mk4jetta

This is the general area, blue flash light is shining on it.


This is a litte bit closer


Close up as i can get


I have already fixed one leak this weak, the plastic flange on the back of the block.

Then there was a puddle of coolant under my car in this area, with a pool of coolant right under this mystery round ball looking thing lol.

Is this the area of the after run pump?

gietl

Ralph

UrS4boy

Check the link out (inside). The after run pump is virtually in your hand in the middle photo.

https://www.audiworld.com/forums/sho...php?p=18871694

SchwarzS6

The after run pump is the cylindrical thing with the rubber at both ends just above and to the left of the business end of your flashlight in the first picture. The thing you are looking at in the bottom photos is part of the rats nest of crankcase ventilation hoses and not the source of your leak. I would suspect the after run pump.

UrS4boy

Crankcase ventilation system. It shows up in this 3B diagram at "11 o'clock" just above the crank position(reference mark)and engine speed sensors:

mk4jetta

Learn something new everyday with this car!
Guess ill have to take a closer look tomorrow.

Thanks for the quick input.

UrSobsessed

Make sure you check all of the 'weak links' in the cooling system while you are replacing things.

In these high pressure systems, when one part goes and you replace it, it's not long before the next weakest link will go, and so on...

eg. 'T' fitting goes, then the flange on the back of the block, then the after-run pump, etc...

Generally the plastic pieces and the after-run pump are the ones to go first.

mk4jetta

Ya I would like to replace it all at once, also want to get that 034 silicone hose kit.

UrSobsessed

If you do, make sure you get constant torque clamps for all of the connections.