Unlucky for some 13 potential water leak areas.

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eddypeck
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Unlucky for some 13 potential water leak areas.

Postby eddypeck » Thu Dec 04, 2014 1:26 pm

There's a whole bunch of common places where water can get in, most Mk2 owners will be able to tick off at least a handful of these at one time or another. This isn't supposed to be a guide on how to solve each problem. It’s just to give you a start on where to look. There's plenty of info on fixing each of these on the forum. Please feel free to add more as you find them. I'm sure there's plenty.

1. Sunroof seal, often thought to be the main culprit but this is not 100% watertight anyway. However if it's totally gone, in heavy rain more water gets past it than the drain tubes can cope with and let water into the car, potentially damaging the headlining.

2. Sunroof drain tubes, this is the main culprit of water from above. There’s one in each corner and they get blocked and need to be cleared so water can run away freely. Check the spouts or sunroof gutters haven’t rotted away also. Combined with a new seal your roof will be leak free.

3. Inner wing drain holes, these get blocked with leaves etc so water collects in the scuttle and backs up into the car through various points…

4. Blower motor fresh air intake, see item 3. Remove grill, clean and reseal in conjunction with doing the above.

5. Bonnet release cable grommet, in the scuttle, see item 3.

6. Scuttle panel/bottom of windscreen, these rot. Any sign of rust creeping out from under the windscreen seal it’s worth taking the screen out to check it out.

7. As above, but without removing the screen you can sometime see by just removing the dash speaker grills to see the corners. Or remove the dash to check the full length of the scuttle.

8. Heater matrix, water in the footwell may not be rain water. Check it for coolant it could be a leaking heater matrix

9. Door membranes and window scrapers, as with the sunroof seal water gets past the scrapers. There are drains in the bottom of the door, make sure they’re clear. Damaged or missing membrane will ruin the door cards and let water into the car. Yacht Varnish the back of your door cards for added protection and strength.

10. Door seals – if water still gets with the above addressed it could be door seals, or door fitment. The doors can drop and not shut properly leaving gaps for water to get in.

11. Rear light seals, the rubber around the rear lights can let water into the boot.

12. GTI spoiler screws, there should be rubber seats for the fixings, if these are perished or missing water can get in.

13. General rot; A-pillars, inner wings, rear turrets, floor pan, bulk head …. There are quite a few common rust areas that are potential areas where water can get in.

Admin, can you sticky this please?
Last edited by eddypeck on Sat Nov 26, 2016 9:51 am, edited 1 time in total.
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eddypeck
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Posts: 9524
Joined: Thu May 23, 2013 1:29 pm
Drives: 1986 MK2 Golf GTI 8v
Location: Bristol, UK

Re: Unlucky for some 13 potential water leak areas.

Postby eddypeck » Thu Dec 04, 2014 4:31 pm

Thanks to James827 for this:

14. leak in the rear boot? check the boot lock seal and all the screws and plastic things that hold in the plinth and number plate lights are there! one plastic screw guide missing can cause an annoying leak, also check the bottom of the rear screen and all along the sides on the inside of the boot-lid, it can be overlooked and could well be rotted out.

Check around the rear wiper, squirter, bottom of screen for rust especially on a GTI where it can be hidden under the sticker but water can still get through.

Also if you're rear washer doesn't work don't just presume it's a blocked jet or faulty pump. You could well have a break in the pipework and every time you try it you could be pumping water into your car....
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Wingchundub
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Drives: MK2 Golf 1986 1.6GL
Location: Manchester

Re: Unlucky for some 13 potential water leak areas.

Postby Wingchundub » Mon Dec 08, 2014 8:34 am

15. Wiper grommets especially on earlier type 19 due to wiper being on passenger side.
Water was coming in and I assumed the scuttle with splits.
Fixed them and spotted water coming in via grommet which then drops onto linkage arm directly above blower and can see water trails in fan housing.
Silicon applied and she has been dry ever since
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