Two cars, 91 740 wagon and 94 940 sedan. They are not currently losing coolant, and the 94 has the heater core bypassed anyway as the new core seemed to be leaking.
Heavy rains recently here, so...
91 I'm pretty sure has stopped up sunroof drains so I"ll pursue that. Speaking of which, I have diagrams but do not see exactly where the drains come out at the bottom. Details anyone? I reviewed the FAQ but do not see that the rear drains are behind the rear wheels.

The 94 has major wetness in the rear pass side, the front is mostly dried up after the new core leaked, but the rear floor is positively soaked. This car had some rear end damage on the rear left corner before I bought it, but that seems to have been relatively minor. The doors on the right side seem to work fine. There is a small area on the pass front door where the seal has come loose along the top, about 3". The door is not wet though. Could this be sunroof related? It fits well, works well, and there is nothing wet up there now.

Edit; The area seems to be at the base of the pillar between the doors and slightly inside of that, maybe 12 sq in. The rest of the rear floor is not really all that wet. It def seems to be coming from that pillar, so ???

My plan is to take an air tank and blow up through the drains, once I find them.
Comments?