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Q & A: It only leaks when it rains

Hi John,

I got your e-mail address off of the NAMGBR tech tips website. I am also
familiar with your company's well respected reputation.

I'm seeking some advise.

I have a 1970 MGB-GT that accumulates water in the passenger compartment
when I either wash the car (a little bit of puddling) or if I get caught
in
the rain, which thankfully isn't too often, but can create allot of
puddling depending on the severity and or length of the storm. Until
recently I've turned a blind eye to it as when this does happen I can
usually remove the rubber floor mat and mop up with a paper towel etc.
However, I just finished a sound proofing / insulation project and
wouldn't
you know the car was out in the parking lot at work when one of these
massive deluges that we've been getting recently passed through. As a
result the insulation acted like a sponge and, well you can guess the rest
(Capillary action at is best!). I had to take the seat and all the
carpeting etc out to dry this time. As I write this I have a small fan in
the car drying everything out as thoroughly as possible.

Where is this water coming from? I am aware of the problem with that drain
tube from the cowl vent. I clean that 2 -3 times a year and I see no sign
of the water entering from the vents.

The water traditionally puddles along the side of the transmission tunnel
down by the radio housing and directly across from that by the map pocket.

Any thoughts?
Tim

Tim!

It's pretty odd for a BGT to leak so badly. The technique is to lie
in the car and have someone spray the garden hose on the car (can you do
that in California yet?) and find the leak -- a flashlight helps!read more