Duramax 6.6L

A JASPER Remanufactured Duramax Engine is Your Best Option for Replacement! Here’s Why…

• Duramax blocks are 100% align honed to meet, or exceed, original specifications including the size, shape and alignment of the saddles to prevent crank damage.
• Crankshafts are polished (not machined) to an Ra finish of 10 or less, maintaining OE nitride hardness to ensure long crank life and to prevent broken cranks.
• JASPER’s Duramax Running Complete format includes a 100% Bosch Certified Fuel System (pump and injectors) for the highest quality and best runability.
• Duramax blocks are torque-plate honed to provide cylinder wall geometry that matches the cylinder head, as in final assembly, for improved ring sealing.
• Block and head surface finishes are machined to a 50 – 150 Rz finish to prevent blown head gaskets.
• 100% installation of a nitrided valve train for improved heat resistance to reduce valve guide wear.
• 100% installation of an upgraded JASPER-manufactured, machined steel bell housing block-off plate and fluoroelastomer polymer O-ring to prevent leaks.
• 100% installation of a cooler petcock valve to provide easy drainage of coolant at recommended service intervals.
• Final engine assembly includes an air pressure test to ensure the block and all mating surfaces are leak free.
• Duramax Running Complete format engines, ‘04 and later, include the turbo with VGT solenoid and VGT position sensor.
• Duramax Running Complete format engines are thoroughly dynamometer tested under load with other assessments for your assurance of reliability, including:
• Testing for proper horsepower, boost & oil pressure
• Checking for trouble codes
• Opacity testing (snap & full load)
• Checking for leaks 4X during dynamometer testing, including blacklight leak testing
• Duramax Complete format engines are spin-tested for proper oil pressure, each cylinder undergoes compression testing and each engine is blacklight leak tested.