Engine noise after starting, a zip for a second.
Engine light on (6/2000) no default found, therefore nothing wrong.
First repair for above: no noise found.
Second repair: replaced battery.
Third repair: replaced starter.
Fourth repair: sludge in the engine, warranty void. Saab will not help with a solution for repair or replacement, and the dealer is not interested either.
Just curious you mention the engine size... the smallest engine Saab makes is a 2.0 litre. Also you mention sludge in the engine and the dealer will not help, I could be wrong but sludge usually refers to the oil not being changed. If it was not changed regularly, i.e. at least every 5,000km, then yes, your engine will knock and eventually seize. This is definitely not a manufacturer or dealer problem, and they are well within their right to refuse to help (if this is the case)... maybe there's more to this story, but the information given doesn't say much.
Engine sludge in the 2.0 Turbo of this vintage is quite common, even with the most rigorous maintenance schedule.
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