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Project Addicted
Join Date: Jul 2012
Location: Eastern Shore. MD
Posts: 919
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How much metal did the thread chaser remove, if any?
All threads have a tolerance to be able to fit. 1 is real loose and 3 is quite tight. 2 is where most fasteners are made and this allows easy assembly with good strength. What does happen is that the hole can be threaded and end up at the big side of the tolerance and your studs could be at the small side of the tolerance, giving you the loosest fit possible and still be withing the spec. Your probably fine unless you chaser removed material. Then your threaded hole could be out of tolerance. Some of the better engine minds will have to advise you on how loose it too loose.
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Jon
1966 912
1976 911 3.4 Backdate Project
1986 944
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