I don't actually know, but perhaps the paragraph below is a bit more detailed - it is from another post by the very same GeffV6man, this time in the Saab Central forum:
'Hi Mate, I worked at the V6 plant for years on durability / warranty, If you take the hydraulic tappets out you should be able to push the centre in and it should spring back - if it doesn't spring back its had it. (and you can't strip them down)
The later tappets fitted to the Saturn/saab V6 turbo were much improved - especially on start up - If you can find someone who is stripping one of these engines down - get the tappets - you also need to change the 4 x T vents which were also improved - there is one for each oil galery in the cylinder head - with the cam covers off these are easy to remove with an E10 socket - it might be worth cleaning these on your engine - as they could well be blocked - these vent the oil gallery. '
HTH....