Mitsubishi 4B12 2.4L L4 Remanufactured Engine – 2007-2015
Original price was: $5,049.00.$4,049.00Current price is: $4,049.00.
Block Cast: 4B12
Dual VVT MIVEC
Restore peak power and reliability with a premium Mitsubishi 4B12 Remanufactured Engine. Precision-engineered to meet or exceed OEM performance specifications, this 2.4L DOHC long block features thermal decontamination, CNC deck machining, 100% new wearable internal components, and live-run SIM testing.
- ✔ Valvetrain: DOHC 16-Valve with Dual VVT MIVEC
- ✔ Testing Quality: Hot SIM spun and fully pressurized for compression verification
- ✔ Vehicle Application: 2008–2013 Outlander & 2009–2015 Lancer (2.4L L4 2360cc)
High-Performance Mitsubishi 4B12 Remanufactured Engine
If you are sourcing an OEM-grade replacement powertrain, every Mitsubishi 4B12 Remanufactured Engine from Mechrontech delivers original equipment quality, enhanced durability, and precision machining. Designed specifically for 2007–2015 Mitsubishi 2.4L inline-four platforms, this long-block assembly is built to eliminate factory wear points and provide long-term operational peace of mind. Browse our full line of remanufactured engines for additional B2B automotive solutions.
4B12
Cast # 4B12 / Aluminum
2.4L (2360cc)
146.0 cu. in. / Inline-4
DOHC 16-Valve
Dual VVT with MIVEC
250 lbs
36 x 36 x 36 in.
Why Choose Our Mitsubishi 4B12 Remanufactured Engine?
Unlike standard used or pulled engines that carry unknown mileage risks, a true remanufactured unit undergoes complete restoration back to zero-hour standards. The engineering workflow for each Mitsubishi 4B12 Remanufactured Engine includes:
1. Thermal Cleaning & Chemical Bath
The aluminum block and cylinder head undergo high-temperature thermal baking and chemical baths to strip away all baked-on carbon, oil sludge, and internal surface oxidation.
2. Magnaflux & Crack Inspection
All casting structures are tested using dye penetrant and Magnaflux magnetic testing to verify that no hairline cracks or structural stress fractures exist within the cylinder walls.
3. CNC Deck Machining & Boring
Mating surfaces are precision CNC surfaced to guarantee optimal micro-inch finish tolerances, ensuring long-lasting head gasket sealing under elevated engine temperatures.
4. 100% Brand-New Wear Components
Every single wearable item is replaced with brand-new parts, including main bearings, rod bearings, pistons, rings, valve lifters, high-flow oil pump, Viton™ valve stem seals, freeze plugs, and full timing chain assembly with tensioners.
Automated SIM Testing Protocol
Quality assurance is central to our production standards. Prior to crate packaging, every Mitsubishi 4B12 Remanufactured Engine is placed on an automated SIM testing rig:
- Pressurized Oil Flow Verification: Oil is continuously circulated at operational PSI to confirm proper distribution to all cam journals and crankshaft bearings.
- Cylinder Compression Balance: The engine is cold-spun at target RPMs to verify identical compression numbers across all four cylinders.
- Valve Seal Integrity: Dual VVT MIVEC operation is checked under rotation to prevent oil starvation or timing lag upon initial start-up.
Vehicle Compatibility for the Mitsubishi 4B12 Remanufactured Engine
This long-block engine is directly compatible with the following vehicle models featuring the 2360cc 2.4L DOHC gasoline engine:
| Year Range | Make | Model | Engine Details |
|---|---|---|---|
| 2008 – 2013 | Mitsubishi | Outlander | L4 2.4L 2360cc (Dual VVT / MIVEC) |
| 2009 – 2015 | Mitsubishi | Lancer | L4 2.4L 2360cc (Dual VVT / MIVEC) |
Installation & Initial Break-In Guidelines
To maximize service life prior to starting your Mitsubishi 4B12 Remanufactured Engine, certify that proper installation steps are completed:
- Cooling System Flush: Always clean or replace the radiator and oil cooler lines to prevent debris from previous engine failures from circulating back into the new assembly.
- Fluid Priming: Fill with manufacturer-recommended engine oil and manually prime the lubrication system prior to first ignition.
- Break-In Schedule: Run non-synthetic break-in oil for the first 500 miles, avoiding prolonged high-RPM highway cruising to allow piston rings to properly seat against cylinder walls.
Full Technical Attributes
| OEM Manufacturer | Mitsubishi |
| Engine Code / Casting # | 4B12 |
| Engine Type & Valvetrain | 2.4L Inline-4 DOHC 16-Valve (Dual VVT with MIVEC) |
| Block Material | Aluminum |
| Main Bearing Cap Bolt Quantity | 2-Bolt |
| Fuel Grade | Gasoline (Premium Recommended) |
| Dimensions & Weight | 36″ x 36″ x 36″ | 250 lbs |
Inquire About Freight Delivery & Core Return
For questions regarding core exchange requirements or freight shipping rates when ordering a Mitsubishi 4B12 Remanufactured Engine, please reach out to our team through the Mechrontech contact portal.
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