A broken extractor will add hours to your repair and much more frustration. Lastly, Lower quality and cheaper extractors can be found everywhere – but they are usually a four-point, off-shore steel design and are prone to breaking if the threads are the least bit compromised. Equally important is unlike tapered left-hand extractors, the ProTractor does not deform the remnant pinching it in the head complicating the repair. The advantage of this type of extractor are many, but most importantly the ability to turn the damaged remnant both clockwise and counterclockwise to remove the remnant is a bonus. The ProTractor is a multispline screw extractor with a turn-out nut. In our experience, this is an American-made, hardened steel ProTractor. ProMAXX Tool offers a small drill chuck accessory that converts a narrow 1/4” drive air ratchet into a limited access drill.ĭrill a pilot hole and use the best screw extractor you can get. Your safest bet is to drill (or machine) the bolt remnant out.Īs mentioned above, a full-size drill is not going to fit into this limited space. Welding adds hardened material to an area that you are going to be heating to extreme temperatures and expanding. You seriously risk damaging the engine head as well as the top threads. If the bolt is recessed below the surface of the head, do not weld. Here is the tooling and operation that we recommend to remove broken bolts on the driver side of a GM LS engine: As with any complicated repair, the right tooling is going to make the difference between an hour-long job and multiple-day repair. You may be able to weld a nut onto the broken bolt, but if the bolt is recessed inside of the engine head, you are going to need an experienced welder and plenty of patience. On the rear driver side, this is still not enough to fit a full-size drill or a straight shot with a welding head. How to extract the broken stud in a GM after creating space:Īfter following the steps above, you now have a little more space to attempt the repair. Though this will take a little investment in time, it’s still less time than is required to remove the engine from the truck entirely. In the case of the driver-side rear bolt, removing the transmission cross member will allow the engine to drop down from the firewall providing some precious room for making the repair. These few extra minutes will give you an extra inch or more of space near the rear of the engine head. Take the extra effort to remove the heat shield located around the bell housing, underneath the firewall. Trying to operate on these broken bolts from the top is just going to result in frustration, mistakes and dropped sockets. Remove the wheel and inner fender to create more room. Here are a few ways to make room when removing broken bolts on a GM LS exhaust manifold: Have faith – at ProMAXX, we’ve seen this repair hundreds of times and have solutions that will allow you to remove broken bolts on GM LS engines, even those broken off on the rear driver side position. For dealership and hourly technicians, they know their customer may say – don’t bother, I’m not paying for that. For a flat rate mechanic, pulling the engine from the truck means they are probably going to lose money on the job. However, when the bolt or stud breaks off in the rear position of the engine compartment, space is an issue. Many technicians can find room within the engine compartment of other vehicles to either weld on a nut to a broken stud or drill a hole and use a screw extractor. Bolts and studs usually break in the front or rear position, under the firewall. GM trucks are notorious for their lack of space.
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