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How do you know if your serpentine belt tensioner is bad?


How long does it take to replace a serpentine belt and tensioner?

Introduction. Automatic belt tensioners, standard in most cars now, make changing a serpentine belt a simple DIY repair. Follow the clear photos and step-by-step instructions and you’ll be done in 15 minutes.


How do I know if my belt tensioner needs to be replaced?

Appearance: Cycle the tensioner (mounted on the engine) through the entire range of motion (from stop to stop) by applying torque to the arm with a wrench. The tensioner arm should move smoothly and freely. Solution: If you notice a binding, sticking or grinding tensioner arm, the tensioner should be replaced.


How do I know if I need a new tensioner?

Grinding or squeaking noise from the belts or tensioner The most common symptom of a bad or failing drive belt tensioner is noise from the belts or tensioner. If the tensioner is loose the belts may squeak or squeal, especially when the engine is first started.


Can I run my engine without serpentine belt?

The short answer is yes, your car will start even if the serpentine belt is broken or missing. To get the car going, the battery sends power to your starter motor. The starter motor provides enough power to get your engine moving and the combustion process started.


Is timing belt same as serpentine belt?

You can easily tell the difference between the two when you look at the grooves. A timing belt has horizontal “teeth” designed to fit the cogwheels of the crankshaft and camshaft. A serpentine belt has multiple V-shaped grooves that run vertically along the belt.

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Will a bad timing belt throw a code?

A flashing check engine light is a sign that your car has picked up on an issue within the engine, typically for a timing belt failure or issue these lights will signal a CAM shaft/crank shaft correlation code. These codes can be diagnosed by a vehicle maintenance trained technician at your local mechanics shop.


Will check engine light come on for timing belt?

A loose or worn belt will cause ticking or rattling noises, poor engine performance and overheating, usually triggering the check engine light. If the timing belt breaks, the engine can’t run — and on some engines that break can cause internal damage.


What does an idler pulley sound like when it’s going out?

Idler pulley slippage is likely to follow after it becomes worn out enough. This will cause the pulley to bind and then rub against the engine belt. As a result, there will be squealing noises coming from the engine area that will only get worse until the pulley is replaced.


How do you check a serpentine belt pulley?