2012 Peterbilt 365 ISL-G 8.9 Cummins Remanufactured Long Block Engine
CNG • Dyno Tested • Warranty Included

About This Cummins ISL-G Remanufactured Long Block
Looking for a quality remanufactured long block engine for your 2012 Peterbilt 365? US Engine Production offers premium remanufactured Cummins ISL-G 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 cng 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-G Problems We Address
Our remanufacturing process specifically addresses these known issues with Cummins ISL-G 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-G 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-G Remanufactured Engine
A remanufactured Cummins ISL-G 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-G 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
"Needed an engine fast for my work truck. They had it in stock and shipped same day. Engine is running perfectly. Highly recommend!"
"Excellent quality engine at a great price. The team was very helpful in finding the right engine for my truck. Shipped fast and arrived in perfect condition."
"I've bought several engines from US Engine Production over the years. Always top quality and their customer service is the best in the business."
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-G 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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More Peterbilt 365 Engines
Other model years available for the Peterbilt 365
2013 Peterbilt 365
Cummins ISL 8.9 8.9L
2016 Peterbilt 365
Cummins ISL-G 8.9L
2023 Peterbilt 365
PACCAR MX-13 12.9L
2013 Peterbilt 365
Cummins ISX 11.9 11.9L
2016 Peterbilt 365
Cummins ISX 11.9 11.9L
2011 Peterbilt 365
Caterpillar C13 12.5L
2013 Peterbilt 365
Cummins ISX 11.9 11.9L
2014 Peterbilt 365
PACCAR MX-13 12.9L
Vehicles with Cummins ISL-G Engine
This same engine is also available for these vehicles
2011 Kenworth T800
ISL-G 8.9L CNG
2014 Peterbilt 384
ISL-G 8.9L CNG
2015 Autocar LLC. Xspotter On Road
ISL-G 8.9L CNG
2011 Peterbilt 320
ISL-G 8.9L CNG
2017 Autocar LLC. Xpeditor
ISL-G 8.9L CNG
2012 Crane Carrier Low Entry
ISL-G 8.9L CNG
2014 Freightliner M2 112
ISL-G 8.9L CNG
2007 Crane Carrier Centurion
ISL-G 8.9L CNG
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Browse other Peterbilt models with remanufactured engines
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2004 Peterbilt 379
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1986 Peterbilt 349
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2011 Peterbilt 367
PACCAR MX 12.9L
2016 Peterbilt 389
PACCAR MX-13 12.9L
1983 Peterbilt 362
Detroit Diesel 6V-92N 9.0L
2001 Peterbilt 385
Cummins M11 10.8L
2016 Peterbilt 367
Cummins ISX 15.0 15.0L
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1993 Ford LN7000
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Buy Cummins ISL-G Remanufactured Long Block Engines
US Engine Production is your trusted source for remanufactured Cummins long block engines. Our ISL-G 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
