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Considering timing chains are generally much stronger and last much longer than timing belts, is there a reason, other than cost, why manufacturers aren't using serpentine chains as opposed to belts? Maybe I just haven't put enough thought into this, as it literally just popped in my head... Noise, maybe? If not, then what?
Some belts are such a pain to replace, even for seasoned mechanics, that to have a lifetime chain on there would seem to make a lot of sense...
Cost and Noise. Because the serpentine belt is so easy to get to and replace it just makes sense to have something that is less costly and less noisy. You would also have to install cogs on all of the accessories. Having something freeze up would be a lot more catastrophic as well as there would be no slip on a chain.
Cost and Noise. Because the serpentine belt is so easy to get to and replace it just makes sense to have something that is less costly and less noisy. You would also have to install cogs on all of the accessories. Having something freeze up would be a lot more catastrophic as well as there would be no slip on a chain.
Some vehicles practically require partial engine disassembly and/or engine mount removal to replace the belts... Hardly what I'd call easy.
I can understand the potential catastrophe that would ensue from a frozen pulley, but I HAVE seen some pretty disastrous situations involving frozen A/C compressors and belts...
Not a good idea if your smog pump or alternator locks up. I've had both do it on cars before. Lots more damage than a busted belt if the chain breaks, to wiring, plastic parts, the hood, radiator, etc. Neat idea, but not worth it when a serpentine belt can last 100K and can be replaced for $20 or so.
Considering timing chains are generally much stronger and last much longer than timing belts, is there a reason, other than cost, why manufacturers aren't using serpentine chains as opposed to belts? Maybe I just haven't put enough thought into this, as it literally just popped in my head... Noise, maybe? If not, then what?
Some belts are such a pain to replace, even for seasoned mechanics, that to have a lifetime chain on there would seem to make a lot of sense...
I recently read that timing belts were in fact stronger than chains and they don't stretch.
Years ago we had multiple belts on autos and today many cars only have one belt. I remember changing belts yearly back in the 60-70's but I never changed a belt on my PSD even with over 100,000 miles. I bought a spare belt just in case and it was behind the seat when I sold the truck 17 years later.
Chains need lubrication. So a maintenance free belt could be replaced with an assembly that needs to be protected from the elements - and lubricated. The tradeoff is awful.
Serpentine belts last a long time these days. They are cheap, they are quiet, and easy to service (most of the time).
Cost and Noise. Because the serpentine belt is so easy to get to and replace it just makes sense to have something that is less costly and less noisy. You would also have to install cogs on all of the accessories. Having something freeze up would be a lot more catastrophic as well as there would be no slip on a chain.
the other thing would be the weight of the chain compared to a belt of similar length. now imagine that engine running at 70mph, and the belt or chain breaks. with a belt little damage is done, and is easily replaced. with a chain, shrapnel goes everywhere, not to mention the weight of the chain whipping around under hood.
I am going to assume that you are talking about timing belts vs timing chains.
Many engines run timing chains. They are not a accurate as belts they stretch and wear over time and need replacement as well. The belt is cheaper more accurate and in many cases stronger.
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