Metelli PA661 Engine Water Pump

Reliable Engine Water Pump for Mercedes-Benz Models

The Metelli PA661 engine water pump is designed to maintain optimal cooling performance for select Mercedes-Benz vehicles. Engineered with durable materials and precision components, this water pump ensures efficient coolant circulation for models like the C36 AMG, C280, E320, and SL320.

• Includes gasket and O-ring for secure installation
• Aluminium housing for lightweight strength and corrosion resistance
• Cast iron impeller with 4 vanes for effective coolant flow
• Roller/ball bearing with 36mm outside diameter for smooth operation
• New, not remanufactured, ensuring reliable performance

Technical Details and Construction

The Metelli PA661 water pump features an aluminium housing that offers a balance of durability and heat dissipation, critical for maintaining engine temperature. The cast iron impeller, measuring 77mm in outside diameter and equipped with four vanes, is designed to provide consistent coolant flow through the engine’s cooling system. The roller/ball bearing with a 36mm outside diameter supports the impeller shaft, reducing friction and wear for extended service life. This water pump comes new and includes a gasket and O-ring to ensure a proper seal and prevent leaks during installation.

Compatible Mercedes-Benz Models

This engine water pump is compatible with the following Mercedes-Benz vehicles:

• Mercedes-Benz C36 AMG
• Mercedes-Benz C280
• Mercedes-Benz E320
• Mercedes-Benz SL320

Using the Metelli PA661 water pump helps maintain the cooling system’s integrity and prevents overheating issues common in these models.

Common Issues Addressed by This Water Pump

• Engine overheating due to coolant circulation failure
• Coolant leaks from worn or damaged seals
• Reduced cooling efficiency from impeller wear
• Noise or rough operation caused by bearing failure
• Premature engine wear from inadequate temperature control

Installation Notes and Tips

When installing the Metelli PA661 water pump, ensure the gasket and O-ring are properly seated to prevent leaks. It is recommended to inspect the cooling system hoses and thermostat during replacement. Use manufacturer-specified torque settings for mounting bolts to avoid damage to the aluminium housing. Bleed the cooling system after installation to remove air pockets and verify proper coolant flow.

Quality Assurance and Warranty

Metelli manufactures the PA661 water pump to meet OEM standards for fit and function. The new water pump undergoes quality control inspections to ensure reliability and durability. This product includes a gasket and O-ring to support a complete and secure installation. Warranty coverage details should be confirmed with the distributor or installer.