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Re: B2581 Engine Timing Belt Change
Posted by Derek S. Brown - http://saabnet.com/tsn/forms/e.ph (more from Derek S. Brown - http://saabnet.com/tsn/forms/e.ph) on Thu, 12 Feb 2004 12:55:03
In Reply to: , Kok Chen, Sat, 17 Dec 1988 12:00:00 

This is a fairly difficult and big job.  Relatively few do it at home, but 
you'll find some company and tips on the NG900 bulletin borad on TSN.  I 
have changed the head gasket and timing belt on my 1994 900 S V6 B258.  It 
*is* doable but it takes many hours and will require some investment in 
tools and manuals.

First, get a copy of the official 'basic engine manual' for the V6 B258, 
part number 0357491.  The paper copies are getting scarce since they are 
out of print, but eeuroparts.com has them and some dealers may still be 
able to order one for you.  This was the only guide I used.  The Haynes 
does not cover the V6.  This manual covers all the main engine work, 
installation and removal of timing belt, heads, etc.

Most of the mechanical work is straightforward.  After you put the heads 
back together, installing the new timing belt is VERY tricky.  The manual 
says you should use an official Saab (Kent-Moore) tool set to do it.  I 
bought the set for about $300 from a dealer who sold it to me at cost.  
There are a couple cheaper aftermarket versions out there since the same 
tool fits the Saab 9000 2.5L V6, the 3.0L V6 in the 9-5, the Cadillac 
Catera V6, and the Opel Vectra V6.  (Do a search for more on this stuff 
on the NG900 bulletin board.)  I had some difficulty even with the tool but 
succeeded in the end.  One person on the NG900 board claims to have done it 
without the tool, but given the catastrophic consequences (valve damage) if 
you screw it up even slightly, I would not chance it.

That gives you an overview.  You will also need a buddy for a few steps, 
a torque wrench, a full set of Torx bits through T55 or T60 (can't 
remember) and Torx sockets up to E14 or so, many new parts (e.g., timing 
belt kit $400, new head gaskets, new head bolts since they are 'stretch 
bolts' etc.).  The manual is quite good about telling you when to use new 
parts.

Good luck!

Derek / 1994 900 S V6 139,000mi (HG job done at 125,000mi)
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