I noticed that when the H2 is cool a water coolant leak start to occured. When the vehicle is hot it goes away. I have to refill the reservour once a week. I took the vehicle to several mechanics and could not find the leak. They pressurized the system and yet no leack found. Any idea are welcome?????
Thanks, John

 

A water pump going bad can leak one day and not the next. If you look at the water pump you should be able to see a stain where the coolant leaked if that is the problem. If you dont see any external leaks on the ground I would suspect a leaking intake gasket.