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head job

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    H3 Rattle near fan when idle and at normal operating temp. only

    2007 132,000 miles Hummer Service did head job, within a week a rattle began only when idle and when eng is at normal operating temp. That's to say when its cold and until the temp reaches normal, no rattle. Same if driving... no rattle. The rattle comes from the fan/front engine upper area...
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