Current Lead Times: 1-3 Weeks on Most Engines; 3-4 Days on Heads – *call us for more exact lead times for your specific build 
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6.6L 2011-2016 Duramax LML Short Block Daily Driver Diesel Crate Engine Choate Performance

SKU: CEP66LMLSD
UPC : 659657029096

$8,500.00$10,000.00

CHOATE 6.6L Short Block Daily Driver LML Engine 2011-2016 – Duramax Diesel Engine. Manufacturer: CHOATE Engineering Performance CHOATE Part Number: CEP66LMLSD

This 6.6L LML Duramax Short Block Build Includes:

  • Full CNC blue print machining on the 6.6L Engine, (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.
  • Check both wrist pin and crank pin to rod clearances
  • All Manual Transmission Engines will incur additional charges and will be balanced to a stock flywheel.
  • Or if you are using an your Aftermarket flywheel please send in to Choate
  • New Upgraded Pistons .10 – .30 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
  • New Pushrods
  • 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

CHOATE Engineering Performance Crate Engine Features :

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

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.

Optional Parts are not installed. Optional parts are covered under the manufacturer’s warranty and not by CHOATE.

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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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