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Date: 3 Aug 2001 04:09:27 -0700
From: nutmeggernopsameja.com (Nutmegger)
Subject: Re: Headgasket on a 9000 CSE Ecopower


Johannes H Andersen wrote: > > What has been the quality problems with those models? > > > > It has been reported in this ng that it is not an uncommon phenomenon, > the quality of the original headgaskets was in doubt. I see......maybe it is the quality of the metals used. > > Maybe I'm missing something? > > > > Since water cools the engine the temperature will be fairly even through > both block and head. You are quite right that different metals expand at > different rates. A lot can be done, however, with alloying. So many things come into play. I still feel the design could be improved. > > > It seems to me that head gaskets shouldn't be a repair needed in the > > same sense one thinks of brakes or doing a clutch. Yet, many people I > > talk to seem to have it done at one point or another. > > > > True, headgaskets last a long time, but not as long as the engine. Suppose > it also depends on your driving style. Well....one thing about Saabs, they just seem to like to be driven hard. I have a bad habit I can't seem to break - when I'm really upset or mad over something I drive my car a lot harder, push it more. I don't mean just speeding either. It takes it well. > > It looks like cast iron is slowly being replaced anyway, here are a > > few articles if you are interested. As usual, it comes down to money, > > not necessarily what is best. > > Quite right. It is not just the price of the metal, but also the processes > involved. Noise is another factor, I guess alu is noisier than cast iron. Yet, some people swear by aluminum. And, it seems in racing cast is preferred. > But I don't really know these things. Me neither, but I find it interesting. > > > > > http://www.amm.com/inside/designs/1999/ds052499.htm > > > > http://www.kellogg.northwestern.edu/ext_rel/clipping/001018lat.htm > > > Thanks, You're welcome. :) ~J~

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