Mishimoto Thermostatic Engine Oil Cooler Kit

2007–2011 Jeep Wrangler JK 3.8L V6

Part #: MMOC-WRA-07TBK

Overview

The Mishimoto Thermostatic Engine Oil Cooler Kit is a precision-engineered cooling solution designed specifically for the Jeep Wrangler JK models equipped with the 3.8L V6 engine from 2007 to 2011. This kit helps maintain optimal oil temperatures during demanding driving conditions, such as off-road trails, desert driving, or heavy towing, where engine oil can quickly overheat and degrade. By regulating oil temperature effectively, it protects your engine from premature wear and ensures consistent performance and reliability.

Built for Jeep enthusiasts who demand durability and efficiency, this direct-fit kit integrates seamlessly with your vehicle’s existing systems, offering a straightforward installation without the need for modifications. It is an essential upgrade for Wrangler owners looking to enhance engine longevity and maintain peak performance in extreme environments.

Key Features

The Mishimoto Thermostatic Oil Cooler Kit combines advanced engineering with high-quality materials to deliver superior oil cooling performance. Key features include:

• Thermostatic billet aluminum oil filter sandwich plate for precise oil temperature regulation
• 19-row stacked-plate oil cooler designed for maximum heat dissipation
• Premade braided stainless steel oil lines with durable -AN fittings for leak-free, abrasion-resistant connections
• JK-specific mounting brackets for a direct-fit, hassle-free installation
• Increases oil capacity by 0.75 quarts to improve cooling efficiency
• Reduces oil temperatures by up to 40°F while maintaining minimal pressure drop
• Durable black powder-coated finish for corrosion resistance and a rugged appearance
• Compatible with Mishimoto Jeep JK transmission cooler kit and all-aluminum radiator for a comprehensive cooling system
• Includes all necessary hardware and detailed instructions for quick installation
• Backed by the Mishimoto Lifetime Warranty for long-term reliability

Construction & Design

This oil cooler kit is crafted from premium materials engineered to withstand harsh off-road environments and extended use. The 19-row stacked-plate cooler is made from lightweight yet durable aluminum, providing excellent thermal conductivity and efficient heat exchange to keep oil temperatures in check. The billet aluminum sandwich plate features an integrated thermostatic valve that intelligently routes oil through the cooler only when necessary, allowing the engine to reach and maintain optimal operating temperature quickly.

High-quality braided stainless steel oil lines with -AN fittings ensure superior durability, resistance to abrasion, heat, and pressure, while the black powder-coated finish protects components from corrosion and complements the Jeep Wrangler’s rugged styling.

Installation & Fitment

Designed as a direct bolt-on upgrade for Jeep Wrangler JK models from 2007 to 2011 with the 3.8L V6 engine and either the 42RLE or NSG370 transmissions, this kit requires no modifications or custom fabrication. The application-specific mounting brackets and premade oil lines simplify installation, which can typically be completed with basic hand tools by professional mechanics or experienced enthusiasts alike.

The thermostatic sandwich plate ensures oil is cooled only when necessary, maintaining proper oil viscosity and maximizing engine protection under all driving conditions.

What's Included

• Thermostatic billet aluminum oil filter sandwich plate
• 19-row stacked-plate black powder-coated oil cooler
• Premade braided stainless steel oil lines with -AN fittings
• Application-specific mounting brackets
• All necessary installation hardware
• Detailed installation instructions

Ideal For

This oil cooler kit is ideal for Jeep Wrangler JK owners who frequently drive in extreme conditions such as off-road trails, desert dunes, or heavy towing. It is also perfect for enthusiasts seeking to enhance engine reliability and longevity by maintaining optimal oil temperatures. When paired with Mishimoto’s transmission cooler and all-aluminum radiator, it forms a comprehensive cooling system that maximizes your Jeep’s performance and durability.

Mishimoto is a performance cooling brand offering aluminum radiators, intercoolers, oil coolers, hoses, and supporting hardware built to manage heat on hard-driven street and track vehicles. For boosted setups and towing/off-road rigs alike, Mishimoto upgrades are designed to increase cooling capacity and reliability where factory systems can become a limitation.