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Type :
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Engine starter
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Specification :
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12V 2.0KW
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Number of feet :
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9T
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Brand :
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nuojin
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Number :
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233001CA0A 23300-1CA0C
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Quality :
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Regeneration
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Delivery time :
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10DAY
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The core principle for installing the 12V 2.0KW starter of Infiniti models is to follow the reverse process of removing the old starter. The position of the starter varies slightly across different models (e.g., it is located above the subframe for the Q50L, and on the right side of the engine compartment near the transmission for the FX series). The specific general installation steps are as follows. Before operation, it is recommended to prepare tools such as wrenches, sockets, and torque wrenches, and take proper safety precautions:
First, confirm that the model of the new starter is compatible, check that there are no cracks on its exterior and all components are complete. Meanwhile, clean the oil stains, rust, and dust on the starter mounting surface on the engine side to prevent impurities from affecting the fitting degree during installation. Then, disconnect the negative cable of the battery to avoid short circuits in the circuit during installation.
Place the new starter accurately at the installation position and align it with the mounting holes on the engine side. The starters of most Infiniti models are usually fixed with 2-3 fixing bolts. First, manually screw in the bolts for preliminary fixing to prevent thread damage caused by bolt skewing.
Use a torque wrench to tighten the bolts according to the torque specified in the vehicle maintenance manual. Referring to the standards of similar models, the general tightening torque can be controlled at approximately 45±5N·m. Do not apply excessive force to avoid damaging the starter housing or the threads of the engine mounting seat.
First, connect the B+ terminal power cable of the starter. When tightening the fixing nut, control the torque at 12±2N·m to prevent terminal breakage due to excessive torque. Then, plug in the S terminal control circuit connector and ensure the connector is fully clamped. At the same time, organize the routing of the wire harness to avoid interference between the wire harness and moving parts such as the transmission counterweight. You can properly fix the wire harness with tape to prevent it from shaking.
Reconnect and fasten the negative terminal of the battery. Then, enter the vehicle and turn the ignition switch to test the working status of the starter. Observe whether the starter can operate smoothly and whether the engine starts normally. If there are abnormal noises, weak starting, or failure to start, immediately cut off the power and check whether the bolts are tightened properly and the circuit connections are correct.
In addition to following the standardized procedures for installing the 12V 2.0KW starter of Infiniti models, extra attention must be paid to safe operation, component compatibility, detail control, and post-installation testing to avoid damaging parts or causing malfunctions. The specific precautions are as follows:
Before operation, ensure the ignition switch is turned off and the key is removed, then disconnect the negative terminal of the battery. Connecting the circuit in advance may easily cause problems such as short circuits and accidental starting, which can damage the operator and the vehicle’s electrical system. Reconnect the negative terminal only after the installation is completed, and reconfirm that the ignition switch is in the off state before reconnecting.
Wear work gloves and goggles to prevent hands from being scratched by oil stains or sharp edges, and to avoid foreign objects splashing into the eyes. The operating environment must be kept clean and dry to prevent dust and moisture from entering the interior of the starter, which could cause short circuits or part rust. Additionally, you can lay down a fender cover set (three-piece) to avoid scratching the vehicle’s paint during operation.
Before installation, not only verify that the starter model matches the corresponding Infiniti model, but also check that the new starter has no cracks or deformation on its exterior, all internal parts are complete, and that key components such as the drive gear and brushes are in normal condition. In addition, pay attention to the gap between the end face of the drive gear and the end face of the flywheel ring gear—it should be maintained at 2.5–5mm. If the gap is inconsistent, adjust it by adding or removing gaskets to avoid abnormal meshing.
Use the cross-tightening method when tightening the installation bolts to prevent the starter from being installed crookedly. A torque wrench must be used to operate according to the specified torque—do not tighten too loosely (as this will cause vibration during operation) or too tightly (as this will damage the threads or the starter housing). Similarly, control the force when tightening the nuts of the circuit terminals to prevent terminal breakage.
It is recommended to first connect the B+ terminal power cable of the starter and tighten the nut, then plug in the S terminal control circuit connector, ensuring the connector is fully clamped. Do not reverse the order, and do not allow the circuit to come into contact with moving parts such as the transmission—this prevents wire harness wear and short circuits during operation.
Before connection, clean the oxide layer and oil stains on the terminal blocks to ensure good contact. When organizing the wire harness, properly fix it with tape to prevent terminal loosening caused by wire harness vibration during vehicle driving. At the same time, strictly prohibit pulling the circuit to prevent the internal copper core from breaking.
After restoring power supply, first turn the ignition switch gently to listen for any abnormal noise during the starter’s operation, then attempt to start the engine normally and observe whether the start is smooth. If problems such as weak starting or gear abnormal noise occur, immediately cut off the power supply for inspection, and check whether the bolts are loose and whether the gear meshing is normal. In addition, the duration of each start should not exceed 5 seconds, and the interval between two starts should be more than 15 seconds to avoid starter damage due to overload.
If problems such as misaligned installation holes or mismatched circuit interfaces are found during installation, do not operate forcefully. You can refer to the maintenance manual of the corresponding model or consult professional maintenance personnel directly. Do not tap the starter with tools such as hammers or wrenches, as this may damage the internal coils and gear structure.
References：
The precautions for installing the 12V 2.0KW starter of Infiniti models you viewed earlier do not come from a single specific official Infiniti maintenance manual or a sole authoritative document. Instead, they are comprehensive content compiled by integrating general standards in the automotive maintenance field, common key points for starter installation across multiple vehicle models, and relevant maintenance experience from professional automotive platforms such as Autohome and PCauto. The specific reference bases are as follows:
Essential precautions universally applicable to the disassembly and assembly of all automotive starters include: disconnecting the negative terminal of the battery to prevent short circuits before operation, testing the starting status after installation, and prohibiting tapping the starter. For example, multiple Q&A articles related to starter replacement on Autohome emphasize these basic standards.
Details such as laying down a three-piece fender cover to prevent paint scratches, tightening bolts according to the specified torque, limiting each startup duration to no more than 5 seconds, and keeping an interval of over 15 seconds between two starts are highly consistent with the starter disassembly and assembly precautions published on platforms like PCauto and Autohome. This content is a compilation of numerous maintenance cases and practical operation experiences.
Content mentioned in the previous guidelines, such as the positional relationship between the starter and the engine/transmission, and the sequence of circuit connections, are adaptive key points supplemented based on general standards, combined with the characteristic that luxury brand models (like Infiniti) have relatively sophisticated electrical circuits. These details align with the higher requirements for circuit and component protection during the maintenance of Infiniti models.
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