Help! 98 (99k miles) Ford Escort Wagon Cold Engine Noise

engines
noises

#1

Only hear it when engine is cold. Sounds like metal grinding/vibrating noise. Goes away after 2-3 minutes. Engine runs ok after that. Never hear it again until next day. Double checked around belts, nothing loose. Changed timing belt and water pump two month ago. Not sure if the noise was there before that. Bad tensioner? Engine mount? Please help! Do you think this is serious? Thanks. You can hear the noise here at 3, 7, 9 seconds: http://www…QwWAY7bogI