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[Diamond Black Geezer]

So after lavishing attention on the old girl, there's two odd little whines/whistles appeared since the service...

Whistle - Hear it in the cabin - more so on pass side? Sounds like a Clanger in a box. Yes, a whistle, high-pitched but quiet, which rises in pitch depending on revs. My theory is it's vac related. I have changed the purge valve, and no more petrol smell on startup. Fuse pulled for SAI. The front multiram has been changed too. Nothing else vac related (that I can think of) has been changed.

Whine - Fractionally audible from interior, obvious when stood next to car. Coming from the front end. Disappears under any revs, so only occurs at idle. Pulley/ belt related? Will check for anything rubbing against the aux belt, but nothing apparent with a visual inspection last night.

Well, I'm confused! 

[Doctor Gollum]

Suppressor on back of 246 head still connected

Causes a whistle directly proportional to rpm... Most apparent through radio

[Diamond Black Geezer]

Oooh, like your thinking... Explain further, please! Can't picture it in my head...

[Diamond Black Geezer]

Been digging around OOF and it looks like the suppressor would only be an issue on MW and LW radio? Fairly sure it's there all the time, radio on or not... Will check properly when I get my car back (been stolen to take her nan out today  )

[terry paget]

Suppressor on back of 246 head still connected

Causes a whistle directly proportional to rpm... Most apparent through radio

I didn't know there was a suppressor on the head, thanks for that. I have suffered a radio whistle on fitting aftermarket plug leads, cure was to fit old Vx (presumably resistive) leads.

[Doctor Gollum]

Oooh, like your thinking... Explain further, please! Can't picture it in my head...

Do a search for misfiring manual 

[Diamond Black Geezer]

I have done as you suggest, but can't find anything to do with what sounds like my problem? I'll see if this noise occurs with the radio off  soon as I get my car back, and report back. No clue what the squeal from the front of the engine can be, however, that's got me confused and a bit worried. (I'm always worried) 

[Marks DTM Calib]

Suppressor on back of 246 head still connected

Causes a whistle directly proportional to rpm... Most apparent through radio

only fitted to 2.6/3.2 

[Diamond Black Geezer]

That'll be why I couldn't remember seeing it, then! 

Back to Plan A, then... something vac related? in my head I'd say it's a whine coming from the new (well, second hand) purge valve. But I'm loathe to swap it back as the interior doesn't smell of petrol anymore for 5 minds after startup! 

[Doctor Gollum]

Suppressor on back of 246 head still connected

Causes a whistle directly proportional to rpm... Most apparent through radio

only fitted to 2.6/3.2 

Fair dos 

[Diamond Black Geezer]

Sorry, I've now got an image in my head of Doctor Gollum crawling around in my engine bay muttering "where is the suppressorses? Myyyy precious suppresorses must be mines!! They took it, the Opel thieveses!"

[Doctor Gollum]

Sorry, I've now got an image in my head of Doctor Gollum crawling around in my engine bay muttering "where is the suppressorses? Myyyy precious suppresorses must be mines!! They took it, the Opel thieveses!"

Baptised 

[Nick W]

Sorry, I've now got an image in my head of Doctor Gollum crawling around in my engine bay muttering "where is the suppressorses? Myyyy precious suppresorses must be mines!! They took it, the Opel thieveses!"

You've met him! 

[Doctor Gollum]

Sorry, I've now got an image in my head of Doctor Gollum crawling around in my engine bay muttering "where is the suppressorses? Myyyy precious suppresorses must be mines!! They took it, the Opel thieveses!"

You've met him! 

Not sure he's had the misfortune

[Diamond Black Geezer]