04.5-05 GM 6.6L LLY Duramax DFC Remanufactured Tow/Haul HD Series Long Block Crate 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. 

During the remanufacturing process, DFC upgrades the Tow/Haul Series engines to give you a better performing and longer lasting engine. Each long block gets DFC HD Push Rods, ARP 2000 Series Head Studs, Mahle Motorsports HD Pistons, DFC push rods and Hamilton HD valve springs. The Tow/Haul HD Package adds a set of Wagler Forged Connecting Rods, Wager stage 1 alternate firing camshaft, Balanced rotating assembly, HD flexplate and ATI dampener and Callies Compstar crankshaft.

Unlike some others in the industry that re-use wearing items like valves and valves guides, DFC installs all new valves from high quality sources like MAHLE or SBI and replaces each valve guide with a new cast guide in every cylinder head. To address common cracking areas in the cylinder head, DFC also machines each head to remove the factory hardened seat material. DFC then installs new SBI valve seats to help eliminate premature cracking, giving you a more durable cylinder head.

Full Warranty Information:

DFC stands behind their products with an industry leading 5 year/ 100,000 mile warranty.

Is this for commercial use? If so terms may vary, please click here to review DFC's full warranty information. 

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 and backs their engines with an industry-leading 5-year 100,000 mile warranty.

Note: $500 Crate charge is included in core charge total. Engine shipping crate must be returned with core engine to receive full core credit.