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Q: re: an '04 Lexus RX330: if timing belt breaks will it ruin the engine? on 2004 Lexus RX330

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My daughter's timing belt recently broke in her 2003 Saturn Vue - whuch resulted in the pistons destroying the "head" of the engine. Estimates are $3,500 - $4,000 to replace the engine. Is this symptomatic of only a certain type of engine - and, do we need to be concerned that the same thing could happen with a 2004 Lexus RX330 Engine? Further, how often should the timing belt be replaced? How do you know when it is necessary? Thanks!
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YES, your Lexus could bend the valves as well, that is why you should replaces your timing belt every 6 years or at the mileage suggestion, even if the factory manual does not say to do so. After 6 years the belt material gets fatigued and cracks or can snap.
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