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Wise Auto Tools: Detailed instructions for preparing to use any of the TIME-SERT Universal head bolt thread repair kits, including 11125, 2200, 3700, 4800, 4900, 6250, 7577, 7580, 14300, 15100. Note the Universal kits that in in BS are the Big Sert kits used for second time repairs when the hole has previously been repaired with a Helicoil making the hole larger than normal.These are directions for preparing to use any of the TIME-SERT Universal head bolt thread repair kits.Before we start, a go …