Elgin Industries supplies the HL178 / HL-7011WT LS engine AFM hydraulic lifter.

Active Fuel Management from General Motors

Thank you for your interest in GM hydraulic lifter information. The GM LS engines all share the standard GM roller lifter.  The lifter was developed in the GenII LT1 and Vortec Engines. This HL-2148 is what most people commonly refer to as the LS7 lifter.

In the engines equipped with AFM, the HL-7011 controls the de-activated cylinders. For instance, this HL-7011WT is known as the HL178 hydraulic lifter.  Today’s GM engines are DFM Dynamic Fuel Management. The DFM is different from AFM.

Lifter failure is the fuse of your engine

The spring on the top of the lifter body is designed by General Motors as the fuse of the valvetrain. If the vehicle computer activates the VLOM at the wrong ignition valve timing, the spring is designed to collapse. This saves the rest of the engine from damage. As long as the tolerances of the valves, valve springs, pistons, rocker arms, pushrods are to the manufacturer’s original specifications. Here at Elgin Industries, we offer auto parts equivalent to OEM interchange.

Intermittent ground fault with your vehicle PCM is the most common cause for lifter failure. The collapsed spring is a mechanical fuse designed to compensate for electrical failure. To prevent the issue from reoccurring, you should further inspect the electrical system. This includes GenIII, GenIV, and GenV LS engines.

Replacement auto parts for the AFM LS engine

When replacing the lifters, be sure to change a few other parts too. Lifter guides can fail from polymer fatigue. The worn guides can allow the lifter to spin in the bore causing engine failure. Elgin Industries’ lifter guides are OE. They are the same as you would buy from the parts department at your new car & truck dealership.

Although we do not supply the VLOM, or the matching VLOM filter, these should also be replaced with the new lifters. A certified technician could also test your Variable Lift Oil Manifold. This applies to any AFM Chevrolet, GMC, Cadillac, or GM Product.

If the cam was damaged, you should be certain the new AFM camshaft is correct for the vehicle VIN. Some vehicle owners are choosing a complete AFM delete kit from reputable suppliers. We do not offer a complete kit, however, we do offer many parts. In addition we offer timing sets for one bolt and three bolt camshaft conversions. More of Elgin Industries LS engine parts are available in our online catalog.

Your resource for quality Engine & Chassis parts

In conclusion, the overall design of the pushrod V8 engine continues to prove reliable. After all, it’s compact size has found it’s way into a variety of light and medium duty truck platforms. Parcel package delivery transports, pump & power generation, and defense contract vehicles all share LS power. Elgin offers a full line of engine and chassis components. How can we help you?

Elgin Industries continues to supply engine & chassis parts for global and domestic markets. As a Tier One original equipment manufacturer, we also supply aftermarket auto parts. Similarly, you can find our parts from world wide wholesalers and regional distribution warehouses. In addition, we supply production engine remanufacturers, as well as machine shop engine rebuilders. Above all, we’d be happy to connect you with a distributor if you need help locating Elgin parts.

Please feel free to contact us today!

sales@elginind.com  USA & Canada

worldtrade@elginind.com outside the USA

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An Update on COVID-19

To our customers,

As we continue to navigate the rapidly evolving COVID-19 situation, our first thought is for the safety and well-being of our employees and customers. At Elgin Industries, we are committed to providing you high quality products, maintaining a safe and productive environment for our employees, and playing our part in helping to mitigate the effects of the pandemic. I want to assure you that Elgin Industries is following CDC, OSHA and local Health Department recommendations. We have implemented engineering and administrative controls that allow for social distancing, health monitoring, strict cleaning and sanitation as well as other measures to minimize employees’ exposure to COVID-19.

At this point only essential visitors are being welcomed to our building, and are required to follow a specific protocol. All employees and visitors should wear a face covering over nose and mouth when entering the premises.

We continue to evaluate and update our measures to reflect any changes recommended by the CDC.


Bill Skok

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Elgin Industries Adjusted Operating Hours

To Our Valued Business Partners:

At Elgin Industries, we take the well-being of our employees and customers very seriously.

As we continue to monitor the rapidly evolving situation around COVID-19, Elgin Industries is committed to the safety of our environment and well being of our employees.

Effectively immediately and until further notice, Elgin Industries will be reducing its operating hours to 32 hours per week to aid in the practice of social distancing.

New Operating Hours

Office and Customer Service

Monday – Thursday 8:00 a.m. – 5:00 p.m.


Monday – Thursday 7:00 a.m. – 3:30 p.m.


Monday – Thursday at reduced hours

During these difficult and fluid times, Elgin will continue to work for the benefit and safety of our employees and those involved with Elgin Industries.

For updated information regarding COVID-19 and status, please visit www.elginind.com.

Best regards,

Bill Skok

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A Note from Elgin Industries about COVID-19

To Our Valued Business Partners:

At Elgin Industries, we take very seriously the well-being of our employees and customers.

We recognize and share your concerns regarding the novel coronavirus (COVID-19) and its potential impact on our employees and customers.

We are actively monitoring the situation and are closely engaged with our plant and distribution teams to ensure we are taking all necessary and appropriate actions. We are also reinforcing among all employees the importance of staying home and seeking appropriate medical attention should they begin to feel ill.

Elgin Industries has been deemed and “Essential Business”. We continue to operate and are committed to meeting all production and shipping requirements in support of your daily business needs.

As always, we take pride in our commitment to our customers, and we feel positive about our efforts to maintain the health and safety of our valued team members during this difficult period.

Thank you, as always, for entrusting us with your business.

Best Regards,
Bill Skok

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