DLC stands for Diamond-Like Carbon, an extremely thin layer of carbon-based coating applied to the lifter's contact face against the cam lobe. Despite being very thin, the layer delivers tangible gains in durability, performance and reduced friction.
What does the DLC coating do?
DLC coating has properties similar to diamond: it is extremely hard, resists wear and corrosion, and has very low friction. Applied to the contact face of the lifter (the cam bucket), it brings several benefits:
- Reduced friction: Lower friction between cam lobe and lifter improves engine efficiency and cuts energy losses.
- Increased wear resistance: The hard surface prevents wear and extends the life of both lifter and camshaft. Unlike flat tappet lifters, which require a careful break-in, DLC lifters need no special break-in procedure.
- Improved stiffness: A stiffer lifter gives more precise valve motion at high rpm.
- Lower oil temperature: Less friction generates less heat, which can bring oil temperatures down.
Design advantages
Beyond the DLC coating, quality lifters often have a reinforced skirt and a larger internal radius than OEM parts. Together these improvements contribute to lower friction, better force transfer and cooler oil temperatures.
When do you need DLC lifters?
DLC-coated valve lifters are especially valuable in:
- Racing applications: Where valvetrain loads are extreme and standard components do not offer enough durability.
- Highly tuned street cars: With aggressive cam profiles and high spring pressures.
- High-revving engines: Where friction losses from the valvetrain become significant.
- Builds focused on long service life: DLC extends the service intervals for camshaft and lifters.
Will they fit my engine?
DLC lifters are available for many popular engine platforms and should be part of the plan from the moment you choose a camshaft. Get in touch with us at Meksta and we will tell you what is available for your specific engine build.
Contact Meksta for advice on valve lifters and valvetrain components.
Also read about flat tappet vs roller lifters, camshaft materials and surface treatments and hydraulic vs mechanical lifters.