My car recently has been losing radiator fluid, but I had looked all over, and couldnt find any water coming out at all. It was taken to Pep-Boys and they said that it was losing fluid from the radiator because the head gasket was cracked (They tested the water in the radiator, and found that there was exhaust fumes in it). They said that this means that water was getting into the piston chamber while the car was running, therefor it should get fixed immediatly, and not be driven. The weird thing is that the car runs perfectly normal. No power loss, no missed fires, no steam (that I could see) from the exhaust pipe, NOTHING. Is it possible that they made a mistake? Has anyone here had a problem like this, with water getting into the piston chambers? and how did the car end up running? Thanks.