Vacuum diagram

[Stl-986]

Anyone have any pictures of the vacuum lines on a 2000 2.7 with tiptronic? Half mine were missing and I can't find any pictures of the entire system

Thanks

[dghii]

I've seen it lately on this forum. Search on "secondary air injection"

[itsnotanova]

Try pelican parts website help area. I know they have some diagrams in their book and everything in the book is on their website

[78F350]

Sort of like this:


Don't get wrapped up about 3-way & 4-way connections. What matters is what is connected and what order they are connected in.

One source for SAI, flapper, and transmission cooling line.

Check valve to:

Vacuum reservoir
Changeover valve to flapper.
Changeover valve to SAI valve.
Changeover valve (23) to water valve (12).

One source for Fuel pressure regulator.

One bigger source for brake booster vacuum with venturi tube:


Simple. Ask questions from there. Need more labels?

[Stl-986]

78f350 -. Thanks a bunch, that is the best picture I have seen so far. That should get me going

[jadeb0x]

99 2.5 Tiptronic // My 1st Porsche

So I went to clean out the throttle body, since I was already replacing the AOS and coolant reservoir tank. I wasn't aware of the SAI vacuum lines when I started and only noticed them as I was putting the TB back together. I was able to figure out where 3 of the 4 connections went, however as I continued to search, the 4 way adaptor snapped. I still can't figure out where it is supposed to go.

I drove the car from Houston to Atlanta, I didn't notice much problem. Since then the car has been sitting until major maintenance has been completed. It was passed on to me from my family, so I know some history of it.

I have been doing some maintenance things, and prior to all of this I have noticed a coolant leak coming from the heater valve (12), and was planning on taking it to a local shop to have that part replaced to fix that suspected coolant leak. The transmission of this car had already been replaced 5 years back, and the IMS was not done. RMS has been done. Looking at the receipts, there has always been a slow coolant leak as it was filled often. Hence my reason to replace the reservoir tank as I read it to be a common problem.

As I searched these threads, I think that when the transmission was replaced, that the SAI vacuum lines weren't reconnected properly. Is it possible, that if they weren't connected correctly that it is causing the heater valve to leak coolant as the valve won't close due to no vacuum? The coolant leaks immediately after starting the car, but not when off.

Any other long term effects I should be aware of if the vacuum lines aren't correct?

I am not sure how the vacuum lines should go, I posted a pic of how I replaced them on my best assumption. Seeing if anyone could give me some input before I drop it off at the shop soon. Thanks!

How I routed the lines for now 1. passenger intake coupler, 2. canister, 3. electric change over valve, 4. ??? (currently broken so I used electric tape to cover hole for now)


My broken 4 way adaptor




(12) 928.574.573.03

[jadeb0x]

[Stl-986]

The pictures/diagrams above will show you exactly how to do it. Pretty straight forward with the picture.

[jadeb0x]

Originally Posted by Stl-986

The pictures/diagrams above will show you exactly how to do it. Pretty straight forward with the picture.

Been trying to follow it, however is part number 18 above two different switches or just one? I am assuming two, but I can’t find where the 2nd (18) is located.

[Stl-986]

2 changeovers are under each intake. If you have a tiptronic there is also one right above the belhousing by the AOS

[78F350]

A coolant leak would not be caused by a vacuum leak. A part which contains coolant is faulty, most likely the valve #12. It's not an uncommon fault these days.

Here's your pic with some comments.


and here's a picture of a kid mashing roots at a small village along the Rio Patuca ~1994.

[ike84]

Originally Posted by 78F350

A coolant leak would not be caused by a vacuum leak. A part which contains coolant is faulty, most likely the valve #12. It's not an uncommon fault these days.



Here's your pic with some comments.





and here's a picture of a kid mashing roots at a small village along the Rio Patuca ~1994.

This, right here, is what the internet was invented for

Sent from my SM-G970U1 using Tapatalk

[Starter986]

Just throwing this out there...

Is any leak asociated with the vacum associated with the coolant valve that sits upon the top of the Tip?

[78F350]

Originally Posted by Starter986

Just throwing this out there...

Is any leak asociated with the vacum associated with the coolant valve that sits upon the top of the Tip?

The vacuum opens and closes the valve based on electrical input to the change over valve. It's been a while since I had the valve in hand, but if I remember right, the valve is open (flowing coolant) by default and is closed by vacuum. It could be the other way around. The point is that the vacuum just opens and closes the valve (928.574.573.03) and any coolant leaking would not be from the vacuum system, but from coolant flowing through the transmission heat exchange system.

Here's a small ship, coastal oiler I think, in Cap Hatien harbor:

[jadeb0x]

Thanks everyone, I removed the pump and from there was able to squeeze my hands in between the manifold to attach the vacuum line to the switch under the manifold, the line was missing. Now all replaced with new vacuum line.