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MG MGB Technical - cabin water leaks

Hi

Decided to remove the seats carpets etc from my gt in order to de-rust and paint the floor. While it was parked on the drive with the front pointing up and the enevitable rain shower I discoverd that rain water 1/2 pint overnight!)had made its way under the wing to body joint and them into the cab. The car had some previous restoration work done which included new front wings.
Should this area be sealed when bolted together or should it be sealed afterwards?
Are there any other water entrance points that you guys know of that I can attend to while the cab is empty.

Thanks gary
G Roberts

I used seam sealer when I installed the wings. I would think it nearly impossible to make a seal that would look good without doing so when bolting together.
Greg Bowman

Seals under the windscreen wiper posts.

~Jerry
Jerry Causey

The only way water could get in through the wing to body joint is via the bolt-holes or if there are holes in the panel below the screen. The more common points are washer holes, wiper spindle holes, heater inlet because of a blocked drain, and possibly via the gutter round the bonnet opening because of missing screws/seal round the master cylinder cover.
Paul Hunt

My roadster leaks water through the rubber seal between windsheild and windshield frame. I doubt the GT is much different in this area. In a good rain, you can see it. Inside the car, in the very corners (bottom) of the windshield, you can see a wet streak.

The water makes its way to the floor by way of the space between the side of the dashboard and the door. About the place where the windshield bolts to the car. It drips onto the sill level with the front of the door.

Hearing this is tied with heater for toughest repair, I've been putting off replacing the rubber. I did buy some 3m windshield sealer, but haven't gotten around to putting it in.
Matt Kulka

Matt
“My roadster leaks water through the rubber seal between windshield and windshield frame.”

I had the same problem, drivers side, water would drip onto my legs/feet which was caused by a faulty (ripped) seal. I taped off the surrounding area’s and shot silicon between the frame and the seal. 2 years later it is still working. And next time I have the windscreen off I will replace the seal.
Hope this helps.
Bruce

Bruce,

Thank you for your comments. I tried a similar fix, but laid the silicone down on top of the seam between windshield and seal. I should have shot it inside and in the space between the seal and frame as well. You did both of these, and got it right the first time. I wish you were around when I was trying my first fix.

I'm waiting a bit, because to do the job right I'll have to remove that silicone. A nasty little job, not made better by the choice of working in the 90 degree North Carolina sunlight or the sauna which I call my garage. I should get to it around October.

Matt Kulka

Yeah, my '77 MG leaks unto my left leg too.
My first '65 'B' did too.
I have tried sealing everything, but never have cured it.
That is left hand drive car, my left thigh.
If only?
I'm ready to actually ready to pay someone to repair this!
But have never found anyone who knew definately, what to repair.

Now if you want to talk hot? Even in Minnesota it gets hot and humid. 100% humidity, and 90 + degrees aren't uncommon.
My son Jon, the one that went bad and bought a Porsche, got tired of working in that environment and bought a window A/C unit with 12,600 BTU's.
What a son!
Safety [cool] Fast
Dwight McCullough
Dwight McCullough

Comma Seek'n'Seal is very good for windscreen leaks, being a very thin liquid that seeks out (hence the first part of the name) crevices then goes sticky to seal them (hence ...). Being sticky it also doesn't harden and crack and open up the leak again. The problem is that the leak can be almost anywhere round the rubber seal, it just exits at the bottom corners.
Paul Hunt

Paul,

When I went after the 3M windshield sealant, I was told the same, that it was thin and seeped deep into the cracks. However, what I found was a product dispensed from a caulking gun.

Thank you for the brand name. I'll check to see if that exists on this shore. That sounds much more like the product I need.

G Roberts,

Sorry for taking over your thread. I hope this extended discussion is helpful to you as well.

Matt Kulka

This thread was discussed between 01/08/2003 and 05/08/2003

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