car is leaking a clear substance, need help!

DrewDong

Hey everyone,I purchased a 2009 nismo few days ago, odometer had 15 miles on it, it now has 400. Anyways, after about a 25 minute drive, I get into my garage and turn off the motor. Then I hear a bunch of crackling noise underneath my engine along with a small thudding/clicking sound for about 30 seconds. I then look under my car, and see a clear like substance leaking in the middle of my car, but a tad more to the front. The leaking is coming from one of the pipes that lead into one of the exhausts, I think it is water, the temperature of it is kinda cold, but not freezing. I was using the ac on it as well during the 25 min drive, is this normal?