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Newbie - Yet Another Leaking Aygo


ldr
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Hi everyone,

I'm new to this forum and new to Aygos (and cars infact!). I recently bought a used 2006 Aygo.

I've had it about a month, and have recently noticed water in the passenger side of the boot, and the back passenger floor.

Now looking at the site, there are lots of holes that need re-sealing, such as brake lights, high level light, boot vents, boot glass buffers, door panels, aerial, etc etc

I am going to have a go at fixing these using the tips and tutorials on the site (hoepfully it will save me moneny, and I can learn more about the car).

However, I have a few questions, that I could do with some advice on before I get started:

1. Rear light clusters - removing sounds easy. But with regards to using silicone is it put onto surround of hole from outside (not inside)? Should the light then be re-fitted before the silicone sets or wait for silicone to set?

2. High Level light - can someone give me rough dimensions please, I'm at work at the moment, and I need to buy some foam to re-seal it.

3. Can someone post a tutorial to remove the bumper?

4. With regards to silicone presumably items need to be pushed together before it sets?

I think thats it for now. I'll probably have more questions when I start taking it all apart!

Thank you in advance

lewis

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Thanks for that Frostyballs. I've already been through that lot, and its going to be very helpful.

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The later boot seal seems to work.

Thanks i'll give that a try if i find its that. Wheres the best place to get one?

Any tips on getting the bumper off, if I need to go that route?

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As regards the seal, send Parts King a personal message detailing your car and what you want - see the Community page, Sponsors Corner and Lindop Toyota.

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Removing the rear bumper is a bitch, You can find instructions on AIM TP400.

If you decide not to have a look at these suggestions

As we all know, the 107, c1 and Aygo triplets can be prone to cabin water leaks. Older cars seem worse, and the Aygo in particular can be very bad. I believe that this is because virtually every exterior piece of glass, lights etc are all different on the Aygo.

Terminology:

Weatherstrips - often erroneously referred to as 'seals', they are the bits that go around opening apetures, such as tailgates, doors, etc. Many Japanese manufacturers refer to these as 'welts'. Pieces such as the trim at the bottom of a wind-down window are sometimes also referred to as weatherstrips.

Seals - usually found around fixed items, such as windscreens etc.

Some manufacturers use other terms, and individual components can often have some bizarre names (such as 'poser mouldings' on Nissans), but I will be using the terms weatherstrip and seal to mean as described above.

Some common points of water ingress, and potential cures:


1) Tailgate weatherstrip - water ingress through here is not terribly common, but can happen. Ensure the 'strip is undamaged, and seated firmly and evenly all around. So some small extent you can remove it and refit it correctly, but it contains a metal strip around the inside to help it keep its shape so if it is that bad a new one is your best bet.

2) Rear lights - quite common on older C1's and 107's. Underneath the rear light clusters is a small foam rubber doughnut seat that protects the light wiring and seals the hole that goes through into the bodywork. Provided the seal is still in reasonable condition, try smearing a thin film of sealant over each surface. New seals are now available on their own - they were previously only part of the entire light cluster - but you could probably fashion your own quite cheaply from any medium density foam type material.

3) High level brake lamp. Very common, and so obvious it is often overlooked. The seal is dreadful, but removal of the light, a thin film of sealant, and refitting usually cures it. While the light is off it is best to ensure the hose to the washer nozzle is still in place, as if this pops off it can also leak into the rear cabin.

4) The radio antenna can leak, especially on older cars. Later models seem to have a slightly different design to the base and don't seem so bad. Pop the interior light off the reveal the 10mm bolt head. Undo, and the aerial pops off from above. A thin film of sealant and refit of the antenna should cure this.

5) Door weatherstrips. As per the tailgate weatherstrip.

However, while the 'tailgate' advice is relevant, there may be a further problem for Aygo owners.

This can be a very bad leak point on the Toyota, and some dealers try desperately and without success to cure these leaks. Things are so bad that Toyota have introduced a warranty bodge, involving the fitment of a self adhesive secondary seal, which itself does not always do the job and often falls off once it gets wet...

In late 2010 Toyota redesigned the profile of the sill and the door weatherstrips and this was supposed the cure this once and for all. It hasn't made a jot of difference. So much to Toyota's superior fit and finish, eh?

Follow the 'tailgate' advice, but if you own an Aygo with a troublesome leak that won't be cured then you may have to accept there is possibly a fundamental design flaw somewhere and there may be little that can be done. Whoever finds the definitive cure for this on the Aygo will be a much loved and wealthy person!

6) Windscreen base - this mainly affects Aygos, and the only cure is to have the screen professionally refitted.


7) Stick your head in the boot and look down. On the inside of the rear panel is a black plastic vent, possibly partially hidden by the carpet trim. On later cars this 'vent' is just a big hole the size of a mobile.

Ingress through this vent has occurred in a few case, especially C1's for some reason. I have heard of dealers simply filling the slats of the vent with sealant. A neater solution would be to remove the vent entirely and to rivet or seal a plastic or alloy plate over the aperture.

8) Underneath the car on the spare wheel well are some black plastic bungs. If these are loose, poorly fitted or missing, then water will get in. New bungs, and/or a dose of sealant will cure this.

9) Aygos with Speakers in the front door can also leak from around the Speakers. I have never personally come across this, but logically I would remove the door card and look for any damage to the interior membrane, or any areas where it is poorly fitted, and look to repair or reseal it.

Sealant:

Silicon sealant excretes water as it cures, which can then become trapped against the panel or item you are sealing.

Therefore, if using silicon sealant you must make sure that the panel is properly protected with paint, and any chips, scratches or corrosion are properly repaired beforehand or the sealant will case merry hell. Wurth silicon sealant is expensive, but nice to apply and can be peeled back in the future if required.

The bitumen type sealants are technically more appropriate, but are messy to use.

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Thanks guys, thats a great help!

Sorry newbie question, whats AIM TP400?

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It's the Toyota database TP400 is the bumper removal but be warned it is not for the feight hearted.

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lol...ok thank you...

What is the Toyota database? the Manual? Where is this?

Sorry for the questions.

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