Hey Scotty, I have a RAM 1500 with the 3.6L Pentastar. It developed a random coolant leak about a year ago, somewhere around the water pump. Had it pressure tested by the dealer but they couldn't make it leak. I can't reproduce it on demand either - it's only happened 5 times in the last year. It has been occurring on random startups, but I noticed last week it leaked again without ever starting the engine when the weather changed from warm to cold overnight. Any ideas? Thanks!

Forgot to mention, it leaks about half a cup each time, so it's not just a drop or two, but it also doesn't require topping off the coolant... yet.

replace the water pump, they leak and stop leaking as they age and often leak only at high rpms