Metal Vac Pipe

[mikej]

Can anyone tell me where the metal vac pipe goes to on the 2.3 petrol engine, one end is fitted to a rubber elbow on the inlet manifold, it then travels around the righthand side of the head before dissapearing towards the block behind the exhaust manifold, i have a hissing sound coming from that area when switching off the engine and wondered if it was vaccume related ?

thanks again.. :rolleyes:

[Willie Krashitt]

I believe that the pipe you describe is for the crankcase ventilation system. The non manifold end should connect via a 'rubber' sleeve to the crankcase ventilation valve (PCV). This should in turn be held into the cylinder block/ oil seperator housing by a large grommet.

It would be under vacuum 99% of the time, and the connecting rubbers are known to split.

 

Hope this is of use,

George.

[mikej]

Thanks for your reply, it looks like i need to have a look tomorrow , is it normal for this to hiss after the engine is switched off as i have never heard it before? it's not causing any issues at the moment just a strange new noise lol :rolleyes: Edited September 10, 2009 by mikej

[Willie Krashitt]

There shouldn't be any noise from the PCV system if it is working correctly. Am surprised car is unaffected if it is leaking, as this would normally send the lambda sensor to its extreme of compensation ability, giving a poor idle.

If you check 'down the back', make sure that all hoses are connected on the manifold - canister purge, variable manifold actuator, fuel rail regulator and brake servo. Could be a leak on any of them.

 

George.