Rebuilding DI Cassette: - Saab 9000 Bulletin Board - Saabnet.com
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Rebuilding DI Cassette:
Posted by RayF (more from RayF) on Sat, 6 Nov 2010 20:25:11
In Reply to: Re: rebuilding .., derf, Sat, 6 Nov 2010 16:18:10
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Derf - -
One thing you could try is, check out the "spigots" of bakelite that go down into the spark plug holes and serve as insulators between the springs that carry the spark and the block. See if any of them have spongy places, signs that spark has been arcing right through them and has carbonized the bakelite, changing it from an excellent insulator into an excellent conductor, leading the spark nearly straight to ground.
If you find any, try hacksawing them off above the bad place, then test drive your car with the "bad" DI cassette.
I have one that went bad and has this condition. I haven't yet tried cutting off the bad bakelite as I got a near-new DI cassette to replace the bad one from a junkyard, for almost free. But I intend to do the test some day, to see if it's any good as a backup.
I think the spring conductors will stay centered even without the plastic around them, and work just fine. But I need to test it, to see if even without the carbonized "insulator" it is in fact functioning still, or if the bad insulator caused further trouble up inside.
If yours seems to maybe have this same trouble, and if you try the fix and it works, please post so on here?
posted by 72.227.89...
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