I have a 1997 Honda Civic EX, when accelerating, there is a rattle or a sound like cardboard stuck in a fan coming from under the hood, could this be coming from any of the work i had done? if not, what could it be?
YES !! If the noise was not there to begin with and now it is there. More than likely the timing cover was not installed properly and it is now rubbing. Won’t affect the drive-ability of the vehicle, it will just be noisy. Take it back and politely ask the manager to listen to it as you are concerned. ( remember he is just a person just like you ) If he acts like an ass, then yeah scream and yell, but I think you will find that your mechanic will be more than willing to take care of the issue. If your mechanic is not, it may be time to look for a new one.