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96 Engine Whine - Is this normal on recently rebuilt engine?

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Hi all,
I have a weird whine in my 03 996 which makes it sound like a sewing machine. Unfortunately I have only had the car a few weeks.
I have done many searches and heard similar sounds with no conclusive solution. Some says its normal, a couple of others have identified thrust bearing or pilot bearing.
Key points:
- The whine varies with revs
- Occurs when stationary, does not matter if moving or not
- Depressing the clutch makes no difference
- Also occurs with the serpentine belt removed, so not alternator/pulleys (I wish it was that easy!)
- It is not the SAI pump, that makes a different whine (and I have that one, but not bothered!)
This is also a Hartech rebuilt engine around 10k miles ago, also had the clutch done at the same time.
Find the sound with the belt on below (listen to revving):
Find the sound with the belt off (skip the pulley checking part), you will see they sound the same:
Anyone had a similar problem and solved it? Or is it normal and I should not worry about it, because apart from that the engine sounds sweet.
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Mine sounds exactly like that. It's 1998 996 with 40k miles on it, and to my knowledge in perfect condition. Also my previous Porsche, a 2001 Boxster S with 60k miles sounded just like that.

I think this whine is distinctive to these engines and completely normal. How does everyone else's engine sound like?



Edited by Kimple
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Its beginning to look like this is 'normal'. I got a look at a 996 at the weekend (hard to turn up to a garage in a 996 looking at 996!) and replies on another forum all suggest its normal. I'm going to look at a few more hopefully.

I can't believe Porsche would sell a car sounding like a sewing machine from new!

Some seem to have the sound on youtube, others not, but I guess this depends on how well the sound is recorded.

Once I know more i will update thread.

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