Thanks to you all who helped me understand the water separator. That really helped.

For two days two weeks ago I could smell coolant in the cabin of my '86 SDL while I drove the car. I hadn't touched the cooling system of late, turned the heater on or off or anything like that. I had a pressure test done when the car resided in the shop all of last week (I was having that front end work done, ) They did a pressure test and didn't find anything. It had stopped smelling the day before I brought it in (of course) and didn't smell yesterday when I drove it several times.

Intermittant stench? I don't get it. Anyone? Anyone??