Commonly Replaced Parts In any conventional motor vehicle, whatever the make or model, certain parts that need to be replaced on a regular basis exist. These are the items most exposed to stress, torque, constant motion, force, friction and heat.
With all the intricate moving parts of the conventional reciprocating internal combustion engine, the need for special heat resistant or heat tolerant lubricating fluids and compounds is evident. Engine oils serve to lubricate the pistons and crankshaft, and need to be replaced every 3 months or 10,000 kilometers whichever comes first. Other special lubricating fluids, such as transmission fluid and differential oil, gear oil and steering fluid, serve the same purpose; that is to lubricate, thereby reducing heat and stress causing friction, and ensure that all the gears and parts they bathe move smoothly. These need to be checked every once in a while and replaced or topped off as the need arises.
In places where the use of fluids is physically not feasible, greases and similar lubricating compounds take up the job. These are viscous compounds that function similar to their fluid counterparts but forego the need for any container. They are most commonly used in the steering column, steering mechanisms and suspension system, not to mention door, bonnet and boot hinges. A periodic check up of these places is recommended and re-greasing done whenever necessary.

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