Metelli PA1129 Engine Water Pump

Overview of Metelli PA1129 Engine Water Pump

The Metelli PA1129 engine water pump is designed for reliable cooling system performance in select BMW models. Engineered with durable materials and precision components, this water pump ensures efficient coolant circulation for optimal engine temperature management.

• Includes gasket for secure, leak-free installation
• Aluminium housing for lightweight strength and corrosion resistance
• Brass impeller with 8 vanes for effective coolant flow
• Roller/ball bearing with 34mm outside diameter for smooth operation
• New, not remanufactured, ensuring fresh components and longevity

Technical Details and Construction

The Metelli PA1129 water pump features an aluminium housing that offers a balance of durability and weight savings, contributing to overall engine efficiency. The brass impeller, measuring 70mm in outside diameter and equipped with 8 vanes, is designed to provide consistent coolant flow and resist wear over time. The roller/ball bearing with a 34mm outside diameter supports smooth rotation and reduces friction, enhancing the pump's operational lifespan. This water pump comes complete with a gasket to facilitate a proper seal during installation, minimizing the risk of leaks.

Compatible BMW Models and Applications

This engine water pump is compatible with BMW 745i, 745Li, 760i, and 760Li models. The PA1129 part number ensures precise fitment and performance tailored to these vehicles' cooling system requirements. Using the correct water pump helps maintain engine temperature stability and prevents overheating issues common in these BMW models.

Common Issues Addressed by the Water Pump

• Engine overheating due to coolant circulation failure
• Coolant leaks from worn or damaged seals
• Noise or rough operation caused by bearing wear
• Reduced cooling efficiency from impeller damage
• Engine performance issues related to improper temperature regulation

Installation Notes and Tips

When installing the Metelli PA1129 water pump, ensure the gasket is properly seated to prevent leaks. It is recommended to inspect the cooling system hoses and thermostat during replacement to maintain overall system integrity. Use manufacturer-specified torque settings for mounting bolts and verify coolant levels after installation. Proper installation will help avoid premature failure and maintain engine cooling efficiency.

Quality Assurance and Warranty

The Metelli PA1129 water pump is a new, high-quality replacement part manufactured to meet OEM standards. The use of durable materials such as aluminium and brass, combined with precision bearing design, supports reliable operation. While specific warranty details may vary, Metelli products typically come with a limited warranty covering defects in materials and workmanship, providing confidence in product durability.