|When doing a job like i am doing right now (overhall cooling system & injection system), it's a must to change the oil cooler O-Ring wile the coolant and the water pump are out. So wile you have the coolant out (difficult to remove when attach to the 2 small oil coolant hoses) change the O-ring. I heard horror story about this one failing on the road.Note: the original O-ring was a “recall” by VW, it as a tendency to crack or fail at cold temperature.|
VW recommend the use of a sealant on the O-Ring side???, not sure about that. What I did is apply a small coat of Red 518 Loctite . Toque back to 18 feet / pounds.