Performance Water Pump Kit for Mercedes Benz GLK-Class (2013-2015) 3.5L

Complete Water Pump and Accessory Drive Refresh Kit for 2013-2015 Mercedes Benz GLK-Class (X204)

What it Does: The Performance Water Pump Kit replaces fatigued factory cooling and belt-drive components on the 2013-2015 GLK-Class to eliminate coolant leakage, restore hydrodynamic flow, and prevent accessory belt slippage.

The Stock Mercedes Benz GLK-Class Cooling and Drive System Vulnerability

On high-mileage M276 direct-injected engines, the factory mechanical water pump routinely suffers internal seal degradation and shaft bearing play, leading to shaft wobble and progressive coolant weeping from the bleed orifice. Compounding this, the composite thermostat housing becomes brittle from persistent thermal cycling in the compact X204 engine bay, risking sudden cracking and total pressure loss. Worn internal spring dampers inside the accessory belt tensioner also induce belt flutter, accelerating premature pulley failure and uneven belt wear across drive accessories.

The Engineering Solution

This comprehensive service assembly delivers complete thermal and rotational reliability for your cooling system. Built with an upgraded internal bearing race and an OE-grade mechanical seal, the water pump assembly provides zero-cavitation fluid circulation through strict cylinder head passages. Paired with a direct-fit composite thermostat housing and calibrated thermostat, this kit maintains rigid coolant pressure and rapid operating temperature stability. Fresh hydraulic belt dampening and precision-machined pulleys eliminate drive-belt oscillation, restoring baseline factory harmonics.

What's Included

• 1 Mechanical Water Pump Assembly
• 1 Water Pump Gasket
• 1 Engine Coolant Thermostat Housing Assembly with Thermostat
• 1 Serpentine Belt Tensioner Assembly
• 1 Idler Pulley with Mounting Hardware
• 2 Serpentine Drive Belts
• 1 O-Ring

Technical Specifications

Compatibility

• 2013-2015 Mercedes Benz GLK-Class (GLK350) 3.5L V6 Gas Naturally Aspirated

Frequently Asked Questions & Fitment Warnings

Does this fit the X204 GLK-Class?

Yes, this is a direct fit for the 2013-2015 Mercedes Benz GLK-Class equipped with the M276 naturally aspirated 3.5L V6 engine.

Is a complete cooling system vacuum-bleed required during installation?

Yes, pulling a vacuum on the cooling circuit before refilling with factory-specified coolant is mandatory to prevent trapped air pockets in the internal engine blocks of modern direct-injected Mercedes engines.

The Mercedes Benz Precision Standard

Engineered to exact OEM tolerances, this kit maintains the tight tolerances and factory thermal thresholds of the Mercedes-Benz platform without causing erratic coolant temperature sensor readouts or diagnostic trouble codes.