General Motors: GM-42385-700 High Feature Thread Repair KitGeneral Motors: GM 42385 700 High Feature Thread Repair Kit Kent Moore J 42385 700, EN 42385 700 The upper rocker cover has several M5 bolt holes not covered in current thread repair kits. GM 42385 3050 contains the drill bit, counter bore, tap, driver and inserts (in a storage box) to repair the M5 bolt holes in the upper rocker covers. Time Sert thread repair inserts are the preferred repair method specified by GM Powertrain. Repairs performed