Description

Mitsubishi OEM Thermostat Housing Evo 9 Part #MD363250

Firstly, Buy Mitsubishi OEM Thermostat Housing Evo 9 MD363250 for the CT9A 4G63 cooling system. The Mitsubishi OEM Thermostat Housing Evo 9 MD363250 is a genuine Mitsubishi replacement thermostat case designed for the cooling system of the Mitsubishi Lancer Evolution IX. This component houses the engine coolant thermostat and forms an important part of the 4G63 engine’s coolant circulation system. For Evo 9 owners repairing, restoring, or refreshing an aging cooling system, using the correct OEM thermostat housing helps maintain the factory cooling-system configuration and proper component fitment.

Mitsubishi identifies MD363250 as a “Case, Thermostat” for turbocharged Lancer applications, and parts catalogs list it within the water pipe and thermostat assembly. The Evo 9 thermostat housing is also specifically distinguished from the Evo 8 housing, making correct part-number verification important when ordering replacement cooling-system components.

Mitsubishi OEM Thermostat Housing Evo 9 MD363250

The thermostat housing is an essential part of the engine cooling system because it provides the mounting location for the thermostat and connects the thermostat assembly with the surrounding coolant passages. On the Mitsubishi Lancer Evolution IX, the MD363250 thermostat housing is designed around the CT9A 4G63 application.

A damaged, corroded, cracked, or otherwise compromised thermostat housing can create problems during cooling-system maintenance. Coolant leaks around the thermostat area may also indicate that the housing, gasket, thermostat, or related sealing surfaces require inspection.

Replacing a worn housing with a genuine Mitsubishi component can be especially useful when performing a cooling-system overhaul, replacing a thermostat, rebuilding a 4G63 engine, or restoring an Evo 9 to a factory-style configuration.

Genuine OEM Construction and Factory Fitment

The Mitsubishi OEM Thermostat Housing Evo 9 MD363250 is designed specifically for the applicable Mitsubishi cooling-system arrangement. OEM replacement components are useful when maintaining original mounting points, coolant connections, and factory component compatibility.

Mitsubishi parts information identifies MD363250 as the thermostat case, while MD363254 is listed separately as the thermostat housing gasket and MD363571 as the thermostat for applicable turbocharged Lancer applications.

This means the housing should be considered as one component within the complete thermostat assembly rather than as the thermostat itself.

Evo 9 4G63 Thermostat Housing Application

The MD363250 thermostat housing is associated with the Mitsubishi Lancer Evolution IX and its turbocharged 4G63 engine. Parts catalogs specifically show MD363250 under the Evo 9 CT9A water pipe and thermostat system.

The application is particularly important because the Evo 8 and Evo 9 use different thermostat housing configurations. Multiple Evo parts specialists identify the Evo 9 housing as MD363250 and the Evo 8 housing as 1305A043.

Buy Mitsubishi OEM Thermostat Housing Evo 9 MD363250 for the CT9A 4G63 cooling system. Shop genuine Evo 9 thermostat housing online at Evomotorparts.

Therefore, Evo owners should not assume that an Evo 8 thermostat housing is interchangeable with the Evo 9 housing simply because both vehicles use the 4G63 engine.

Features and Benefits

The Mitsubishi OEM Thermostat Housing MD363250 offers several benefits for Evo 9 maintenance and restoration:

• Genuine Mitsubishi OEM thermostat housing
• Designed for the Mitsubishi Lancer Evolution IX
• Suitable for the turbocharged 4G63 engine application
• Maintains the factory thermostat mounting arrangement
• Provides the correct housing for the applicable coolant circuit
• Useful for cooling-system repairs and restoration
• Suitable for engine rebuild and preventative maintenance projects
• Helps replace a damaged or deteriorated thermostat case
• Correct OEM part-number identification with MD363250

Firstly, replacing a damaged thermostat housing can help address a physical component problem within the cooling system. Secondly, using the correct Evo 9 housing helps avoid unnecessary modifications or compatibility issues. Thirdly, pairing the housing with the appropriate thermostat and gasket provides an opportunity to refresh the complete thermostat assembly during maintenance.

Thermostat Housing, Thermostat and Gasket

The thermostat housing should not be confused with the thermostat itself. The MD363250 is the housing or thermostat case, while Mitsubishi lists the thermostat separately.

For applicable Evo cooling systems, Mitsubishi parts information lists:

• MD363250 — Thermostat Housing / Case
• MD363254 — Thermostat Housing Gasket
• MD363571 — Thermostat
• MD091056 — Water Temperature Gauge Unit
• 1308A012 — Water Temperature Sensor

These components perform different functions within the cooling system and temperature-monitoring system.

