At Cunning Diesel we perform precision counterbore machining for CAT, Cummins, Detroit and PACCAR MX-13 heavy-duty diesel engines. Counterbore condition and proper liner protrusion are critical to achieving reliable cylinder sealing and long-term head gasket performance, which is why this work demands accuracy, experience and the right tooling.
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Our counterbore machining is performed in-house at our facility or on-site at other repair shops, allowing us to bring our specialized equipment and expertise directly to the job when required. Whether we're supporting one of our own engine builds or working alongside another repair facility, every counterbore is machined with the same focus on precision, consistency and getting the foundation of the engine right.