Vacuum Cleaner Noise on Start Up

[KC1]

Don't know how else to describe it... every morning when I first start my 2000 BoxsterS, there is a mysterious squeeling noise coming from the area behind the passenger seat head rest. It continues for a few seconds, then ends with a noise that sounds like a vacuum cleaner winding down. It only does it on the initial start up. Car has 88,000 trouble-free miles on it, and is well maintained. Any one else ever experience this?

[Anker]

ts the secondary air injection pump or SAI. It pushes air through the cats until they warm up. All normal.

[Blackcloud]

That sucks. Sorry, had to say it!

[911monty]

Originally Posted by KC1

Don't know how else to describe it... every morning when I first start my 2000 BoxsterS, there is a mysterious squeeling noise coming from the area behind the passenger seat head rest. It continues for a few seconds, then ends with a noise that sounds like a vacuum cleaner winding down. It only does it on the initial start up. Car has 88,000 trouble-free miles on it, and is well maintained. Any one else ever experience this?

+ 1 on SAI pump. Runs ~90 sec. Squealing noise is probably bearings going out. There are threads on rebuild etc. But if it was me They are cheap on ebay. QualityPorsche parts highly recommended seller. Buy a low mileage one and swap out.

[jaykay]

Sai..........