[Main C900 Bulletin Board | BBFAQ | Prev by Date | Next by Date | Post Followup ] Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos Naa, it's the blocks. Don't forget we're talking 2.1 Like This Post: - Subscribe to Daily Digest for this Bulletin Board Posted by RS [Email] (#15) [Profile/Gallery] (more from RS) on Fri, 8 Oct 2004 10:34:36 In Reply to: I thought the issue was the heads, not the blocks!, JohnB, Fri, 8 Oct 2004 07:20:09 Alert me when someone posts in this thread: Members do not see ads below this line. - Help Keep This Site Online - Signup

litre engines, not the 2.0.

For one example, go back through Mike Stone's posts from 2000. He made the observation that the block alloy on the 2.1 litre engines was somewhat softer than the high-nickel alloy in the 2.0 litre engines. When you open up one of the 2.1s, the cross-hatching in the cylinders is often gone and sometimes there's a ring ridge. That doesn't occur with a 2.0 litre engine, and is just like you describe. The alloy in the 2.1 block has less nickel, and for some reason, tends to cause galvanic corrosion with the aluminum heads at a significantly faster rate than the 2.0 engines.

And, I agree with you that an aluminum head on a cast iron block is an invitation for galvanic corrosion. That's well-established and it's just chemistry.



posted by 66.167.192...

Link to Mike Stone's post on 2.1 litre engine alloy

• buying a used saab, alexis, Thu, 7 Oct 2004 20:51:53
  • Re: buying a used saab, Tim, Fri, 8 Oct 2004 06:12:55
  • First time I've heard that about headgaskets, whitesaab, Fri, 8 Oct 2004 05:45:22
    • The 2.1 litre engines have blocks made of a different, RS , Fri, 8 Oct 2004 06:17:29
      • I thought the issue was the heads, not the blocks!, JohnB, Fri, 8 Oct 2004 07:20:09
        • Naa, it's the blocks. Don't forget we're talking 2.1, RS , Fri, 8 Oct 2004 10:34:36 <-- Viewing This Message
          • OK..that's why the coolant is so important too!, JohnB, Fri, 8 Oct 2004 13:29:22
            • Decent stuff, RS , Fri, 8 Oct 2004 14:01:19
      • Really....my 90 is ok at 176K, whitesaab, Fri, 8 Oct 2004 07:16:16
        • Your '90 is a 2.0 litre engine n/m, RS , Fri, 8 Oct 2004 10:19:57
          • Re: Your '90 is a 2.0 litre engine n/m, whitesaab, Fri, 8 Oct 2004 20:47:37
            • OK, it's not stock. How many miles on the engine? n/m, RS , Fri, 8 Oct 2004 21:36:50
  • Best if headgasket has been replaced >, ChipJ, Fri, 8 Oct 2004 03:35:53

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