Starter 428000-6770 4280006770 DSN1364 AH4211001BB for Range Rover 5.0

Pre-Installation Preparation

1. Tools and AccessoriesPrepare calibrated tools: a torque wrench, box-end wrenches, Torx bolt sockets, extension bars, angle adapters, as well as compatible fixing bolts and new seals. Verify that the 12V 1.4KW starter matches the vehicle’s VIN. Inspect the starter for external damage and ensure terminals are free of oxidation; if oxidation is present, gently polish it off with fine sandpaper.
2. Safety PreprocessingPark the vehicle on a flat surface and secure the wheels with wheel chocks. Turn off the engine and wait for it to cool completely. Disconnect the negative battery cable to prevent accidental power-on during installation, which could cause short circuits or component damage. This is critical because the Range Rover’s starter installation area has dense wiring with closely spaced positive and negative terminals, posing a high risk of electric shock.
3. Cleaning and InspectionRemove debris around the heat shield at the starter mounting location (below the exhaust manifold on the passenger side of the engine). The heat shield is secured by spring clips and can be easily removed. Wipe the mating surfaces of the flywheel housing and starter with a clean rag, and clear oil, dirt, and debris from the locating pins and holes to ensure a tight fit during installation.

Core Installation Operations

1. Position and Pre-Fix the StarterAlign the starter with the flywheel housing mounting holes, ensuring the terminal end of the housing faces the front of the vehicle. Manually thread the Torx fixing bolts to pre-fix the starter and prevent misalignment. Pay close attention to the starter’s orientation to avoid subsequent wiring connection issues.
2. Standardize Bolt TighteningTighten the starter’s Torx fixing bolts to 47N·m using a torque wrench. Use an extension bar to adjust the operating angle if needed—especially for the bottom bolt, which must be installed clear of the front axle to ensure sufficient working space. This prevents uneven stress and potential housing deformation.
3. Connect Wires in SequenceFirst, connect the ignition relay wire. The connector has limited installation space, so this step must be completed before tightening the main power cable. Ensure the connector is fully seated and secure. Next, attach the main power cable and tighten the terminal nut to 15N·m. Finally, fasten the ground braided wire to the hex bolt on the upper part of the starter. Secure all wire clips firmly to prevent loosening or vibration.
4. Reinstall Surrounding ComponentsReattach the heat shield using the original spring clips to cover the starter and solenoid switch, protecting them from damage by high-temperature components. Secure the positive cable clamp to the intake manifold and organize the surrounding wiring to avoid contact with moving engine parts or high-temperature areas.

Post-Installation Testing and Finalization

1. Restore Power and TestReconnect the negative battery cable. Start the vehicle for a no-load test: observe that the starter operates smoothly without abnormal noises such as gear jamming or metal friction. Conduct an on-vehicle start test to verify the starter can reliably crank the engine without weakness or hesitation.
2. Detailed Re-InspectionAfter starting, let the engine idle for 3 minutes. Check that the starter terminals show no abnormal overheating and all wire connections are secure. Confirm the heat shield is firmly installed without resonant noise, and all fixing bolts are tight. The installation process is now complete.

Safe Operation Guidelines

1. Strictly Comply with Power-Off and Anti-Scald StandardsLive operations are prohibited throughout the entire process. After disconnecting the negative battery cable before installation, it is recommended to wrap the terminal with insulating tape to prevent accidental contact and short circuits. Additionally, the engine must be allowed to cool completely before commencing work— the starter’s mounting location is close to the exhaust manifold, where high-temperature components pose a significant scald risk. This also prevents high temperatures from damaging precision parts such as the starter’s internal coils.
2. Avoid Component and Operational RisksThe starter is a precision electromagnetic component; violent knocking, prying, or rough handling during transportation and installation is strictly forbidden, as this may cause displacement of the internal armature or gear set. When removing or installing the starter, avoid surrounding components such as the front axle and intake manifold to prevent collisions that could deform the starter housing or damage other parts. A protective mat can be laid at the corresponding position in the engine compartment during operation to protect both the vehicle body and the components from tool drops.

Part Compatibility and Mounting Surface Adaptation

1. Ensure Precise Part MatchingVerify that the 12V 1.4KW starter is fully compatible with the vehicle’s VIN. Priority should be given to original equipment manufacturer (OEM) parts to avoid issues such as weak cranking or malfunction indicator light activation due to compatibility problems. Auxiliary parts such as fixing bolts and seals must meet the required specifications— mixing short bolts or low-strength bolts is prohibited. Seals should be replaced with new, compatible ones; substitution with other parts is not allowed.
2. Guarantee Clean and Secure Mounting SurfacesBefore installation, not only clean the mating surfaces of the flywheel housing and the starter but also focus on removing oil, rust, and debris from the locating pins and holes. If there is an oxide layer on the terminals, gently polish it off with fine sandpaper and wipe away metal debris to prevent it from entering the starter and causing gear jamming. Ensure the mounting surfaces are flat to achieve a tight fit between the starter and flywheel housing, reducing vibration during operation.

References：

1. General Maintenance Specifications for Starter Installation in the Automotive Industry

2. Derived from Practical Maintenance Experience of Land Rover Range Rover Models

• The starter’s mounting location (below the exhaust manifold on the passenger side of the engine);

• Torque parameters such as 47N·m for fixing bolts and 15N·m for the main power terminal nut;

• Special requirements for reinstalling the heat shield around the exhaust manifold.