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Is the cam timing belt service interval for the AH Holden Astra 90,000km or 60,000km as some people say?
It is 90,000km. The service interval was reduced from 100,000km to 60,000km in the preceding TS model after a number of serious engine failures caused by broken or loose belts caused by a problem with the belt tensioner. In AH the service interval was increased to 90,000km. When it's replaced mechanics usually find that the water pump is leaking, and they replace it, which adds to the cost of the job.
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