Wheres This Pipe Go ?

[marinabrid]

hi all, tdi 90 1997 the pipe from the intercooler that comes up form the bottom and up over the front of the engine, on it is the air temp sensor i think, next to it is a small bore pipe similar to the vacuum pipes on a take offf point does anyone know where this pipe is supposed to go and whats its purpose ? i have attached a pic and drawn round the pipe, pinched seatkids pic but where is he ?

[Masked Marauder]

It goes to one of the vacuum servos on the buklhead IIRC.

[marinabrid]

this is the prob with my pipes ! i need to know to which one it goes bearing in mind that the early tdi 90 has a different turbo solenoid to the later models with a vacuum tank. mine has a small square one next to the egr solenoid. on later ones they are all piped in together as in the haynes book but early ones are a seperate. i think,

[Masked Marauder]

Well that pipe goes to the EGR I think. I will check the diagrams in ElsaWin presently.

[marinabrid]

have caught a nice chap at petrol station, looked at his, the pipe goes right round the back of the engine and dissaperas somewhere below !!!!!!! would like to know though just out of curiosity.

[andymet]

Hi

This pipe controls the Turbo waste gate, if its disconnected or leaking you will experince the turbo dropping out and loss of power when the engine is under load, ie going uphill especially towing.