2004.5-2005 GM Duramax 6.6L LLY
SKU:66D-LLY-04505BTO-AM
All new pistons, rings, bearings, and gaskets are used throughout. Head studs are used instead of factory torque-to-yield bolts. Cylinders are bored and diamond honed to an oversize specification. The block decks are resurfaced. Crankshaft and camshaft locating pins are upgraded to square keys for additional strength. Oil pump gears are machined for retaining pins to the oil pump shaft. Factory connecting rod bolts are replaced with ARP fasteners. The cylinder heads are completely remanufactured with new valve guides and a 3-angle seat cut. Springs are tested for correct pressures with valves seated and open. Valves are inspected and precision reground or replaced as required. All valves are vacuum tested after assembly to ensure perfect sealing. Engines are assembled with front and rear seals installed, as well as the front cover, rear cover, and oil pan. The assembled engine is spin tested to inspect for correct oil pressure and compression, and the cooling system is pressure tested.
Additional options available upon request:
- Callies Compstar Crankshaft
Fill out the following to order your engine online
Inquiry Form
Features of this build
Engine Assembly
Blueprinting
Our process includes measuring and blueprinting all tolerances. The intent is to correct all of the small and large discrepancies within the entire scope of the engine assembly.
warranty
Built to last
When you build great engines, you can back them with great warranty. Click below to view our warranty for both commercial and non-commercial builds.
Built with the best components
- Choosing a selection results in a full page refresh.