Why do engines in car use belts and not chains?

Why do engines in car use belts and not chains?

Would an engine be stronger or higher if it used a sequence as a substitute of a serpentine or fan belt?  Some engines use timing chains as a substitute of timing belts, and chains are stronger – a timing chain should not must be changed for the lifetime of the engine, Rent a Car Dubai whereas a timing belt undoubtedly wants changing and this may be pricey.

No engines use chains to drive the alternator or AC pump.  Why not?  You’d suppose it might be much less upkeep however it’s not that straightforward.  Listed below are the explanation why chains aren’t used all over the place in engines, and why the artificial rubber drive belt is king.


Chains rattle: It is that straightforward – even a wonderfully tensioned chain is noisier than a belt.  Including extra chians to an engine would add engine noise.


A typical serpentine belt prices round $15.  Whereas the most cost effective timing chains are round $22.  That is not an enormous distinction, however there’s additionally additional price in utilizing sprockets as a substitute of pulleys, and maintaining a sequence lubricated.


Chains must be lubricated and belts don’t.  This provides complexity – each in getting the oil onto the chain, and maintaining that oil from spraying everywhere in the remainder of the engine bay or, even worse, the street.

Pulleys are extra dependable

The pulleys which are used to drive equipment like the ability steering pump or alternator would must be changed with sprockets.  And pulleys take care of particles within the engine bay a lot better than sprockets.  Sprockets also can put on, whereas pulleys have a tendency to not.

Chains are usually not versatile

With in the present day’s tremendous compact engines, belts snake their means round tight areas and make sharp turns.  Not solely is a sequence deeper than a belt, however it may possibly’t make the type of tight flip wanted to wrap round all of the engine parts.

Conserving the strain

Tensioning a sequence is more durable than a belt.  A typical belt is tensioned with a spring – being mild that is simple sufficient.  However a sequence requires a better quantity of adjustment in the way in which it’s tensioned – it tends to increase because it heats up.  Chain tensioners are often hydraulic – working off the engine oil.


Chains weigh extra.  This is not an issue when an engine is up to the mark – the chains momentum will carry it round.  However when altering engine speeds, this inertia will result in a much less responsive engine.

So why are chains used?

Chains are used the place a lot of pressure must be transmitted reliably.  A series could be very, very robust and that is why they’re used to hold massive forces from an engine – for instance in a bike.  So there is a lengthy life forward for chains…simply not within the engine bay.