DIY Mini Cooper S R56 Coolant Pump Replacement Guide

Introduction

Welcome back to the Simple Corrigan channel! Today, we're tackling the replacement of the coolant pump on a Mini Cooper S R56. This guide follows up on a previous video where I diagnosed the issue. Opting for an aftermarket pump with stellar reviews and a fraction of the OEM cost, we embark on this DIY journey. Strap in for a detailed walkthrough, and don't miss the video timestamps in the description for quick navigation through key steps.

Getting Started

Firstly, ensure the car is safely jacked up and supported on jack stands. Removing the front wheel on the right side and the wheel arch cover grants us the necessary access to the engine bay. With the wheel arch liner out, the workspace opens up significantly, revealing the water pump amidst the engine components.

Draining the Coolant

Before disconnecting any coolant-related parts, it's crucial to drain the system. Locate the drainage pipe and disconnect one end to let the coolant flow out into a container. This step minimizes mess and prepares the car for the water pump removal.

Removing the Water Pump

Contrary to some guides suggesting extensive disassembly, I aimed for a minimal approach by accessing the pump through the wheel arch. Although the manual advises removing the friction gear, I found it more efficient to work around it. Utilizing a bendable ratchet wrench from Harbor Freight, I removed three bolts from the pulley to reach the water pump. Remember to put the friction gear in service position to ease this process.

Despite some struggles and tight spaces, patience and the right tools allowed for the removal of the water pump without dismantling significant parts of the car. It's a testament to the feasibility of DIY repairs with a bit of ingenuity.

Installing the New Pump

Upon comparing the old and new pumps, it's evident that quality matters. Avoid cheap aftermarket pumps; their inferior design can lead to premature failures. The installation of the new pump requires careful maneuvering back into place, a process made easier with a better-quality pump.

Securing the pump involves aligning and tightening bolts in confined spaces. A magnetized screwdriver can assist in positioning the bolts for screwing in by hand. Although reaching the recommended torque settings might be challenging in such tight quarters, ensuring they are securely tightened is vital.

Final Steps

With the water pump in place, reattach the pulley, ensuring it's correctly oriented. Releasing the friction gear allows for easier tightening of the pulley bolts. Don't forget to reconnect the coolant hose and secure its clamps to prevent leaks.

Refilling the coolant system with a 50/50 mix of coolant and water requires attention to air removal. Start the car, allow it to warm up, and continue adding coolant as necessary. Monitoring for leaks and ensuring the system is air-free are crucial before considering the job done.

Conclusion

Replacing the coolant pump on a Mini Cooper S R56 is a manageable DIY task with the right approach and tools. This guide aims to demystify the process, proving that with patience and careful planning, anyone can tackle car repairs. Check your car's manual, gather the necessary tools, and take your time to ensure a successful replacement.

For a more detailed visual guide, watch the full video here.