Belt came off

The belt in my car came off.
Experienced mechanics share their insights in answering this question :
The most common cause of the belt coming off is the belt tensioner or idle pulley. They should be inspected before a new belt is installed. I recommend you seek a mechanic like the certified ones from YourMechanic to come and test your vehicle for you and repair or replace the components as necessary.

How to Identify and Fix Common car Problems ?

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The most likely cause of the belt falling off would be a damaged pulley. It`s possible that one of the police has been seized up due to lubrication in the bearing drying out. It`s also possible that one of the pulleys has a chip on the edge of it that is causing the belt to slide off.
If your serpentine belt keeps coming off, it`s likely due to one of three issues: the tensioner is loose, the pulleys are misaligned, or the belt is worn out. If the tensioner is loose, you`ll need to tighten it. If the pulleys are misaligned, you`ll need to realign them.
If the tensioner or pulleys are worn or damaged, they could cause a loose serpentine belt that might just fall off instead of breaking. Poor serpentine belt tension can affect the engine accessories, and the power steering pump or alternator won`t function properly.
When the belt comes off, this indicates there is a problem in the drive belt system. The most common issues are a faulty belt, loose tensioner, seized idler pulley, or a stuck accessory. Without the drive belt the alternator will not charge the battery which in some cases can cause the battery to go dead.
This can lead to a sudden lost of power assist for the steering system, leading to the steering wheel all-of-a-sudden becoming very hard to turn. A broken serpentine belt may stop the water pump from circulating coolant through the cooling system, causing the engine can overheat.
Sometimes the belt falls off (rather than breaking) because the pulleys and tensioner are worn, damaged, or misaligned. In that case, simply replacing the belt will not fix the problem.
Only for a very short amount of time. Without the belt, neither the alternator nor the water pump will be driven. That means that the car battery will run down and the engine will overheat. Once either of those things happen, you`ll have to stop driving and be stuck wherever you ended up.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

hey i had a belt break while traveling on my 2004 honda pilot. It is the small belt and not the serpentine belt. The mechanic t
ANSWER : Hello. The smaller belt is known as your timing belt, and it works inside the engine to keep mechanical components aligned with each other during the compression cycle. The serpentine belt, which is the big belt, drives the alternator, water pump, AC compressor, and a couple of other components. If the small belt broke it is likely the timing belt. This will cause the car to stall, lights to illuminate, and can even cause serious damage to the engine. Typically replacing a timing belt is a lot more complicated and expensive than replacing a serpentine belt. You may want to receive a second opinion on the car before you go ahead with repairs.

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Timing belt is tight and yet appears to be slipping several teeth when belt is rotated,
ANSWER : This is okay since there are more notches on the belt than the amount on the sprockets. Once you aligned the first time the belt marks will almost never line up perfectly again. The marks are used to put the belt on correctly. They aren’t used as an indicator after the engine is turned again. You should be okay to start the motor as long as timing marks on pulleys line up. If you run into any issues, have a certified technician, like one from YourMechanic, assist you with the replacement of the timing belt.

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Can you change the defected water pump without changing its defected belt (which is the drive belt and only belt in this model of
ANSWER : Hello. Yes you can replace the water pump without replacing the serpentine belt. If the belt is worn, and it breaks while you are driving, you can damage a lot of other components in that area. Typically the price of a serpentine belt is relatively inexpensive. You will have to remove the belt to replace the water pump anyway. Since you are likely going to have to purchase a new pump, we do recommend that you purchase a belt at the same time. You SHOULD replace the belt if it is worn, and this is a perfect time to do it. It is not necessarily required, but you are putting yourself at risk of another break down at a later time. Not to mention if the belt is already worn, manipulating off and back onto the vehicle while changing the water pump can further damage it, and shorten the amount of time its got left. Belts should be replaced before they break, as to the amount of damage they can cause when they do break. Again, you may be able to get away with not replacing the belt right now, but if its as worn as you say, its going to break sooner than later and should be replaced.

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Belts are cracked and need replacing, okay to leave off a/c belt?
ANSWER : Hello. If the belt driving the A/C compressor only drives the A/C compressor and nothing else, you can remove it with no consequences. The fan shroud is not optional equipment however as it has both a cooling system function and a safety function.

Depending on your climate, you might consider diagnosing the A/C system and repairing it. If you use a service such as YourMechanic, it will often be economical enough to do it, particularly if the fault is limited.

Even if the compressor shaft sealing is leaking (would be likely after 25 years), that is fixable in the field. Feel free to contact YourMechanic if you have additional needs relative to this or the replacement of your power steering, alternator, A/C belts.

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Timing Belt Cover replacement and External Belt too.
ANSWER : The parts are touching likely because either the parts were not installed properly or fasteners may be missing or broken. If oil has been leaking, this can cause the seal around the covers to swell as well causing misalignment. Consider hiring an experienced technician like one from YourMechanic who can come out and take a closer inspection of the belt drive to see what is causing the misalignment and offer a more personal diagnosis as well as estimate the proper repairs.

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Old belt was sqeeking, new belt does not but it slips off constantley. The old belt stays on though. Why is this?
ANSWER : Check to be sure that the new belt is actually the right part number or, better yet, use an OEM (dealer) belt. Also, be sure the tensioner is the right part number or use an OEM sourced tensioner. Check to be sure that all of the pulleys and accessories (e.g., alternator, water pump, A/C compressor) that are driven by the serpentine belt are all operating in the same plane. It is not unusual for the pulley on the crankshaft harmonic balancer pulley to move (generally outward) relative to its original position. The pulley is rubber bonded and over time can move. If that pulley moves, that means that the belt groves are no longer running in a perfect plane and that alone can cause slipping. If you request serpentine belt inspection a certified Mechanic, dispatched by YourMechanic right to your location, will identify the problem and thence get the issue resolved for you promptly. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

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Serpentine belt tearing apart by pebble & pieces of it getting inside timing belt, motor destroyed
ANSWER : Hi there. I agree with you – this doesn’t pass the ’smell test’. The only way for debris to enter the engine is through the throttle body. Since the throttle body inlet is protected and covered by an air intake on your Ford Fiesta, I highly doubt that this is the source of your problems.

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belt is missing, squeeling sound before stopped engine, once stopped saw smoke coming from engine department
ANSWER : Hi there:

In cases like then when you’re not sure what component needs to be replaced, it’s always best to have one of our professional mobile mechanics complete a car is hard to start inspection first. This will allow the mechanic to review your car for damage that is causing the symptoms you’re experiencing and then recommend the right replacement or repairs be completed to resolve your issue.

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