When replacing the thermostat housing, inspect the mating surface, gasket, thermostat, bolts, coolant hoses, and surrounding water pipes. Replacing an old gasket at the same time is often appropriate when the housing has been removed.

Product Specifications

Brand: Mitsubishi
Part Number: MD363250
Product Type: Thermostat Housing / Thermostat Case
OEM Status: Genuine Mitsubishi OEM
Vehicle: Mitsubishi Lancer Evolution IX
Chassis: CT9A
Engine: 4G63 Turbo
Function: Houses the engine coolant thermostat and connects it with the cooling-system coolant passages
Related Gasket: MD363254
Category: Engine Cooling System → Thermostat Housing

Mitsubishi’s official parts catalog identifies MD363250 as a thermostat housing for turbocharged Lancer applications, while other OEM catalog sources identify it specifically as Case, Thermostat.

Why Replace an Evo 9 Thermostat Housing?

The thermostat housing is exposed to engine heat, coolant, and repeated temperature cycles throughout the vehicle’s service life. On an older Evo 9, the housing and its sealing surfaces should be inspected whenever the thermostat or related cooling components are removed.

Signs that the housing requires attention can include visible coolant leakage around the thermostat area, damaged sealing surfaces, physical corrosion, cracks, or damage caused during previous servicing. A housing should also be inspected if the thermostat cannot be installed or sealed correctly.

For an Evo 9 undergoing restoration or a 4G63 engine rebuild, replacing questionable cooling-system hardware can help provide a clean foundation for the rest of the cooling system.

Evo 8 vs Evo 9 Thermostat Housing

One of the most important fitment details is the difference between the Evo 8 and Evo 9 thermostat housing. Parts specialists identify 1305A043 as the Evo 8 housing and MD363250 as the Evo 9 housing.

This distinction makes the MD363250 part number especially important when shopping for an Evo thermostat housing online. Always verify the chassis, model year, and existing cooling-system configuration before ordering.

Buy Mitsubishi OEM Thermostat Housing MD363250 Online

If you are looking for a Mitsubishi OEM Thermostat Housing Evo 9 for sale, MD363250 is the OEM part number to verify for the applicable Lancer Evolution IX CT9A 4G63 application. Confirm your vehicle and part number before placing an order, especially if your vehicle has been modified or converted between Evo generations.

Whether you are replacing a damaged housing, installing a new thermostat, rebuilding a 4G63 engine, or restoring an Evo 9 cooling system, the correct thermostat case is an important part of a reliable installation.

At evomotorparts.com, you can shop online for Mitsubishi Evo parts, genuine OEM cooling-system components, 4G63 engine parts, thermostats, gaskets, and other replacement components for your Evolution project.

Frequently Asked Questions

What is Mitsubishi part number MD363250?

MD363250 is a genuine Mitsubishi thermostat housing, also referred to in Mitsubishi parts catalogs as a thermostat case. It is associated with the cooling system of the Lancer Evolution IX.

Does MD363250 fit the Evo 9?

Yes. MD363250 is listed for the Mitsubishi Lancer Evolution IX CT9A with the 4G63 engine.

Is the Evo 9 thermostat housing the same as the Evo 8?

No. Parts sources identify the Evo 8 housing as 1305A043, while the Evo 9 uses MD363250.

Does MD363250 include the thermostat?

MD363250 is the thermostat housing/case. The thermostat itself is listed separately, so verify the contents of the product listing before ordering.

What gasket is used with MD363250?

Mitsubishi lists MD363254 as the thermostat housing gasket associated with this cooling-system assembly.

Can a damaged thermostat housing cause a coolant leak?

Yes. A damaged housing, deteriorated sealing surface, or failed gasket can contribute to coolant leakage. The thermostat, gasket, housing, and surrounding connections should be inspected to identify the actual source.

Is MD363250 suitable for a 4G63 engine rebuild?

It can be suitable for the applicable Evo 9 4G63 cooling-system configuration. Confirm the engine and chassis application before ordering, particularly if the engine or cooling system has been modified.

What should I replace when installing a new thermostat housing?

Inspect the thermostat, housing gasket, coolant hoses, mounting hardware, and surrounding coolant pipes. Replacing the gasket when the housing is removed is an important part of maintaining a proper seal. Maintain the correct factory-style cooling-system configuration on your Mitsubishi Lancer Evolution IX with the genuine Mitsubishi OEM Thermostat Housing MD363250, and shop evomotorparts.com for quality Mitsubishi Evo parts and 4G63 cooling-system components for your next repair, maintenance, or restoration project.

Buy Mitsubishi OEM Thermostat Housing Evo 9 MD363250 for the CT9A 4G63 cooling system. Shop genuine Evo 9 thermostat housing online at Evomotorparts.