A coolant leak may develop after oil filter replacement. The coolant o-ring seal can be damaged if the oil filter housing turns when removing or installing the oil filter. The recommended procedure is to hold the filter housing when tightening or loosening the oil filter.Google+
Car Problem Reports
Volkswagen Jetta Coolant Leak From Oil Filter Housing O-ring
Volkswagen Jetta Problem
Engines Affected: 1.8L 4 Cylinder, 2.0L 4 Cylinder, 4 Cylinder, 6 Cylinder
Average Mileage: 123,750 mi (99,000 mi - 173,000 mi)
Visitor, 1998 Volkswagen Jetta, 2.0L 4 Cylinder, 99,000 mi
Coolant is leaking, needs to be refilled once or twice per month.
Visitor, 2003 Volkswagen Jetta, 2.0L 4 Cylinder, 120,000 mi
I have to add coolant every two weeks.
the car run hot when I stop at Red Lights, and drving slow. The water Pump, thermostat was replace.