leaking fuel actuator?

[barf]

'08 CM871 with original never touched actuators, metering valves and fuel pump, 1.5 million miles. Haven't even ever taken them off to do the 'bubble' test.

I'm up in the deep freeze in Canada. I have winter diesel in my tanks, but not knowing how much my next load will weigh I'm only sitting with 1/4 tanks. My truck spent all day Monday inside a shop; Tuesday my truck ran for about 5-10 minutes then stalled out. I guess my tanks got too much condensation in them and my Davco filter turned to ice. Wednesday (yesterday), after changing the filter, adding possibly too much fuel conditioner, tarping the hood, and putting lots of heat underneath, I was able to get it started. It's 30 below here. I let it run for about an hour and all seemed good.

Now noon today I started it, still 20 below here, and there was a fuel leak coming from underneath the left actuator. I didn't closely examine it while running to see if the leak was from somewhere else and running down and dripping from the actuator. I quickly shut the truck off and removed the actuator. I see nothing physically wrong with it and hate the thought of parting with a few hundred dollars only to find something else was leaking.

I decided to put it back on as is, and now the truck doesn't want to build fuel pressure and start. My wife noticed fuel dripping from behind the engine when I was cranking it over. I have to go back out and look for where this leak is from while she cranks it over, but I'm inside warming up right now.

Enough of all this yapping; question is can freezing up a system do damage to an actuator? The gasket looked fine.