Where is the tensioner on an auto pulley?
Locate the automatic belt tensioner on the side or front of the engine. Inspect the tensioner to use the right tool to release the tension on the belt so you can remove it from the pulley. Some may feature a 3/8-inch square-drive or 1/2-inch square-drive inlet that an appropriate-sized ratchet or serpentine belt tool adapter will fit into.
What do you need to know about drive belt tensioners?
Average rating from 129,829 customers who received a Vehicle Engine Mechanical Inspection. A drive belt tensioner is a pulley mounted on a spring mechanism or adjustable pivot point that is used to keep tension on the engine belts. Spring tensioners are designed to tension automatically while the pivot design types can be adjusted manually.
How do you reinstall a serpentine belt on an auto tensioner?
Reverse the procedure to reinstall the serpentine belt on the pulley system auto tensioner. Be careful to get the belt on the the other pulleys and aligned properly on all parts of the complicated routing, then apply the tool to allow the belt to be slipped onto the tensioner pulley.
What does a loose belt tensioner sound like?
If the drive belt noise resembles a squeal or a squeak, it is possible that the belt tensioner is loose. This is especially the case when starting the engine first thing in the morning. Since the tensioner is not able to maintain the correct tension on the belts, it produces a squealing or squeaking sound.
What happens when a pulley on a tensioner goes bad?
A tensioner pulley guides the belt around the tensioner and allows the belt to spin while the tensioner maintains pressure against it. A failing tensioner pulley can cause power loss and damage to your belt-driven systems.
What does a belt tensioner do for a belt?
The belt tensioner is spring designed to provide proper belt tension, damping, and alignment of the belt. It provides constant tensi… . The tensioner gauge helps get the belt tension right with an accurate reading.
What causes a tension pulley on a car to squeak?
Learn how to fix a squeaky tensioner pulley in your car. The serpentine belt in your car powers the accessories such as air conditioning, power steering, the alternator, and waterpump. Tensioner pulley wear will cause your pulley to squeak. A worn out pulley bearing or a worn spring in the tension pulley can also cause squeaking or a chirp.
Where is the idler pulley on a Mercedes?
Pull the hood release under the dashboard on the driver’s side. Remove the engine cover by lifting it. Locate the idler pulley at the front of the engine. Remove the serpentine belt. Use a 17mm socket and ratchet on the tensioner nut to unload the tensioner.
How long does it take to replace tensioner on Mercedes Benz?
Replacing the drive belt tensioner on the Mercedes-Benz engine is relatively easy. It requires a few basic tools and approximately 30 minutes. This guide applies to the majority of Mercedes-Benz cars.
Can a tensioner be removed from an engine?
Automatic belt tensioners that are easily accessible may not be required to remove from the engine if you’re just replacing the pulley. Once the belt is removed from the pulley, you can remove the pulley bolt and washer and then remove the pulley to replace the new one.
What should the torque be on a Mercedes tensioner?
Torque the tensioner bolts to the recommended manufacturer specifications. Typical torque for the tensioner bolts ranges between 25Nm to 35 Nm. Check with your dealer. Install the drive belt. Make sure it is routed on all the pulleys properly. If the belt does not reach, make sure it is not sitting on top of one of the pulleys.
Do you need to replace the Mercedes belt tensioner?
In this guide, you will find step-by-step instructions on how to replace the Mercedes-Benz belt tensioner. While it is not required to replace the drive belt, it makes sense to replace it simultaneously as the tensioner. It is ok to reuse the old belt if it does not show wear, cracking, degradation, or drying.
What happens if you change the idler pulley on a Mercedes Benz?
Changing the idler pulley on a Mercedes-Benz is a relatively easy job for most DIYers and required less than two hours. A bad idler pulley can cause the serpentine belt to come off. Once the belt comes off, you will experience multiple problems if you continue to operate the vehicle. Power steering is difficult to turn.
Where is the pulley release on a Mercedes?
Pull the hood release on the lower left corner of the dashboard. Go to the front of the car and pull on the hood handle. Next, lift and secure the hood in the upright position.
Locate the automatic belt tensioner on the side or front of the engine. Inspect the tensioner to use the right tool to release the tension on the belt so you can remove it from the pulley. Some may feature a 3/8-inch square-drive or 1/2-inch square-drive inlet that an appropriate-sized ratchet or serpentine belt tool adapter will fit into.
What to do if idler and tension pulleys don’t work?
You’ll want to diagnose the problem before throwing parts at it and wasting money. The first part to rule out is the serpentine belt, to do this apply some belt dressing and then start the truck. If the noise goes away then the belt is the problem not the pulleys. If the sound still persists then you’ll need to check the pulleys.
Where is the tensioner on a Micro V belt?
Belt should be seated into all pulley grooves and belt spans free of contact with engine components. With belt routing solved, the tensioner must be located along with its direction and manner of movement. Serpentine belts are usually tensioned by a spring loaded idler pulley contacting the smooth backside of the belt.
Where is the tensioner on a serpentine belt?
With belt routing solved, the tensioner must be located along with its direction and manner of movement. Serpentine belts are usually tensioned by a spring loaded idler pulley contacting the smooth backside of the belt. The powerful spring that provides tension is located within a small cannister-like housing near the pulley.