It is a 6mm line although I used a 5mm line because I did not have any of the proper size. Be careful when removing the 3mm lines off the T portion of that. It is just a poly fitting and the lines will be stuck to it. Just pulling on the lines with stretch the leg of the T fitting, rendering it useless. The local VW dealership will not carry that part and it is so odd that no FLAPS or hardware store had something the exact same size. Carefully score the tube with a utility knife.
The sound probably came from the vacuum reservoir refilling with air as said above. It is a good sound to have heard, meaning no vacuum leaks in that circuit at least.
The sound probably came from the vacuum reservoir refilling with air as said above. It is a good sound to have heard, meaning no vacuum leaks in that circuit at least.
