When Should a Car Motor Be Replaced?
3 Answers
There is no specific time for replacing a car motor. If there is no malfunction or damage, replacement is unnecessary. However, if the car motor is damaged, it should be replaced promptly to avoid affecting the vehicle's startup. The function of the motor is to drive the starter rotor to rotate by the force exerted on the energized coil in the magnetic field. The small gear on the rotor then drives the engine flywheel to rotate, thereby turning the crankshaft and starting the car. The motor consists of an internal gear ring and a matching gear or rotor. The internal gear ring is fixed to the housing, and the oil entering from the oil port pushes the rotor to revolve around a central point. This slowly rotating rotor drives the output through a splined shaft, forming a cycloidal hydraulic motor. Each series of motors offers various displacement options to meet different speed and torque requirements.
I've been driving for over 20 years and have seen many cases of engine problems. Generally speaking, the main signals that an engine needs replacement are noticeable power loss, such as sluggish acceleration or lack of power. Another major issue is a sudden spike in fuel consumption—burning significantly more fuel for the same distance traveled. High mileage is also a red flag; engine wear accelerates after exceeding 150,000 kilometers. I recommend paying attention to changes in engine noise, like abnormal rattling or heavy roaring sounds, as these are warning signs. Regular maintenance can delay replacement, but if engine failures become frequent—such as constant stalling or difficulty starting—don't push your luck. Cost-wise, replacing an engine might run you tens of thousands, so act decisively when it's more economical than repairs. Safety comes first—breaking down mid-drive is dangerous, especially on highways or in rain/snow. It's best to get regular professional inspections and not wait until engine knocking occurs to regret it. Extending engine life relies on good habits, like timely oil changes and minimizing idling.
My old car has already run 180,000 kilometers, and the starter motor almost gave out last year. I remember it had difficulty starting, dragging on before finally igniting, with intermittent sounds. The mechanic said the internal gears were severely worn and needed a complete replacement. Looking back now, it was all due to neglecting simple maintenance like not changing the air filter or engine oil on time, leading to carbon buildup. Starter motors typically show their age after 10-15 years or high mileage. If you notice reduced power or unusually high fuel consumption, be alert—don't wait until it completely breaks down on the road. The replacement cost isn't cheap; I spent several thousand, but considering reliability and avoiding unexpected breakdowns, it was worth it. Regular inspections are key, especially listening for unusual engine noises and paying attention to dashboard warning lights. Don't cut corners by going to shady roadside repairs; only authorized service centers can prevent hidden risks.
