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What is the solution for crankshaft seizure?

1 Answers
LondynFitz
07/30/25 7:53am
Engine crankshaft seizure repair method: 1. Disassemble the engine: Separate the crankshaft and bearing shells, remove connecting rods and pistons, disassemble piston pins, remove cylinder head assembly, and extract camshaft. 2. Inspection: Check crankshaft damage and out-of-roundness, measure cylinder bore and piston ovality, examine camshaft and bearing shell roundness. If out-of-roundness exceeds standards, machining repair or part replacement is required. 3. Final processing: Assemble the engine according to overhaul standards. After completion, measure cylinder compression, then conduct engine bench testing. After successful testing, reinstall in the vehicle.
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Why does the motorcycle lack power and fail to accelerate when throttling?

The reasons why a motorcycle lacks power and fails to accelerate when throttling are as follows: 1. Insufficient fuel: A lean air-fuel mixture causes insufficient piston thrust after ignition, prolongs combustion time, and leads to engine overheating. The symptom of a lean mixture is poor acceleration during operation; acceleration improves when manually adjusting the choke or pumping fuel, but power loss returns when not enriching the mixture, indicating the motorcycle is running lean. 2. Excessive fuel: A rich air-fuel mixture causes poor acceleration at low speeds. A rich mixture lacks sufficient oxygen during combustion, leading to incomplete combustion, reduced power, decreased fuel efficiency, and excessive carbon buildup that clogs the exhaust system, worsening the power loss. 3. Clogged air filter, excessively high carburetor float level: Fuel overflow in the carburetor float chamber; loose main jet in the carburetor; malfunctioning enrichment system in the carburetor; clogged main air jet in the carburetor. 4. Poor fuel quality or incorrect gasoline octane rating: Can cause knocking; expired gasoline may decompose and lose calorific value; water in the fuel leads to intermittent engine operation and backfiring; presence of other impurities in gasoline.
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How Many Days After Car Tinting in Summer Can You Roll Down the Windows?

If it's summer, you can roll down the windows after 3 days. Below are some common techniques for car tint film baking: Dry-Wet Combination Shaping Method: The dry-wet combination shaping method is used when the conformity between the film and the curvature of the glass cannot be confirmed after dry baking. After dry baking, lift the film, evenly spray installation fluid on the glass, then lay the film back down and use a plastic squeegee to remove the water. For any remaining bubbles, use the wet baking method to smooth them out. Stretching Shaping Method: First, clean the glass with a squeegee, then use a heat gun to dry any remaining moisture on the glass surface. Use a wet paper towel to draw a wet line approximately 3 cm wide in the middle of the glass (to secure the film). Place the roughly cut film on the glass surface, leaving 5-8 cm extra at the top and bottom. Make small cuts in areas with bubbles along the top and bottom edges of the film. While baking the film, lift it by hand at an angle of about 15 degrees to the glass, pull it downward firmly, and rotate the heat gun evenly from top to bottom while visually observing the degree of film shrinkage.
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How to Start Without Stalling?

If you don't press the accelerator slightly when starting on an uphill slope, the engine may stall due to insufficient idle speed to move the vehicle. Slowly release the clutch pedal until the vehicle starts to vibrate, then hold it at this position without further lifting to prevent stalling. When starting, quickly release the clutch until the vehicle reaches the semi-engaged state, then hold the clutch steady and rapidly release the brake with your right foot.
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What are the main impacts of foggy weather on safe driving?

The main impact of foggy weather on safe driving is reduced visibility and unclear sight. In light fog areas, it is necessary to appropriately reduce driving speed and increase the distance between vehicles. The following are specific requirements for driving in foggy conditions: When visibility is between 200 meters and 500 meters: You must turn on the anti-glare low beam, width marker lights, and tail lights, with speed not exceeding 80 km/h, and maintain a distance of more than 150 meters between vehicles. When visibility is between 100 meters and 200 meters: You must turn on the fog lights, anti-glare low beam, width marker lights, and tail lights, with speed not exceeding 60 km/h, and maintain a distance of more than 100 meters between vehicles. When visibility is between 50 meters and 100 meters: In addition to turning on the above lights, speed should not exceed 40 km/h, and maintain a distance of more than 50 meters between vehicles. When visibility is below 50 meters, it is considered extremely dense fog, and public security authorities may implement traffic management measures such as partial or full closure of highways according to regulations.
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Do I need to replace tires at 50,000 kilometers?

Tires at 50,000 kilometers may not need immediate replacement. The process and precautions for tire replacement are as follows: Tire replacement process: Loosen the screws; lift the vehicle with a jack; remove the screws securing the wheel (counterclockwise to loosen, clockwise to tighten); take off the old tire; install the new wheel. Precautions for tire replacement: Choose tires of the same specifications; pay attention to installation direction and inflation; check tire pressure; perform wheel alignment after replacement; when removing the tire, slightly loosen the fixing screws before partially lifting the vehicle with a jack; select tires with guaranteed quality.
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What is the 'A' in a circle on the car?

It is the STT Intelligent Fuel-saving System, which is a system that controls the engine start and stop. Below is relevant information about the STT Intelligent Fuel-saving System: 1. Introduction to the STT Intelligent Fuel-saving System: STT is short for STOP&START. The STT Intelligent Fuel-saving System is a system that controls the engine start and stop. The system uses a computer to determine the vehicle's status, such as when the vehicle is in a stopped state due to a red light or traffic jam. The computer can control the engine to automatically stop running, and during the stop phase, it does not affect the use of in-car devices like the air conditioner or audio system. 2. Function of the STT Intelligent Fuel-saving System: By implanting an enhanced motor with idle start-stop functionality into a traditional engine, the system ensures that the engine completely shuts off when the vehicle meets the idle stop conditions. When the vehicle needs to start moving again, the idle start-stop motor system quickly responds to the driver's start command, rapidly starting the engine for seamless transition, thereby significantly reducing fuel consumption and exhaust emissions.
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