This is the MOST CRITICAL step of this repair, creating precise alignment (a seat) for the tooling bit to stay on center and not follow the angular broken surface of the stud. While applying light pressure, activate your drill both on and off five times in one-second intervals (ten times if utilizing an air ratchet). SET THE CUTTING EDGE: Important step to avoid drill bit breakage. (This will ensure the cutting edge is not damaged.) *Repeat this procedure for each sequential step in your applicationĤ. Insert the prepared ProDrill™ into the mounted ProBushing™ by slowly and manually turning the drill chuck until the ProDrill™ slips into the bushing and makes contact with the surface of the damaged stud. Apply one drop of ProLube™ (PPL001).ĪVOID USING PENETRATING OIL/SPRAY OR OTHER LUBRICANTS WHICH ELEVATE CUTTING EDGE TEMPERATURES CAUSING THE BIT TO BURN AND CEASE CUTTING.ģ. Using drill depth gauge, machined into the ProPlate™, set the proper depth of the bit and mark if necessary. Then insert the corresponding ProDrill™ machine grade tooling bit (included) into an air-powered, angled-style drill. Insert the ProBushing™ into the ProPlate™. Torque ProFasteners to a minimum of 20 FT-LBS.Ģ. Mount the ProPlate™ to the cylinder head using the included ProFasteners (PPF008375 or PPF008500) according to the enclosed cylinder head schematic. Need help with the repair? Contact ProMAXX Technical Support 72ġ. We proudly provide limited lifetime warranties and free unlimited technical support. All ProMAXX® tools are manufactured in the United States of America from American materials and craftsmanship. GM LS: 4.8L, 5.3L, 5.7L, 6.0L, 6.2L V8 REMOVE BROKEN BOLTS - MIKEYĬongratulations on your purchase of a ProMAXX® engineered performance device! Our tools have the highest quality and precision in the market delivering the most productive repair. ProMAXX Tools larger plate holes provide the use of a thread repair kit that includes bushings, bits, and superior solid steel inserts, unlike spring-style, to completely restore the cylinder head to factory condition. Received a previous repair attempt or botched repair? No Problem. Bolt Mikey in any position with our included precision fasteners to provide unparalleled, repeatable, and predictable results. Other kits use inexpensive clamps or loose slip-fit bushings. This unlocks the broken remnant without pinching it in the cylinder head as in other kits which make your repair non productive. ProMAXX kits incorporate non-deforming extractors that can be utilized both in the clockwise and counter-clockwise direction. Other kits use less effective, tapered left hand extractors only, which pinch the broken remnant in the head, only amplifying the difficulty in removing the bolt and making the repair. We incorporated two sets (125/188) of our tough Gold Tooling (Drill) Bits to first pilot, and then drill for the larger extractor to remove the loctite® fitted broken bolt. GM uses loctite® when installing the studs at the factory, making them some of the most difficult to remove, especially up under the firewall. ProMAXX Tool’s exclusive screw-in bushings, which incorporate proprietary mating angles, once seated, has the most precise alignment with the cylinder head.īottom Line: If you can’t get the most accurate hole placement, why use a tool at all? It is the smallest and thinnest available to fit behind the firewall to make the repair. Mikey facilitates the removal of broken exhaust manifold bolts on GM LS: 4.8L, 5.3L, 5.7L, 6.0L, 6.2L V8 engines.
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