My '04 Enthusiast was in a fender bender and had some front end damage. The hood, front bumper, radiator and A/C was replaced as a result. Now everytime I start up the car, I hear the sound of water rushing through my dash. There are no leaks either inside the car or on the floor, but just a gushing sound in the first few minutes of driving and occassionally during highway driving. The sound does not last long but is very apparent. Has anyone else experienced this problem or know what the cause of this is?