About a month ago I bypassed the rear heater because of a suspected leak. It didn't leak for about 2 or 3 weeks. We'll the leak is back. It's clearly coming from the heater valve area, but all the hoses are dry. Leak comes down the passenger side of the transmission and often drops as far back as the crossmember. I'm beginning to think it's a crack in the head or maybe head gasket. No oil in coolant or vice versa and no bubbling in overflow. Radiator is new OEM. There's no overheating, pressure test on cold engine didn't reveal anything. The really odd thing I'm starting to notice is that it only seems to leak when the heater valve is closed (climate control set all the way to blue). I'm planning to bring it to one of the local Cruiser shops on Monday, but wanted to see if there were any ideas beforehand.