Brake servo piping / plastic tubing

[Wayne]

Go home earlier and could hear a noise.
 
Had a look under the bonnet and the pipe from the brake servo to inlet manifold was cracked.
 
Quick question does this need to be a hard plastic pipe, I have replaced it with 8mm fuel hose (high pressure) as Skoda cannot supply a delivery date for a new pipe.

 

[AudiA8Quattro]

What is the internal diameter of the plastic pipe?
I would expect the rubber hose to fine as a temporary measure.

[Wayne]

What is the internal diameter of the plastic pipe?
I would expect the rubber hose to fine as a temporary measure.

8mm as that is the size of the fuel pipe that fits all ok, not sure if the plastic hose is a fraction smaller.

[AudiA8Quattro]

Try fitting it, and then test the brakes thoroughly 

[Wayne]

Try fitting it, and then test the brakes thoroughly 

It is fitted and have done 40miles all ok, not sure if that is good or bad.

[AudiA8Quattro]

Probably ok then.
The only problem i can see is when the rubber hose gets older it might collapse internally, leading to a loss of brakes.
That won't happen for years though.

[Wayne]

Well Skoda have tracked one down, need to collect in the morning.

[AudiA8Quattro]

Cool 

[Wayne]

Cool 

Turned out to be the wrong pipe, looks like it is modified now into 3 parts and one part is no longer available.

So the hunt is on for a s/h one.