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White smoke is coolant in the cylinders. Died and won't restart cause the spark plugs are shorted with coolant. If you keep trying to start it without fixing it you could bend a rod!

Most likely it is a failed intake manifold gasket or intake plenum gasket or the intake plenum itself. Don't drive the car cause if it is the plenum leaking coolant into the engine it can fill a cylinder with coolant and do major damage when you try to start it.

No way to know for sure which of the three it is without pulling the plenum. If you're pulling that you might as well change the intake manifold gasket too.

Could be a bad head gasket

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Q: After beginning to produce white smoke from the exhaust a 98 Bonneville dies and would not start again what could be causing this?
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