for the first 5 minutes or so after I start my 98 Civic, there is a vibrating noise coming from under the front of my car. In previous cars, the culprit has been the head shield which I have easily removed. The shield for this car is long gone so it can't be that. The noise seems to go away after about 5 minutes.
Any ideas what it could be? My guess is that something with the exhaust system is loose.
Thanks