However, it's only when on the move and going around corners that water comes in. Sitting in the back with my other half driving I can hear the water sloshing around in a void across the back of the car, beneath the rear bumper. On corners the water sloshes up to one end and comes into the car at this point. Mainly this happens on the battery side, but I also get a small amount coming in and sitting behind where the cd changer lies.

I really don't think this is coming in around the lights, but more likely is collecting somewhere behind the bumper, when I hose down the back of the car after having washed it. Has anyone investigated this area? Is there a panneled in void here where water might get in and then into the car via an inner mounting hole or something?

Very frustrated, but have just found an excellent thread on this forum on how to remove the bumper.

Ian

Hi there Ian, I know it's been a while when you posted the message about the e39 water leak... I had the same problem, turned out to be where the boot seal sits on the frame there's a piece of metal that overlaps each over, that one place it came through. I had one coming from behind the bumper too and that was down the (RUST) when you pull the bottom half of the boot seal up, under the lip on the car there's a seam where the two pieces join up, both sides on mine were rusty and they were letting water through the skeleton of the car into my spare wheel well!!! As a temporary fix I'd used bathroom sealant and it sort of done the trick but just recently were having real bad weather and it was full of water!!!

Anyway it's off to a body shop who can replicate the whole seem thing and paint it at a cost of £350...

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