Knocking Noise

[AGL]

On start up.

Sorry - I'm sure I've read on here before that it's potentially the 12v on the way out, but can't find the thread.

So, usual launch procedure was adhered to - foot on brake, in to D, foot brake off etc. Didn't really notice the knocking noise as the stereo had been left on 'offensive' by the wife. Turned the stereo off and there it was, some strange knocking noise. Not too violent, but loud all the same.

Turned the car off and on again ant it was fine. Got to the office this morning and turned it off and on again and all seems fine. Possibly as a result of the 12v having charged some more?

It's a 2010 TSpirit. I thing Grumpy Cabbie had some engine problem with similar symptoms, but don't recall the diagnosis.

[Awebb180]

Intake manifold getting condensation in the outer two cylinders. is your car under warranty? if not the manifold is about 350 + vat from memory

Alex

[johalareewi]

There is a TSB about this.

http://priuschat.com/threads/new-service-bulletin-for-engine-knocking-at-startup-t-sb-0012-10.102200/

[AGL]

Thanks, chaps.

The car's done 75,000 miles now, so will be excluded from the warranty.

It's a company car so we'll do the work ourselves, however how can the problem be accurately diagnosed? Disassembly?