My sis drives an 02 1.8T Jetta. Anyway a few months back she bottomed it out pretty bad. A couple of weeks later and the coolant all backed up and blew out of the overflow tank. So i refilled the tank, checked for leaks and it ran fine.
Only issue was the car kept misfiring. So i replaced 2 of the coils and the misfiring subsided. Last week she finally had the money so i replaced the other 2 coils.

Well now that it is firing on all cylinders the problem has returned. Every time the car is running air will bubble up out of the coolant overflow tank taking all the coolant with it and the car overheats. Plus there is a crap load of coolant in with the oil. I'm suspecting that there is a crack in the cylinder wall, or maybe the head gasket is toast. Does anyone have any other ideas?

 

is there any milky color in the colant or oil???

 

VW water pumps suck, just for future refrence.

 

Sounds like head gasket.

 

when the car is cold pull off the small hose that goes to coolant bootle and start the car and rev to like 2000 rpms if no coolant flows from that hose replace wather pump. If you got flow pm me i wil try to help.

 

Your sister cant read or listen..and should be slapped hard in the face...
Now Correct the factory water pumps suck the plastic impelers crack and break off causing overheating....Replace with a proper metal impeller pump...also replace the head gasget ..because your sister is Hellen Keller....can't read cant hear...
can't read the coolent temp gauge pegged hard to the reight........the 1 inch high red letters in the center of the gauge cluster reading STOP
with a loud audible beeping.....so she kept driving......take the car away and make her walk

replace the timing belt while your in there before she needs a head as well