Ok, so i have a 2005 jetta Gli and had a friend put a new head in, and everything was running fine, i went to get a coolant flush and a oil change, they discovered that there was oil in my coolant, and replaced the coolant resivor did the flush and changed the oil. So about 5 days pass and my car starts to overheat, so i popped the hood fans are working and coolant inside, but still over heating.. and now all my coolant is gone.. if anyone has any advice i would love to hear it.. thanks