DFC Diesel Remanufactured 6.6 LBZ Long Block Crate Engine (With Callies Crankshaft)

A DFC Diesel Remanufactured 6.6 LBZ Long Block Crate Engine (With Callies Crankshaft) from XDP is a cost-effective option for replacing the engine in your 2006-2007 GM 6.6L Duramax LBZ. This engine is built to be dependable and durable. DFC makes important improvements during the remanufacturing process to ensure longevity, even in high horsepower applications. For example, each engine includes an EDM oil pump shaft with a hardened dowel to prevent slipping and oil pressure loss. DFC uses Rottler machining equipment to ensure precise tolerances that exceed OEM specifications, resulting in a more efficient and longer lasting engine. 

The DFC short block is machined with near identical weight piston and connecting rod assemblies to help you get a smoother running engine that makes less noise and is more balanced.  DFC short blocks include reinforced internals with new pistons, rings, doweled oil pump, bearings, and rods.  

Unlike some others in the industry that re-use wearing items like valves guides, DFC replaces each one with a new cast guide in every cylinder head. Instead of just re-grinding and reusing valves like other companies, DFC installs all new valves from high quality sources like MAHLE or SBI. 

The included Compstar-Durastar crankshaft from Callies features a Deep DuraCase nitride treatment that enhances durability and wear.  Rod journals are drilled for reduced inertia and ease of balance. All journals feature True Form fillet radii and the timing gear is keyed to prevent shearing. These journals are also polished to a 6Ra or finer finish. The stroke is 3.898" with OEM journal diameters and width. Callies constructs this crankshaft through hardened 4340 steel. The damper fit is dual keyed. This crankshaft accepts OEM post and flange bolts in addition to OEM flywheels/flexplates. The main bearing oil holes have lead-ins for enhanced cold start oil flow to rod journals. 

Complete short block with the front cover and seal, rear cover with main seal, oil pan, all new internal components, cylinder heads with all rockers and pushrods installed, doweled oil pump gear, woodruff keyed camshaft, and complete gasket kit for installation. 

Oil Cooler - highly recommended and mandatory if your past engine had a bearing failure. 

Injectors - highly recommended especially on higher model engines or engines with contaminated fuel. 

Turbocharger - recommended if mileage over 125K, mandatory if shaft play, or if engine was dusted. 

Water Pump - highly recommended if engine has over 125K.  

Evans Waterless Coolant - recommended upgrade to prevent corrosion and boilover.  

The specific brand of each component may change due to part availability at the time of each build. Parts are chosen at the discretion of DFC and cannot be specially requested. 

DFC uses only the best components sourced from multiple brands during the remanufacturing process.