Hi all,

I have a 1970 122 and recently went through the pain staking effort of sorting the floor panels out. They needed rust treatment and i also put a couple of coats of bitumen on the floor panels to provide that extra protection.
Now just before i re-carpet the interior, i decided to do a 'leak' test by spraying water on the front windscreen as well as in the air intake.

I did this for a couple of minutes and carefully peeked into the car and to my dissapointment, i found the interior flooded with water.
Just as well i did not assume not to have any leaks and install new carpets.

Anyway, the ONLY place the water seems to be coming in from is from the heater box, the drain hoses both the small one at the bottom of the heater box and the large one in the engine compartment had been cleared prior to this experiment.

I removed the front ducting of the heater box and could see the entire heater box covered with water and the water is finding its way through the small crevices in the heater box.

Now was this a realistic test to conduct?
I mean i threw in at least 100mm of water from a bucket all at once and it would not take a rocket scientist to figure out that a small 8mm diameter hose on the inside of the heater would battle to get rid of that volume of water.
I understand that bulk of the water should drain out from the large hose but a significant volume of water is still entering the heater box.

Under 'normal' raining conditions such a large volume of water would not enter the heater box now would it?

Have any of you experienced this problem? If so, please help and advise what to do, be it a modification or a simple repair.

Also, how does one prevent water entering the doors?
Are the doors supposed to have drain holes, if so where are they located?

Thanks