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[TestOmega]

Ok, so it sounds external to the car, sort of front drivers side (as in wrong hand drive US style ) around the wheel area?

Can you disconnect the vac feed to the secondary air injection valve and unplug the blower motor as a test?

Confirmed the sound is coming from the SAI pump area into about 2 1/2 minutes of idle.  From my limited knowledge I believe this is the time that the SAI switches from feeding the fresh air to exhaust (help warm up the O2s faster and emission on start up) to throwing the air out to some other system or into the atmosphere.

Any advice if there is blockage at the pump or any other parts of the SAI setup, etc.

Regards.

[Marks DTM Calib]

Well, there is a metal one way valve on the europeon spec cars on the metal pipe mounted in front of the cambelt cover, if you have one of these, check its working (easy to remove) by lowing and sucking through it.

Trouble is, the US emmisions system might be different

In the Uk we just disconnect the SAI pump and then blank of the vac feed to the vac operated valve mounted on the rad.

[TestOmega]

Well, there is a metal one way valve on the europeon spec cars on the metal pipe mounted in front of the cambelt cover, if you have one of these, check its working (easy to remove) by lowing and sucking through it.

Trouble is, the US emmisions system might be different

In the Uk we just disconnect the SAI pump and then blank of the vac feed to the vac operated valve mounted on the rad.

So I just want to confirm along those lines,

  -  I followed the OOF DVD when changing cambelt and I tested by sucking and blowing (we have the same metal pipe with one way valve), it seems to work as shown in the video
  -  To disconnect the SAI I will just unplug the electrical connector or should I remove the SAI relay in the relay panel under the ECU!  Which is recommended?
  -  To blank the vacuum feed I just need to insert a plastic plug etc., in the vacuum line so there is no vacuum leak
  -  Finally does it have any damaging impact on O2s or Catalytics, exhaust that I should be concerned about

Regards.

[Marks DTM Calib]

Well, there is a metal one way valve on the europeon spec cars on the metal pipe mounted in front of the cambelt cover, if you have one of these, check its working (easy to remove) by lowing and sucking through it.

Trouble is, the US emmisions system might be different

In the Uk we just disconnect the SAI pump and then blank of the vac feed to the vac operated valve mounted on the rad.

So I just want to confirm along those lines,

  -  I followed the OOF DVD when changing cambelt and I tested by sucking and blowing (we have the same metal pipe with one way valve), it seems to work as shown in the video
  -  To disconnect the SAI I will just unplug the electrical connector or should I remove the SAI relay in the relay panel under the ECU!  Which is recommended?
  -  To blank the vacuum feed I just need to insert a plastic plug etc., in the vacuum line so there is no vacuum leak
  -  Finally does it have any damaging impact on O2s or Catalytics, exhaust that I should be concerned about

Regards.

Dont pull the relay as it will raise a fault code.

I personaly just unplug the under wing motor, others pull the fuse for it.

Then as you say, a small bolt or similar to block off the vac feedpipe to the vac valve.

It does nothing to running emmisions, it stops the cats heating up quite so quick but that has no major long term effects

Its worth trying to see if the noise stops