I was having to put coolant in the overflow at least once every two weeks this winter, because of the flashing coolant light. I never found any coolant on the ground under my car and wasn't sure where it was coming from, until I looked and the coolant flange on the tranny side.
The red arrows point to where you can see some of the coolant leaking. It was worse on the backside of the flange, but difficult to photograph. Before you remove any coolant hoses get something to catch the fluid. I used a 1 gallon water bottle and chopped the top off, you can crush it to sit nicely on the tranny.
I remove the larger Coolant hose first and drained it into the plastic bottle. Do the same for the other coolant hose on the back of the flange. Remove the metal clips and pull out the old sensors one at a time and reinstall them into the new flange. Replace the old washers and clips. This is the sensor that faces the front of the car. The old clips are on the right, new ones of the left.
Here is the sensor on the top of the flange. Again old clips and washer is on the right and new ones are on the left.
You need to remove 3 nuts to free the flange once you have removed all the sensors and hoses. Then you need to wiggle off the metal bracket that attaches to the flange. Then you can remove the two bolts that hold the flange onto the motor. Here is what it looks like once you get he old one out.
You can't really see the coolant leakage on the bottom part of this pic.
Here is the new coolant flange with the sensors installed and clipped in.
Here is the new flange installed.
I changed the hose clamps from the pinch OEM VW type to regular screw type hose clamps. Then I recycled the coolant fluid back into the overflow. Here is the old coolant flange washer, you can see how flattened & crushed it is.
Should fix my leaky coolant problem. Hope this helps others out.
Modified by tjm0852 at 1:04 PM 4-9-2008
Modified by tjm0852 at 1:08 PM 4-9-2008