2002 a4 Tdi awx vacuum Pipes and hoses

[maui_matt]

Hi There I have just replaced the 1.9tdi AWX engine in a 2002 Audi A4 5 speed manual, What I would like to know is if anyone has any pictures or diagrams of the routing and connections for the vacuum lines that run from the Presure controllers to the Egr Vave, Turbo Actuator, brake vacuum etc, as the Diagram from audi is a bit vague and the Parts Catalogue is a little more inspiring and helpful but i want to be 100% certain that all is correctly routed!!

Why do I want to know how they all go is because the car was bought with a minor engine bay fire (a/c) compressor caught fire and melted most of the pipe work dowm there!!

Any Help most appreciated pictures/diagrams for reference even more so!!

Thanks in advance

Matt

[Camb-Tech]

I remember someone else having to do this.

I think they found a good diagram in the Haynes manual which made more sence than the Audi one.

Might be worth buying one?

[Buzzoff]

Haynes manual is the way to go!!!!!!

[maui_matt]

Thanks guys,
Have a haynes manual and its the same as the Audi workshop one, it just doesn't give any clarity to which hose goes to which connection i.e vac in / vac out thats all!!
The diagram on vagcat is alot more helpful but just wanted to see if there was someone with some hands on experience with the vacuum system or some one with a photo?

Cheers for now

Matt

[maui_matt]

Many Thanks To KENNEY for help with this one have attached the picture for reference any time if needed!!

1 -

Non-return valve


q
Note installation position (light side/dark side) - as shown in illustration

2 -

Exhaust gas recirculation valve -N18-


q
Installation position: front right of engine compartment

3 -

Variable intake manifold flap change-over valve -N239-

4 -

Vacuum unit for charge pressure control

5 -

To tandem pump

6 -

Vacuum unit for intake manifold flap

7 -

Mechanical exhaust gas recirculation valve


q
Can only be renewed together with intake connecting pipe

8 -

Vacuum reservoir

9 -

Solenoid valve for charge pressure control -N75-


This is for 1.9tdi AWX and AVF engines!!

Cheers



Matt

[craggs1695]

Many Thanks To KENNEY for help with this one have attached the picture for reference any time if needed!!

1 -

Non-return valve


q
Note installation position (light side/dark side) - as shown in illustration

2 -

Exhaust gas recirculation valve -N18-


q
Installation position: front right of engine compartment

3 -

Variable intake manifold flap change-over valve -N239-

4 -

Vacuum unit for charge pressure control

5 -

To tandem pump

6 -

Vacuum unit for intake manifold flap

7 -

Mechanical exhaust gas recirculation valve


q
Can only be renewed together with intake connecting pipe

8 -

Vacuum reservoir

9 -

Solenoid valve for charge pressure control -N75-


This is for 1.9tdi AWX and AVF engines!!

Cheers



Matt

hi im stuck with mine it was accident damaged and snapped most the hoses off they have been replaced now but im still going into limp mode its throwing code 17964 up today it was different codes yesterday so removed the egr and cleaned now still doing the same but with this code the diagrame here shows the n75 the number 9 with only 2 hoses going to it mine has 3 also were does the pipe labeled number 5 go to or is this just a breather my head is done in any help would be great thanks dave

[maui_matt]

hi im stuck with mine it was accident damaged and snapped most the hoses off they have been replaced now but im still going into limp mode its throwing code 17964 up today it was different codes yesterday so removed the egr and cleaned now still doing the same but with this code the diagrame here shows the n75 the number 9 with only 2 hoses going to it mine has 3 also were does the pipe labeled number 5 go to or is this just a breather my head is done in any help would be great thanks dave

Hi Craggs,
I'd love to help, i'm currently out in afghan with the RAF so hope you can forgive the delay in responding, Is yours a manual or auto gearbox and secondly is it a awx / avf 130 bhp diesel?
I know the Passats have a 3 way controller as their vac system is a little different in the plumbing and actuation even thaough the same engine, Can you get hold of a part number off of it, it should start 8eo.
Will try my best to help just may be a bit slow as several hundred of us here and 30 computer terminals can make thinks a bit long winded to reply to say the least!!
Pipe number 5 runs to the Vac pipe work and nrv that runs between the tandem fuel pump on the rear of the engine and the brake servo out pipe that passes through the bulk head!!

Anymore questrions feel free to ask and i'll do my best!!

Matt

[craggs1695]

Hi Craggs,
I'd love to help, i'm currently out in afghan with the RAF so hope you can forgive the delay in responding, Is yours a manual or auto gearbox and secondly is it a awx / avf 130 bhp diesel?
I know the Passats have a 3 way controller as their vac system is a little different in the plumbing and actuation even thaough the same engine, Can you get hold of a part number off of it, it should start 8eo.
Will try my best to help just may be a bit slow as several hundred of us here and 30 computer terminals can make thinks a bit long winded to reply to say the least!!
Pipe number 5 runs to the Vac pipe work and nrv that runs between the tandem fuel pump on the rear of the engine and the brake servo out pipe that passes through the bulk head!!

Anymore questrions feel free to ask and i'll do my best!!

Matt

hi well here is the full story i bought it accident damaged all of the vacume solinoids or wat ever they are were broke also the turbo was smashed the turbo was replaced with 1 from a skoda supurb same number on the turbo units and i replaced the vacume solinoids with 3 of a golf gttdi 2 were the same the nt75 was different but thought id try any way as was the same apart from they way 1 pipe came out the oppisit way tried it car started fine all seemed fine car was panneled and painted took it out when running after a while it went into limp so put it on the comp nt 75 vac soliniod changed this for the correct 1 still doing the same was thinking the pipes were maybe piped differant but after leaving the car stood for a week its going into limp a lot more now and seems to last longer the more im using it untill its stood again so im tempted towards the turbo vains wat do you thing i was planning replacing all vaccume pipes and doing the vains all in 1 go as u need the air box removed to do either so thought 2 birds 1 stone wat you think oh its a audi and running the awx thanks dave