Diesel Fuel Injection Pump T73208235 Engine Auto Engine Part

Safety hazards of fuel pump failure
The fuel pump is responsible for transporting fuel from the fuel tank to the engine. If a failure occurs (such as pump body wear, motor burnout, oil line blockage, etc.), it may cause:
1. Sudden flameout during driving, causing rear-end/collision accidents
Principle: When the fuel pump cannot supply fuel normally, the engine stops running due to fuel interruption, loses power and steering/brake assistance (some models do not have vacuum assistance).
Risk scenarios:
Sudden flameout during high-speed driving, the vehicle loses power and is easily rear-ended by the vehicle behind;
The steering power loss makes the steering wheel heavy and difficult to avoid obstacles;
The brake assistance is weakened and the braking distance is significantly extended.
Case: The fuel pump failed on the highway and the rear vehicle failed to avoid it in time, causing a chain rear-end collision of multiple vehicles.
2. Fuel leakage causes fire or explosion
Common failure points:
Aging and damage of the fuel pump seal causes fuel to leak into the high-temperature engine compartment;
Short circuit of the oil pump line (such as poor contact of the plug) generates electric sparks, igniting the leaking fuel.
Consequences: The fire may spread to the entire vehicle within a few minutes, especially in the high temperature environment in summer.
Data: According to statistics, about 15% of automobile spontaneous combustion accidents are related to fuel system leakage.
3. Abnormal wear or damage to the engine
Indirect impact:
Insufficient fuel pump pressure (such as filter blockage) leads to insufficient fuel injection, incomplete engine combustion, carbon deposits and increased wear of pistons and valves;
Low pressure may cause "cylinder loss" or "knock", and long-term operation may cause serious mechanical failures such as connecting rod breakage and cylinder damage.
Repair cost: The cost of engine overhaul can reach thousands of yuan or even higher.
4. Abnormal noise from fuel pump causes driver distraction
Performance: The oil pump motor bearing emits a "buzzing" abnormal sound after wear, which may cover other key warning sounds (such as tire abnormal noise) when driving at high speed, distracting the driver's attention.
Risk: Distracted driving leads to delayed response and increases the probability of accidents.
2. Safety hazards of oil pump failure
The oil pump is responsible for providing lubrication and cooling for various engine components. Failures (such as gear wear, oil line blockage, and failure of the pressure limiting valve) may lead to:
1. Engine "cylinder pull" and "bearing sticking", causing mechanical paralysis
Principle: When the oil pump cannot supply oil or the pressure is insufficient, the friction pairs such as the piston and cylinder wall, crankshaft and bearing lose lubrication, and high temperature and adhesion are generated instantly.
Consequences:
In mild cases, the engine needs to be overhauled (replace pistons, cylinder liners, etc.);
In severe cases, the engine is directly scrapped, and the repair cost accounts for 10%-30% of the vehicle value.
Warning signal: After the "oil pressure warning light" on the dashboard lights up, continuing to drive may cause permanent damage within 5-10 minutes.
2. Sudden drop in power, increasing road risks
Related impacts:
Turbocharged models: abnormal wear of the turbocharger bearing due to lack of oil, resulting in a sudden drop in power output;
Variable valve timing (VVT) system: the hydraulic mechanism loses pressure, the valve timing is disordered, and the engine power drops significantly.
Risk scenario: Power interruption during overtaking or climbing, which may cause collision or sliding.
3. High temperature causes chain failure
Cooling failure: The engine oil also has a cooling function. Lack of oil will cause the engine temperature to rise sharply, which may cause:
Coolant boiling, water tank bursting;
Cylinder head/cylinder body deformation, causing permanent mechanical damage;
Line rubber parts aging accelerated, increasing short circuit risk.

Superposition risks in special scenarios
1. Fault amplification effect in extreme weather
High temperature environment: The fuel pump is more likely to overheat and burn due to poor heat dissipation, and the leaked fuel evaporates to form a combustible mixture, which will explode when encountering sparks;
Low temperature environment: The oil pump runs at high load due to the viscosity of the oil, which may cause gear breakage or motor overload, and stop directly.
2. Special risks of new energy fuel vehicles
Hybrid models: Some hybrid system fuel pumps serve both the engine and motor cooling systems, and failures may cause the dual power system to fail;
High-pressure fuel pump (direct injection model): Failures may cause the fuel high-pressure pipeline to burst, and the sprayed atomized fuel is more likely to burn when encountering high temperatures.
IV. Prevention and countermeasures
1. Regular maintenance and monitoring
Check the fuel pump filter every 50,000 kilometers (external pumps can be cleaned/replaced, and internal pumps need to be replaced as an assembly);
Check the oil pump pressure during each maintenance (normal idle pressure is about 1.5-3.5bar, refer to the vehicle manual for details);
Pay attention to abnormal symptoms: such as weak acceleration, abnormal engine noise, abnormal fluctuations in the oil gauge, etc.
2. Emergency handling principles
If the engine suddenly stalls while driving:
① Immediately turn on the double flash and try to restart in neutral (some models still have a short power supply after stalling);
② If it cannot be started, step on the brakes and use the remaining inertia to move the car to the emergency lane, away from the traffic;
③ It is strictly forbidden to push the car in the middle of the road to avoid being rear-ended.
If you smell gasoline or find oil leakage:
Stop the car and turn off the engine immediately, stay away from the vehicle and call the fire department. Do not start the engine or use open flames for lighting.