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How do I properly diagnose hydroboost noises?

April 26, 2017Diagnose noises properly

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How do I properly diagnose hydroboost noises?

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First, define the nature of the noise. With the engine running apply the brakes and listen for irregular noises. A whine usually indicates low fluid (power steering). A gurgling or rumbling noise indicates air in the system. A pulse thump indicates trapped air in the hydroboost circuit.