Description

Genuine OEM Mitsubishi Crankshaft for 2008–2015 Mitsubishi Lancer Evolution X 4B11T

Firstly, Buy Mitsubishi OEM Crankshaft Evo X 4B11T 1100A139 online. The Mitsubishi OEM Crankshaft Evo X 4B11T 1100A139 is a genuine Mitsubishi factory replacement crankshaft designed for the 4B11T engine used in the 2008–2015 Mitsubishi Lancer Evolution X. Part number 1100A139 is listed as the OEM crankshaft for the Evolution X and is available as a direct-fit replacement for the factory engine.

The crankshaft is a critical part of the 4B11T rotating assembly. It converts the pistons’ up-and-down movement into rotational motion. That rotation is then transferred through the flywheel and drivetrain to produce vehicle movement.

When an Evo X engine is being rebuilt, a damaged crankshaft can make the entire engine unusable until the rotating assembly is properly repaired. A genuine Mitsubishi replacement provides an OEM solution for owners who want to restore the engine with factory components.

Mitsubishi OEM Crankshaft Evo X 4B11T 1100A139

The Mitsubishi OEM Crankshaft Evo X 4B11T 1100A139 is a genuine Mitsubishi component rather than an aftermarket forged or billet crankshaft. Current Evo-specific suppliers identify 1100A139 as the factory replacement crankshaft for the 2008–2015 Evolution X.

STM Tuned lists the crankshaft as a genuine OEM Mitsubishi factory replacement and identifies the fitment as CZ4A 2008–2015 Evolution X. The purchase includes one crankshaft.

This makes 1100A139 a strong choice for an OEM-focused 4B11T engine rebuild. It can also be used when replacing a damaged original crankshaft or assembling a replacement engine.

Genuine Mitsubishi 4B11T Crankshaft

The Evolution X uses the turbocharged Mitsubishi 4B11T 2.0-liter engine. Its crankshaft works with the pistons, connecting rods, main bearings, thrust bearings, and other components to form the engine’s rotating assembly.

A crankshaft experiences significant loads during engine operation. Proper condition and correct bearing clearances are therefore essential.

Firstly, a genuine Mitsubishi crankshaft maintains the factory application.

Secondly, the 1100A139 part number provides a clear reference when ordering an Evo X replacement crankshaft.

Thirdly, using an OEM crankshaft can be a practical choice when rebuilding a 4B11T to factory specifications.

2008–2015 Mitsubishi Evo X Fitment

The 1100A139 crankshaft is listed for the Evolution X platform throughout the 2008–2015 production range. Current fitment information includes:

• 2008 Mitsubishi Lancer Evolution X
• 2009 Mitsubishi Lancer Evolution X
• 2010 Mitsubishi Lancer Evolution X
• 2011 Mitsubishi Lancer Evolution X
• 2012 Mitsubishi Lancer Evolution X
• 2013 Mitsubishi Lancer Evolution X
• 2014 Mitsubishi Lancer Evolution X
• 2015 Mitsubishi Lancer Evolution X
• Evolution X GSR
• Evolution X MR
• Evolution X SE
• Evolution X Final Edition
• CZ4A chassis
• 4B11T turbocharged engine

Extreme PSI’s current catalog provides year-by-year fitment from 2008 through 2015 and lists the GSR, MR, and SE versions. Mitsubishi OEM parts listings also identify 1100A139 as a genuine Mitsubishi crankshaft.

Always confirm the part number with your VIN when ordering an expensive engine component, especially for imported or modified vehicles.

OEM 86mm Crankshaft for Evo X

Current product listings describe the 1100A139 as an OEM 86mm crankshaft assembly for the 2008–2015 Evolution X 4B11T. Extreme PSI specifically identifies it as an OEM 86mm crankshaft.

The factory crankshaft is different from aftermarket stroker crankshafts. Performance manufacturers offer longer-stroke crankshafts for 4B11T builds designed to increase engine displacement. Those products are intended for different applications.

If your goal is to maintain the factory 4B11T configuration, the OEM 1100A139 is the appropriate type of crankshaft to consider.

Why Replace the Evo X Crankshaft?

A crankshaft may need replacement after serious engine damage or when inspection shows that the original component is no longer suitable for reuse.

Common reasons include:

• Main-bearing failure
• Connecting-rod bearing failure
• Damaged crankshaft journals
• Excessive journal wear
• Crankshaft runout
• Engine seizure
• Severe oil-pressure failure
• Major engine rebuild
• Damaged rotating assembly
• Restoring an Evo X engine

A crankshaft should be professionally inspected before installation. Visual inspection alone is not enough.

Journal dimensions, runout, bearing clearances, and the condition of the engine block should all be checked during an engine rebuild.

Evo X Crankshaft and Bearing Selection

The crankshaft does not work by itself. It relies on correctly selected main and thrust bearings.

