Date: Thu, 19 Jul 2007 13:57:38 GMT
From: still me <>
Subject: Re: Another DI Cassette failure problem

On Thu, 19 Jul 2007 04:49:09 -0700, jrh <> wrote: >Actually, I wanted to double check before responding, but my SAAB >does, in fact, have NGK plugs, which were replaced at the time of the >last cassette change (although I don't think they were the time before >that). > >Some of my reading on this subject has indicated that heat and >vibration can expedite a cassette failure. I have a slightly bent >wheel that causes some vibration at speeds between 55 and 65 mph and >my water pump was also failing (not to mention, I live in Florida >which is a bit hot during the summer). Has anyone else had an >experience where this type of heat and vibration contributed to the >failure or am I just coming up with a "post hoc ergo proctor hoc" >excuse? It's possible, but I would be surprised. Wheel vibration would have to be pretty severe I would think. If the water pump was causing high temps, that might contribute... but I'm still suspicious. Maybe if your car has been running in the upper end of the gauge... that might do it. I guess the obvious solution is to fix those things since they need fixing anyway. You could call Saab and ask if they have seen any similar issues with repeat failure - but they are likely to tell you to visit a dealer and have it checked out for other issues. It might be time to do that once you fix the known issues. Or, at least call around to some dealership service departments, see if you can find a real service manager (vs. a "service writer") and see if they have any feedback. You could also join for about $30 and get access to the full text of any TSB's. I'm not aware of any on repeat DI failure modes.

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