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Billet Aluminium Alternator Pulley I R52/R53 Cooper S/JCW/GP
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£45.00
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£45.00
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The G54 Standard Size Alternator Pulley is designed for MINI R52 and R53 Cooper S and JCW owners who want to retain the original alternator drive ratio while replacing or visually upgrading the factory pulley. Maintaining the standard diameter preserves the intended alternator speed relationship, making this version suitable for standard engines and modified cars where no alternator speed reduction is required.
Alternator speed correction using a larger pulley diameter is advised and applicable once a reduced size supercharger pulley is installed.
Machined from 6082 grade aluminium billet, the pulley is produced with close control of the belt grooves, bore and mounting faces. Correct concentricity is important for belt stability and bearing life, particularly in the compact R53 accessory drive where several components share the same belt path. The billet construction gives the pulley a clean, precise appearance and avoids the rough finish often associated with basic pressed components.
An anodised surface helps protect the aluminium from corrosion and contamination and is available in a selection of colours. The result is a functional replacement that respects the original drive ratio while adding the visual quality expected from a considered G54 engine bay package.
Design features and customer benefits
- Standard diameter maintains the original alternator drive ratio.
- 6082 billet aluminium construction.
- CNC machined grooves, bore and mounting faces.
- Designed for accurate belt tracking and concentric operation.
- Ideal for restoration, maintenance and coordinated engine bay builds.
- Anodised in a choice of corrosion resistant colours.
Product Fits
Product Fits
Make |
Model |
|---|---|
|
MINI |
Cooper S |
|
JCW |
MINI |
|
MINI |
GP |
Technical Details
Technical Details
Parameter |
Info |
|---|---|
|
MINI |
Cooper S |
|
JCW |
MINI |
|
MINI |
GP |
Materials
Materials
Made from high quality 6082 aluminium that is anodised is a range of colours for excellent corrosion resistance. The pulleys uses a a high quality bearing for smooth running and longevity
Care Instructions
Care Instructions
Application: MINI R52 and R53 alternator drive
Recommended equipment: Vehicle lift or safe front access, belt routing reference, suitable sockets, torque wrench, belt tensioner tool, pulley holding or extraction tools as required, and eye protection. An alternator pulley counterhold tool may be required.
Safety first: Work only on a cool, stable vehicle supported by approved lifting equipment. These instructions are an overview; the current OEM workshop procedure and torque data take priority.
Procedure
1. Confirm the alternator type, shaft interface and pulley specification. For the five percent oversize version, verify belt compatibility and the intended charging characteristics before installation.
2. Disconnect the battery negative terminal and wait for the vehicle electrical system to shut down before working near the alternator.
3. Remove the required intake and access components, note the belt routing and release the auxiliary belt with the correct tensioner tool.
4. Inspect the belt, tensioner, idler pulleys, crank damper and alternator bearings. Correct any noise, play or misalignment before fitting the new pulley.
5. Use the appropriate alternator pulley holding and counterhold tools to remove the original pulley. Do not load the alternator shaft or cooling fan with improvised tools.
6. Compare the G54 pulley with the original, checking bore, offset, belt grooves and fastener engagement. Clean the shaft and fit the pulley squarely.
7. Tighten the pulley fastener to the current alternator or vehicle manufacturer specification using the correct holding method.
8. Refit the belt and confirm that all ribs are seated. Rotate the system by hand where permitted and verify clearance before reconnecting the battery.
9. Start the engine and observe belt tracking. Measure charging voltage at idle and with major electrical loads operating.
10. Confirm that charging performance and belt behaviour match the original standard diameter arrangement.
11. Refit all access components and complete a final inspection after a short road test.
Warranty Details
Warranty Details
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Billet Aluminium Alternator Pulley I R52/R53 Cooper S/JCW/GP
£45.00
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