2012 Peterbilt 365 ISL 8.9 8.9 Cummins Remanufactured Long Block Engine
DIESEL • Dyno Tested • Warranty Included

About This Cummins ISL 8.9 Remanufactured Long Block
Looking for a quality remanufactured long block engine for your 2012 Peterbilt 365? US Engine Production offers premium remanufactured Cummins ISL 8.9 long block engines that meet or exceed OEM specifications. Our remanufactured long blocks are completely disassembled, cleaned, inspected, and rebuilt using new components where necessary.
Every remanufactured diesel long block undergoes rigorous dynamometer testing to ensure optimal performance. With over 40 years of experience and a database of 473,000+ engines, we're America's trusted source for remanufactured long block engines.
Common Cummins ISL 8.9 Problems We Address
Our remanufacturing process specifically addresses these known issues with Cummins ISL 8.9 engines:
- EGR cooler failures leading to coolant leaks
- Turbocharger actuator issues causing reduced power
- Fuel injector problems resulting in rough idle
- Head gasket failures from overheating
- Crankshaft position sensor failures
- Oil dilution from regeneration cycles
Our technicians use updated components and improved techniques to prevent these common failures in your remanufactured engine.
Engine Specifications
Peterbilt Vehicle Compatibility
Cummins ISL 8.9 engines are commonly found in these Peterbilt vehicles:
- Model 579 highway trucks
- Model 389 classic trucks
- Model 567 vocational trucks
- Model 520 refuse trucks
- Model 348 medium-duty trucks
- Model 337 delivery trucks
What's Included With Your Remanufactured Long Block
Complete long block assembly with all new/remanufactured components
Core Components
- Remanufactured Engine Block
Cleaned, inspected, and machined to OEM specifications
- New Pistons & Rings
Premium quality pistons with new ring sets
- Reground Crankshaft
Precision ground to factory tolerances
- New Main Bearings
OEM-spec main bearings for proper clearance
- New Rod Bearings
Connecting rod bearings replaced
- New Camshaft
New or reground camshaft (where applicable)
Timing Components
- New Timing Chain/Belt
Complete timing set included
- New Timing Gears/Sprockets
All timing components replaced
- New Tensioners & Guides
Timing tensioners and guides included
Valvetrain
- New Lifters/Tappets
Hydraulic or solid lifters replaced
- Reconditioned Cylinder Head(s)
Heads resurfaced and pressure tested
- New Valve Seals
All valve stem seals replaced
Seals & Lubrication
- New Oil Pump
Oil pump replaced for proper lubrication
- New Gasket Set
Complete gasket set included
- New Front & Rear Seals
All main seals replaced
- New Freeze Plugs
Core plugs replaced
Frequently Asked Questions: 2012 Peterbilt 365 Cummins ISL 8.9 Remanufactured Engine
A remanufactured Cummins ISL 8.9 8.9L engine typically costs 40-60% less than a brand new engine from the dealer, making it the most cost-effective option for your 2012 Peterbilt 365. The exact price depends on the specific configuration, condition of your core return, and current availability. For an accurate, no-obligation quote on a Cummins ISL 8.9 remanufactured long block for your 2012 Peterbilt 365, call our engine specialists at (631) 991-7700 or request a quote online. We offer competitive pricing and fast delivery.
What Our Customers Say
Trusted by thousands of customers nationwide
"Was worried about buying a remanufactured engine but these guys made it easy. Engine runs like new and the warranty gives me peace of mind."
"Fast shipping and the engine was exactly as described. Installation went smoothly and it's been running great for 6 months now."
"Great experience from start to finish. The price was competitive and the quality exceeded my expectations. Will definitely buy again."
Warranty & Quality Assurance
Core Return Required: A refundable core deposit is required. We provide a prepaid shipping label for your old engine core return.
Call us for the best price on this Cummins ISL 8.9 remanufactured long block. Prices may vary based on configuration.
Email: [email protected]
Why US Engine Production?
- 40+ years of experience
- 473,000+ engines in database
- Nationwide shipping
- Expert technical support
- Quality guaranteed
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Other model years available for the Peterbilt 365
2018 Peterbilt 365
PACCAR MX-13 12.9L
2017 Peterbilt 365
PACCAR MX-13 12.9L
2020 Peterbilt 365
PACCAR MX-13 12.9L
2013 Peterbilt 365
Cummins ISM 10.8 10.8L
2011 Peterbilt 365
Caterpillar C13 12.5L
2022 Peterbilt 365
PACCAR MX-13 12.9L
2023 Peterbilt 365
PACCAR PX-9 8.9L
2011 Peterbilt 365
Cummins ISX 11.9 11.9L
Vehicles with Cummins ISL 8.9 Engine
This same engine is also available for these vehicles
2007 Country Coach Motorhome Inspire
ISL 8.9 8.9L DIESEL
2015 Freightliner 114SD
ISL 8.9 8.9L DIESEL
2008 Pierce Mfg. Inc. Saber
ISL 8.9 8.9L DIESEL
2022 International 7500
ISL 8.9 8.9L DIESEL
2007 Peterbilt 357
ISL 8.9 8.9L DIESEL
2010 Emergency One Emergency One
ISL 8.9 8.9L DIESEL
2013 Emergency One Emergency One
ISL 8.9 8.9L DIESEL
2013 Autocar LLC. Xpeditor
ISL 8.9 8.9L DIESEL
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1987 Peterbilt 359
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2001 Peterbilt 379
Cummins 6BT5.9 5.9L
1986 Peterbilt 362
Cummins N14 14.0L
1982 Peterbilt 359
Caterpillar 3406 14.6L
1998 Peterbilt 330
Cummins 6CT8.3 8.3L
2002 Peterbilt 379
Caterpillar 3406 14.6L
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Explore other Cummins engine models we carry
1991 Western Star 4800
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1985 International F9370
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2014 Ram 3500
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1981 Oshkosh Motor Truck Co. Highland
Cummins N14 14.0L DIESEL
2015 Peterbilt 386
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1998 Freightliner MB Line
Cummins B5.9G 5.9L CNG
1997 Freightliner FL60
Cummins 6CT8.3 8.3L DIESEL
1990 GMC P3500
Cummins 3.9L DIESEL
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Other diesel engines with similar specifications
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Buy Cummins ISL 8.9 Remanufactured Long Block Engines
US Engine Production is your trusted source for remanufactured Cummins long block engines. Our ISL 8.9 remanufactured long blocks for Peterbilt vehicles include all new internal components including pistons, rings, bearings, timing components, and gaskets. Every long block is dyno tested and backed by our 1-year, unlimited mileage warranty. Whether you need a replacement long block engine for your 2012 Peterbilt 365or any other application, our team of experts is ready to help. Call us at (631) 991-7700 or email [email protected] for a free quote today.
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WARNING: Crude oil, gasoline, diesel fuel and other petroleum products can expose you to chemicals including toluene and benzene, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.p65warnings.ca.gov
