Current Lead Times: In Stock Engines Ship Same or Next Day - Out of Stock: 1-3 Weeks on Most Long Block Engines; 3-5 Days on Heads – *call us for more exact lead times for your specific build 

6.6L 2001-2004 Long Block Daily Driver LB7 GM Duramax Diesel Crate Engine

UPC : 659657085795

Please give us a call at 901-553-9847

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CHOATE 6.6L Long Block Daily Driver LB7 Engine 2001-2004 – Duramax Diesel Engine. Manufacturer: CHOATE Engineering Performance. CHOATE Part Number : CEP66LB7LD
Fitment : Fits 2001, 2002, 2003, 2004, 2004.5 Duramax 6.6L Chevrolet, GMC Equipped Vehicles

This 6.6L LB7 Duramax Long Block Build Includes:

500 HP rated. This CHOATE engine is fully balanced, and is the perfect engine for spirited daily driving, consumer level towing and everyday life.

  • Our Built-In-House Heads
  • Pressure Test Heads
  • Grind Valves
  • New Induction Hardened Seats
  • All New Valve Guides
  • Install New Valve Seals
  • Test Spring Tension
  • New Freeze Plugs
  • New Injector Cups.
  • Head Studs included in our Daily Driver build
  • New Head Gaskets

Full CNC blue print machining, (bore, deck, hone and line honed) – The Cylinder bores are blue print bored to a true 90 degrees from the crankshaft center line, prior to being diamond honed to within .0002 inch for precise piston to cylinder bore clearances. We main bore and line hone the crankshaft which is honed to precisely align the crankshaft in the engine block.

We bore the block back to the crankshaft center line and hone the block to RA13 finish. The piston diameter measured to the nearest .0001 inch matched to cylinder bores. The Cylinder block is surfaced to a finish of RA30 or lower, which meets the factory specification in both flatness and smoothness for the block to head sealing surface.

This is mandatory for proper sealing of a MLS Gasket.

Connecting Rods, New Damper and Flexplate for Automatic transmission. All Manual will be charged the appropriate charges and will be balanced to a stock flywheel we have in stock or you will need to send in your Aftermarket in first.

  • Check both wrist pin and crank pin to rod clearances
  • New Upgraded Pistons .10 – .30 inch over – New Pistons, Rings, Pin Retainers weight matched prior to crank balancing
  • New OE Lifters, Lifter Guides, OE Crank Flange Bolts, Updated 9.800 OE Pushrods
  • Crankshaft – Balanced with the Rotational assembly checked for run-out inspected for fatigue. Crankshaft is Polished and ground to .0005 concentricity or less
  • Camshaft – Polished and Inspected
  • New Rod, Main and Cam Bearings
  • Install Rear Main Seal
  • Install New Bed Seals
  • Install New Rear Cover Gasket
  • Install Upper and Lower Oil Pan gaskets
  • Install Pickup Tube O-ring
  • Rear Cover Installed

Upgrades over the Model C include but are not limited to:

  • Torque Plate Honing
  • Full Engine Balancing
  • Harmonic Balancer
  • Head Studs
  • Valve Seats
  • Rear Cover and Pickup Tube
  • Oil Pans
  • Welded Crank Gear

Common Issues With The 6.6L Duramax (and how we fix them)

Head Gaskets- This was the first Duramax engine to use the variable geometry vane turbo It was so rely problematic for the failures with head gaskets .While our business is engines, we also encourage the customers to fix the cooling issues and update the LLY with the larger later year model LBZ fan and radiator. But we will take care of our end. And that is why we make sure that all our Duramax engines come standard with headstuds. So you don’t blow a gasket.

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*If you know your vin number before hand it is very helpful during the quotation period. Please note that this will be required before the engine is built.

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