I recently got my younger brothers 1996 Subaru Legacy brought to my place because he lost his license. He did not take good care of this car at all, like everything he owns. I have been tuning it up and trying to get the car to run better. I noticed that when I start to drive the car there is white smoke that after a comes from the tailpipe. It usually goes away after a few minutes of driving. Any ideas on what I can do to find out if I have a blown head gasket or something of that nature?