BMWs are well-known for their problematic cooling systems, which are often a catalyst forirreversible engine damage and a hefty repair bill. The coolant expansion tanka crucialcomponent responsible for holding hot engine coolant under high pressureis a common cause of cooling system issues. Unfortunately, BMW chose to manufacture the factory E9X N55 expansion tank out of plastic. After years of exposure to high coolant temperatures, ambient engine bay heat, and chemical-richantifreeze, the plastic degrades, eventually weakening enough to fail catastrophically.
With this issue in mind, our team of BMW enthusiasts engineeredthe ultimate cooling system upgradefor E82/88 andE90/92/93owners: a heavy-duty expansion tank built to last! Crafted fromdurable 5052 TIG-welded aluminum,this tank resists high temperatures and pressures without degrading over time. Unlike the fragile OEM plastic tank, Turners design eliminates the risk of cracking, leaking, or failure. Upgrade to our Heavy DutyAluminum Expansion Tank Kit and say goodbye to expansion tank issues for good!
To guarantee exact fitment, the upgraded tank wasdesigned using advanced 3D CAD modeling. All bungs, nipples, and fittings areprecision-machinedto ensure a secure seal with factory hose ends. Unlike other aftermarket options, this tankmaintains the factory coolant capacity and includes ourlaser-cutlogo plate at the top, providing an accurate fill level.Internal baffles are incorporated to prevent fluid cavitation, eliminating air pockets in the cooling system and avoiding false coolant level warnings during spirited driving.
Engineered for high-performance builds and daily drivers alike, this expansion tank boasts apremium wrinkle black powder coat finishfor a clean "OEM+" aesthetic. This tough coating not only enhances appearance but also protects against corrosion for long-term durability. The kit includes a silicone overflow hose, a high-quality level sensor, and an OE expansion tank cap, offering a complete cooling system upgrade.Avoid the risks of the factory expansion tankupgrade your N55-equipped BMWtoday and drive with confidence!
Features & Benefits:
- Durable 5052 TIG-Welded Aluminum Construction: Ensures long-term reliability and eliminates expansion tank failure.
- Premium Wrinkle Black Powder Coat Finish: Offers an "OEM+" appearance while preventing corrosion.
- Factory Coolant Capacity Retention: Maintains the same coolant level as the original design.
- Laser-Cut Turner Logo Plate: Provides a clear and accurate fill level indicator.
- Internal Baffles: Prevent the introduction of air pockets during high-performance driving.
- Precision-Machined External Bungs and Fittings: Ensure a perfect fit for factory hose connections.
Kit Includes:
- Turner Motorsport Aluminum Expansion Tank
- Performance Silicone Coolant Overflow Hose
- Aluminum Coolant Bleeder Screw
- Ball Stud
- 6mm Fitting
- Expansion Tank Cap
- Coolant Level Sensor
Product Development:
Our Heavy Duty Aluminum Expansion Tank wasdesigned, engineered, tested, and quality inspected by our Research & Development team. Our development process includes leading-edge producttechnology:FARO laser scanning for reverse engineering and quality inspection, SolidWorks 3D CAD modeling, rapid prototyping utilizing our in-house 3D printer, and rigorous long-term product testing.
Installation:
To aid in the installation process, we'veassembled a start-to-finishinstallation guide, including detailed instructions on removing your factory cooling expansion tank and associated components.
Click HERE for Installation Instructions
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