Head Build Valve Guide Honing
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On the other hand, if the guides are on the tight side (i.e., the measure is smaller than spec), they can be honed to the proper size. It's a job best done by a pro, but if you choose to tackle it, be sure to use the proper tool and to keep the guide clean and lubricated as you hone. Work slowly and evenly, and measure frequently. View Related Article
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