Coolant leak while changing spark plugs

[jdgden]

I just hit 100k miles on my 02 4.4 and changed my spark plugs today (Bosch). I did the left side first and really had to crank on the first few plugs to get them out. I was done w/3 plugs when I noticed that a small puddle of coolant had dripped on the floor below the coolant expansion tank. Not good, I thought to myself. It looked like the leak started somewhere below the expansion tank, but I could not see exactly where the source was.

I suspect I knocked a coolant hose/fitting loose, but it only seemed to leak that one time. No leaks after so far and I have driven it several times already.

Could I have hit a fitting or seal that popped back in place? It seems odd that it doesn't leak anymore, but I'm just waiting for my temp needle to spike and find a gusher in the engine compartment. This forum has me paranoid about spontaneous leaks.

Love the X5 but extended warranty has been key to owning it - a major transmission failure last year, problems with self leveling, front suspension/steering repairs, seat heater replaced, and so on.