Mitsubishi OEM Engine Oil Jet Check Valve for Evo 7/8/9/X (MD372046)

Description

The Mitsubishi OEM Engine Oil Jet Check Valve (MD372046) is a genuine factory replacement component designed for the engine oil squirter system used in Mitsubishi Lancer Evolution 7, Evolution 8, Evolution 9, and Evolution X applications. Also commonly referred to as an oil jet check valve, piston oil jet check valve, or oil squirter check valve, this small but important engine component plays a critical role in maintaining proper lubrication of the pistons and lower engine assembly.

The oil jet system is designed to direct engine oil toward the underside of the pistons, helping provide additional cooling and lubrication during engine operation. The MD372046 check valve works as part of this system, helping control oil flow through the piston oil jet circuit. Maintaining properly functioning oil jet check valves is particularly important on high-performance turbocharged Mitsubishi engines where the engine may operate under elevated cylinder temperatures, increased boost pressure, and higher RPM.

This is a genuine Mitsubishi OEM replacement part, manufactured to the original factory specifications for proper fitment and operation. Using the correct OEM check valve can be especially important during an engine rebuild, short-block assembly, piston replacement, or complete 4G63/4B11 engine overhaul.

The MD372046 is listed for Mitsubishi Lancer Evolution VII, VIII, IX, and Evolution X applications. Current OEM parts references identify it as an oil jet/check valve used with the piston lubrication system on both the 4G63 and 4B11T engine platforms.

Product Details

• Brand: Mitsubishi OEM
• Part Number: MD372046
• Product: Engine Oil Jet Check Valve
• Also Known As: Oil Squirter Check Valve / Piston Oil Jet Check Valve
• Application: Mitsubishi Lancer Evolution
• Fitment: Evo 7 / Evo 8 / Evo 9 / Evo X
• Engine Applications: 4G63 / 4B11T
• Condition: Genuine OEM Replacement
• Installation Location: Engine Cylinder Block / Piston Oil Jet System
• Sold: Individually
• Full Set: 4 valves are required for a complete four-cylinder replacement.

Designed for Proper Piston Lubrication

The piston oil jet system is an important part of the lubrication and thermal-management system inside the engine. Oil is directed toward the underside of the pistons to assist with cooling and lubrication during operation. The check valve helps regulate the oil flow through the oil jet circuit and is an integral part of the factory engine design.

A worn, damaged, contaminated, or malfunctioning check valve can compromise the operation of the oil jet system. For this reason, replacing questionable components with genuine Mitsubishi OEM parts is recommended when rebuilding or servicing an Evo engine.

Ideal for Engine Rebuilds

The MD372046 oil jet check valve is an excellent replacement component for engine builders and Evo owners performing major engine work. It can be installed during a complete engine rebuild, short-block assembly, piston replacement, cylinder block service, or preventative maintenance.

When rebuilding a 4G63T Evo 7/8/9 engine or a 4B11T Evo X engine, replacing the oil jet check valves while the block is apart can provide additional peace of mind and help ensure the piston lubrication system is operating as intended.

This component is also useful when restoring an Evo engine to OEM specifications or replacing individual oil jet check valves that have become damaged or otherwise require replacement.

Evo 7 / 8 / 9 Compatibility

For the Mitsubishi Lancer Evolution VII, VIII, and IX, the MD372046 is used with the 4G63 engine’s piston oil jet system. OEM parts listings identify the component as the oil jet check valve associated with the cylinder block assembly.

Evo X Compatibility

The same MD372046 part number is also used on the Mitsubishi Lancer Evolution X with the 4B11T engine. Mitsubishi Evo X cylinder-block parts references list MD372046 as the oil jet check valve, separate from the 1228A012 oil jet/squirter itself.

Genuine Mitsubishi OEM Quality

For a high-performance turbocharged engine such as the 4G63T or 4B11T, using genuine OEM internal engine components can be an important part of a reliable rebuild. The Mitsubishi OEM MD372046 is manufactured for the intended application and provides the correct design and fitment for the factory piston oil jet system.

Whether you’re refreshing an original engine, rebuilding a performance short block, replacing pistons, or assembling a complete Evo engine, the Mitsubishi OEM MD372046 Engine Oil Jet Check Valve is a quality replacement component for maintaining the proper operation of the engine’s piston cooling and lubrication system.

Note: This part is sold individually. A complete replacement of the four-cylinder oil jet check valves requires 4 pieces. Always verify the part number and application before ordering.