730, M30 E32 1992 heater - water leak

730, M30 E32 1992 heater - water leak

Hi

Looking for advice.

I have a water leak into the car from the heater. It can have only started
a
couple of months ago when I topped up the coolant. A thing i do not
normally have to do.

I now have noticed damp under both from mats, worse on the passenger side
and the vent to the rear seats when opened water can be heard and I have
drawn some off today with a tube and it is coolant. I am not really a DIY
car mechanic [but do have a haynes manual] the car is 1992 and does not
warrant going into a garage which is 80 miles away.

I feel that the heater radiator has sprung a small leak and over time has
collected in the area. I am wondering if a radiator leak sealer would stop
it - would there be any harm in trying. I only do about 1000 miles per
year
and only local. Would this be easy to check by taking out the glove box?

Any advice would be appreciated. Even if this is a short fix - that would
be
ok - i could clean the carpets etc. Over 2 months the water level has
dropped by about 1.5" down the filler but not brought up an alarm.

Any advice would be appreciated. 

Thanks