Mitsubishi OEM main bearings are available separately for the Evo X. STM Tuned notes that bearing selection may require confirmation because the upper and lower bearings can have different part numbers, and the correct size should be confirmed by VIN and engine measurements.

Thrust bearings are also separate components. Current OEM listings identify 1052A698 as an Evo X crankshaft thrust-bearing application.

During a rebuild, the engine builder should measure the crankshaft and block before selecting final bearing sizes. This helps establish the correct oil clearances for the completed engine.

Related Mitsubishi 4B11T Engine Parts

The 1100A139 crankshaft is commonly installed as part of a larger engine rebuild. Other components may need inspection or replacement at the same time.

Related Evo X engine parts include:

• OEM main bearings
• OEM thrust bearings
• Connecting-rod bearings
• Pistons
• Connecting rods
• Crankshaft key
• Crankshaft sensing ring
• Crankshaft pulley
• Front crankshaft seal
• Rear main seal
• Oil pump
• Timing chain
• Timing guides
• Chain tensioner

The current Evo X OEM crankshaft catalog also lists the 1130A024 crankshaft key, 1865A100 crankshaft sensing ring, and other related components separately.

Replacing related wear items during an engine rebuild can help avoid having to disassemble the engine again later.

OEM Replacement for Engine Rebuilds

The 1100A139 is not an aftermarket stroker crankshaft. It is a genuine Mitsubishi OEM replacement.

That distinction is important for owners building a factory-style Evo X engine. Aftermarket options include billet and forged stroker crankshafts with longer strokes and different performance objectives.

The OEM Mitsubishi crankshaft is better suited to an engine rebuild where maintaining the original 4B11T configuration is the priority.

It can also be a practical replacement for an original crankshaft that has suffered damage and cannot safely be reused.

Crankshaft Inspection Before Installation

Even when purchasing a brand-new OEM crankshaft, the complete engine assembly should be measured before final installation.

The engine block should be checked for main-bore condition. The crankshaft should be inspected for journal dimensions and runout. Bearing clearances should then be verified during assembly.

This is particularly important after an engine failure. If the original engine experienced bearing damage or oil starvation, other internal components may also have been affected.

A qualified machine shop or experienced 4B11T engine builder should perform these checks before final assembly.

What’s Included?

The product is sold as one genuine Mitsubishi crankshaft.

What’s included:

• 1 × Mitsubishi OEM crankshaft
• Part number 1100A139

The crankshaft bearings, thrust bearings, crankshaft key, sensing ring, seals, and other related components are separate unless specifically stated in your product listing. Current OEM listings confirm that the purchase includes one crankshaft.

Buy Mitsubishi Evo X Crankshaft Online

If you’re searching for a Mitsubishi Evo X crankshaft for sale, the genuine 1100A139 is a factory replacement option for the 4B11T engine. It is suitable for OEM-style engine rebuilding, crankshaft replacement, and factory restoration applications.

When you buy online, always verify your vehicle’s year, model, engine, chassis, and VIN before ordering. This is especially important for modified Evo X vehicles or engines that have been swapped between cars.

At evomotorparts.com, you can shop Mitsubishi OEM engine parts and other genuine Evo components for the 4B11T platform, including oil pumps, bearings, timing components, seals, and other internal engine parts.

Frequently Asked Questions

What is the OEM crankshaft part number for the Evo X?

The genuine Mitsubishi OEM crankshaft for the Evolution X 4B11T is 1100A139.

Does 1100A139 fit the 4B11T?

Yes. 1100A139 is listed as the genuine Mitsubishi crankshaft for the Evolution X 4B11T.

What years does the 1100A139 crankshaft fit?

Current listings identify it for 2008–2015 Mitsubishi Lancer Evolution X models.

Does it fit both Evo X GSR and MR?

Yes. Current fitment data lists both GSR and MR Evolution X models.

Is 1100A139 a genuine Mitsubishi crankshaft?

Yes. Mitsubishi OEM parts suppliers identify 1100A139 as a genuine Mitsubishi factory replacement crankshaft.

Is this a stroker crankshaft?

No. The 1100A139 is the OEM factory crankshaft. It is different from aftermarket stroker crankshafts designed to increase 4B11T displacement.

Does the crankshaft include bearings?

No. The product is sold as one crankshaft. Main bearings and thrust bearings are separate components and should be selected based on the engine’s measurements and applicable Mitsubishi specifications.

Should I check the crankshaft before installing it?

Yes. Crankshaft journals, runout, bearing clearances, and the engine block should be checked by a qualified engine builder before final assembly. If you’re rebuilding a 4B11T, replacing a damaged crankshaft, restoring an Evolution X, or building an OEM-spec engine, the Genuine OEM Mitsubishi Crankshaft 1100A139 provides the factory replacement solution for the 2008–2015 Mitsubishi Lancer Evolution X, so shop and order your genuine Mitsubishi crankshaft and other Mitsubishi Evo parts from evomotorparts.com today.