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Yep - M471 is the 'sport group' option. But 474 is the standard Porsche code for 'sport suspension' (shocks) - so uprated shocks (Koni/Bilstein)should be accompanied by this code.

Trouble is Porsch ...

scotchw I'd like some clarification as to the specific "partial" upgrades you are speaking to. So can you tell me what the ROW cars have over my 5 lug, 4 wheel vented discs, 160 lbs springs ...

Cedric - as you are in Sweden you'll have a Euro car. These had many upgrades compared to the NA cars. But the US 931's only got partial upgrades because the emission regulations restricted the power ...

Okay - so machine shop here I come.

Valve seats & guides are pretty good as head was professionally rebuilt under PO & has done little miles since (but long time - 10yrs - hence head corros ...

I'll check out the "suspected crack", although all the marks I saw when working in the head looked like surface corrosion 'trails'.

I've been using 'proper coolant', but PO had a water le ...

Oops! Fixed my picture link.

I got a local exhaust fitter to weld my breather tube back to the oil separator block - the pipe wasn't broken, it was the thin metal of the separtor block that had cra ...

Okay - I think I've discovered the source of my problems.

While cleaning up the head it became apparent that it was heavily corroded around all the waterways. This had pushed the head gasket away & ...

Sure Paul - thanks for taking the time...

Which pics are you after? I'm only on dial-up at home

so it'll take ages to send you all of 'em.

Head coolant passages look pretty nasty considerin ...

I've discovered my car was suffering from this fault (broken breather). Found it whilst dismantling in this area (I was taking the head off):

http://img204.imageshack.us/img204/4950/brokenturbobrea ...

Compression test gave: 175, 120, 135, 145 on cyls 1-4. Not too good... and old head bolts were torqued up correctly.

So I've pulled my head. It was hard work!

I had to cut my J-pipe 'cos the nut ...

Thanks Khal - good memory!

You're right about poppin' the dizzy: there's the 2 coolant hoses off the temp sender housing @ back of head that need to come off, & I found it easiest to pop the di ...

Ouch - I hope my car isn't going that way

I'm hoping to do a leak down test & (assuming the worst) pop the head this weekend to examine my head gasket.

I've never had the head off, so g ...

Thanks for the feedback guys.

Good to know that the breather mayo is "normal" (the climate is always a bit damp over here in Blighty) - it does seem to be the turbo breather pipe that col ...

Thanks for the info in this thread guys. The comments Tigger made apply to my car unfortunately - especially the bloated exp tank

I've been chasing coolant leaks ever since I had the car, & ...

It did until I went out for my maiden voyage after fitting it!

I also replaced a couple of w/pump hoses (the tstat one had been weeping for some time I suspect):

http://img244.imageshack.us/img2 ...