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Vibration

Fix14wd

Fix14wd

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Tacoma3G O.G.
So yesterday I got on the throttle and I heard a vibration from under the hood. Initially I thought it might be the K&N intake but everything feels tight. I've jostled everything I can grab and can't find anything loose enough to hit against anything else.. All the plastic seems tight. Had a friend today look under the hood while I rev'd it up, no vibration. But I heard it again on the way home when the engine kicked down and the RPM's went up. Wondering if anyone might have a suggestion to check? I know it's kind of vague..
 
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Fix14wd said:
So yesterday I got on the throttle and I heard a vibration from under the hood. Initially I thought it might be the K&N intake but everything feels tight. I've jostled everything I can grab and can't find anything loose enough to hit against anything else.. All the plastic seems tight. Had a friend today look under the hood while I rev'd it up, no vibration. But I heard it again on the way home when the engine kicked down and the RPM's went up. Wondering if anyone might have a suggestion to check? I know it's kind of vague..
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Sounds like needle bearing possible
 
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I found that there's a little movement in the fan clutch and an idler pulley. Very slight. Not supposed to be any movement there, correct?
 
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