According to the National Center for Hydrometeorological Forecasting, due to the impact of storm No. 2, on July 23 and 24, in the Northeast, Northwest and Hanoi areas, there will be moderate rain, heavy rain and thunderstorms. There are places where the rain is very heavy. Heavy rain will cause flooding on some roads, making it difficult for vehicles to move and possibly leading to engine stalling.
Automobile experts recommend that if the road is flooded and unsafe, the driver should not move through it but should choose another route. You should avoid driving next to large vehicles or near vehicles in the opposite direction because these vehicles can create water waves, causing water to easily overflow into the engine compartment. Drivers should also turn off the air conditioner and drive in low gear.
According to Mr. Ngo Duy Ngoc - traffic rescue worker in Mai Dich area (Nam Tu Liem, Hanoi), if the car moves onto a flooded road and the engine stalls, the driver should not try to restart it because it will lead to to water damage, repair costs are very high. Therefore, if you want to drive through flooded roads, you need to be very careful, even with high-clearance vehicles.
According to automobile engineer Le Van Tach, when entering a flooded area without knowing the depth, the driver should go slowly to avoid sudden water entering the engine and causing the steering arm to be bent or broken.
According to Mr. Tach, if you drive slowly, the car will stall when the water is deep, so the driver should absolutely not start the car and call for help. If the driver intentionally restarts the engine, the air intake system will continue to operate, the pistons are pushed up very quickly by the crankshaft to continue compressing the air. However, the amount of water entering the combustion chamber will exert a huge force back. These two forces will force the boundary arm (leg arm) to deform.
"If it's mild, the arm will be bent and the cylinder wall will be scratched. In severe cases, the arm will break, leading to puncture of the cylinder wall, destroying the engine and incurring huge repair costs. Vehicles entering the area Flooded water requires you to go to the garage to check and clean the air filter, air intake, and air mixer to avoid water entering the combustion door and causing the vehicle's engine to stall," engineer Le Van Tach recommended.
Water jacking is the phenomenon of water pouring into the cylinder's combustion chamber through the air intake while the engine is running, causing the piston to be blocked and the fuel unable to burn in the combustion chamber, leading to the engine stalling.
Compared to gasoline engines, diesel engines are more susceptible to hydrostatic shock and serious damage because diesel engines have a higher compression ratio and smaller combustion chamber, so a small amount of water entering the engine can cause hydrostatic shock.
