Duramax crankshaft keyway service

The cleaning is the responsibility of the customer. The service does not include crack checking, maganfluxing, or any viability check on the units themselves, and that's the responsibility of the customer.

For shipping to Alaska or Hawaii, please call us for pricing.

Protect your engine from catastrophic failure. Factory crankshaft keyways are notorious for shearing under high horsepower, heavy boost, or extreme torque loads. When the key shears, your harmonic balancer and timing gear slip, leading to severe engine damage.

At Dave’s Auto Center, we offer a precision mail-in machining service to permanently solve this issue. Send us your stock crankshaft, and our expert machinists will mill a larger, stronger keyway and install a heavy-duty, oversized key. This upgrade guarantees that your rotating assembly stays perfectly locked in place, no matter how hard you push your engine.

How the Mail-In Service Works:

    Purchase the Service: Checkout online to secure your spot in our machining queue.

    Ship Your Part: Securely package your clean crankshaft and ship it to Dave’s Auto Center.

    Precision Machining: Our team will inspect your crankshaft, machine the upgraded keyway, and fit the new oversized key.

    Return Shipping: We carefully package your upgraded crankshaft and ship it back to you, ready for a bulletproof installation.

Key Benefits:

•     Eliminates the risk of sheared factory keys.
•     Handles extreme horsepower and torque applications.
•     Precision CNC-machined for a flawless fit.
•     Includes a premium oversized heavy-duty key.