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Type :
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starter
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Specification :
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12V 3.5KW
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Number of feet :
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11T
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Brand :
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nuojin
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Number :
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123708134 0001314011
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Quality :
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Remanufacture
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Delivery time :
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10 day
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The installation logic of 12V starter motors is similar across different Lamborghini models. Among them, popular models represented by the Aventador LP700 are the most typical. Due to the compact layout of the engine compartment, the starter installation requires following a rigorous process. The specific method, combined with the characteristics of supercar maintenance, is as follows:
Prepare a torque wrench, 10-19mm socket set, insulating gloves, a jack with stands, undercarriage shield removal tools. Meanwhile, prepare a compatible brand-new original 12V starter motor (e.g., model 7M911024A for LP700), original mounting bolts, terminal protection sleeves, insulating tape, and special coolant.
Park the vehicle on a level surface, apply the handbrake, and secure the wheels with wheel chocks.
Open the front trunk to remove the luggage compartment, disconnect the vehicle's main battery cable, and wait 5-10 minutes to discharge residual electricity.
Lift the vehicle with a jack and firmly support it with stands. Remove the undercarriage lower shield and bottom plate fixing crossbar.
If the starter motor is blocked by coolant hoses, disconnect the hoses, drain the coolant, and mark the pipelines to prevent misinstallation.
Find the starter motor mounting position at the rear of the engine. Clean oil stains and rust from the mounting seat surface.
Align the new starter motor with the mounting holes, manually screw in 2-3 mounting bolts (do not fully tighten), and gently rotate the flywheel for auxiliary calibration to ensure precise alignment between the starter gear and the ring gear of the flexplate.
Gradually tighten the mounting bolts in a diagonal sequence using a torque wrench, with the torque controlled at approximately 37N・m. Avoid over-tightening (which may cause cracking of the mounting seat) or under-tightening (which may lead to vibration).
If the starter motor is equipped with a heat shield, install it on the side close to the exhaust manifold and catalytic converter for heat insulation.
First, connect the high-power cable of the starter motor to the copper terminal block, then connect the relay power supply feeder on the solenoid valve.
When fixing the nut of terminal 30, control the torque at 9.8N・m. After completing the wiring, install the protection sleeve and reinforce it with electrical tape.
Subsequently, install the wiring harness bracket with bolts (torque: 8.4N・m) and secure 2 wiring harness clips.
Reinstall the engine bracket and motor mounts in the reverse order of disassembly. Replace the original water hoses with new seals before reinstalling them in place.
Finally, fill the cooling system with original special coolant to avoid coolant leakage.
Reconnect the vehicle's main battery cable and close the terminal cover. Start the vehicle to allow the coolant to complete circulation, then lift the vehicle again to check for coolant leakage from the undercarriage.
Turn the ignition switch multiple times to test the starting performance. Observe whether the starter motor operates smoothly without abnormal noise, and ensure the starter motor disengages immediately after the engine starts.
Use a diagnostic computer to clear fault codes, increase the vehicle speed to bring the engine to operating temperature, and recheck the starter motor wiring for overheating or looseness. After confirming no abnormalities, reinstall the undercarriage shield.
In light of the precision mechanical characteristics, compact engine layout, and high-voltage electrical system requirements of Lamborghini supercars, besides the core installation procedures, the following safety and practical precautions must be prioritized during the installation of the 12V starter motor to prevent component damage or the escalation of faults:
Genuine Compatibility for Core Components
The starter motor must be a genuine model tailored to the specific vehicle (e.g., model 7M911024A for the Aventador LP700). Its gear module, output power, and mounting holes are all matched to the operating conditions of the supercar’s high-performance engine. The use of starter motors designed for regular vehicles or non-genuine parts is strictly prohibited. Non-genuine parts are prone to causing abnormal gear meshing clearance and mismatched circuit loads, which can lead to severe malfunctions such as ring gear wear and solenoid valve burnout.
Attention to Small Spare Parts
Genuine-spec parts must be used for mounting bolts, water pipe seals, wiring harness clips, and other small components. The vibration intensity of a Lamborghini engine during operation is far greater than that of regular vehicles. Non-genuine bolts may break due to insufficient material strength, and aged or ill-fitting seals can directly result in coolant leakage.
Compliance with Tool Precision Standards
A high-precision torque wrench (with an error margin of ≤ ±3%) must be used, and the specified torque standards must be strictly followed (37N・m for mounting bolts, 9.8N・m for the nut of terminal 30, and 8.4N・m for the wiring harness bracket). It is forbidden to tighten components by feel with ordinary wrenches, as over-tightening may cause cracking of the mounting seat and deformation of terminals, while under-tightening can lead to loosening due to vibration.
Pipeline Marking and Coolant Handling
Before disconnecting the coolant hoses, mark the position of each pipeline interface with special labels. The engine compartment of a Lamborghini is packed with intricate pipelines, and incorrect reinstallation can cause failures in the cooling system circulation. When draining the coolant, collect it in a dedicated container to avoid environmental pollution. Meanwhile, check the condition of the coolant—if it is turbid or contains rust, it must be replaced immediately.
Component Placement and Inspection
Removed parts such as the engine bracket, motor mounts, and undercarriage shield should be sorted and placed in the order of disassembly and reinstalled in reverse order. Before installing the motor mounts, inspect them for aging and cracks. If any damage is found, replace them promptly; otherwise, engine vibrations will be directly transmitted to the starter motor, shortening its service life.
Wiring Harness Protection and Layout
When reinstalling the wiring harness, fix it along the preset path of the original factory and secure it with special clips. Ensure the wiring harness is kept at a distance of no less than 5 centimeters from high-temperature components such as the exhaust manifold and catalytic converter, and that it does not come into contact with moving parts like belts and gears. This prevents the insulation layer of the wiring harness from melting or wearing, which could cause short circuits.
References：
The precautions regarding the installation of the 12V starter motor for Lamborghini you inquired about are not derived from a single exclusive official Lamborghini service manual or authoritative document. Instead, they are compiled by integrating various practical information, including supercar maintenance cases and general automotive starter installation specifications. The specific information sources can be categorized as follows:
Details such as removing the undercarriage shield and coolant hoses with proper pipeline marking, re-lifting the vehicle to check for leaks after installation, and clearing fault codes with a diagnostic computer are highly consistent with the practical starter motor replacement processes for the Lamborghini LP700 published by supercar repair shops on platforms like Douyin. These details are summarized from frontline maintenance experience.
Specific parameters such as the 37N・m torque for tightening the starter assembly, 9.8N・m for terminal 30 nuts, and 8.4N・m for wiring harness brackets, as well as requirements like prohibiting brute force striking of components and reinforcing insulation protection after wiring, are fully consistent with the general automotive starter assembly/disassembly specifications published on platforms such as PCauto and Autohome. These are universal technical standards in the automotive maintenance field.
Key points emphasized in the content, such as the mandatory use of genuine starter motors and supporting small parts, and the requirement for wiring harnesses to be kept away from high-temperature components like exhaust manifolds, are targeted adjustments to general maintenance specifications based on the Lamborghini supercar’s characteristics—including high engine vibration intensity and compact engine compartment layout. These adjustments also represent universal protection guidelines for precision machinery and high-voltage electrical systems in the supercar maintenance industry.
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