rhkwon

Guys,

I just removed my AOS (detailed removal write up to follow later) and noticed that the 2 coolant lines located on the sunflower face area of the AOS have no hoses attached to them! Obviously the AOS was previously replaced but the original hoses were never connected. And these 2 nipples were not blocked off/bypassed or connected together as mentioned in a Renntech post.

So my question is where do these 2 AOS coolant hoses go/connect to?

When I was pulling the car apart, the thin coolant hose that goes from the engine block cap (right below the alternator and connected to the joining socket part Number 99610622652) was connected directly to the 3 way splitter hose (which connects to the water pump and the expansion tank).

I'm thinking this coolant hose should originally be going to the AOS (right side nipple of the face) and then the left side nipple of the AOS coolant hose should be going to the connection on the 3 way splitter hose? I'm really confused now.

Car is a 1999 manual cab C4.

pdxmotorhead

Did they just loop the hose to bypass the AOS? Might have been done to limp the car somewhere and they replaced the AOS but didn't replace the hoses?

rhkwon

It very well could be the case. I could just hook it up the way it was but I’d like to get it back to its original configuration.

DBJoe996

Diagram and part numbers http://www.autoatlanta.com/porsche-p...section=104-10

rhkwon

Thanks DBJoe966. Where does the intermediate fitting #16 attach to? Does this attach to a shorter coolant hose that attaches to the 3 way splitter hose? I can’t seem to locate the parts diagram for this particular hose.

Ahsai

Very simple. One hose connects to the easily broken plastic piece on the right side of the alternator. The other connects to the T split coming off from the coolant tank.

rhkwon

Thanks Ashai. That’s what I thought.

Both of these hoses attach to the AOS in back correct? Basically the alternator side hose goes to the AOS fitting on the right and from the second AOS fitting the hose goes to the T split.

Ahsai

Precisely.