Disconnect the negative battery cable.Loosen the tension adjustment bolt with a socket wrench and remove the drive belt. … Remove the retaining bolt to release the idler pulley. … Compare your old idler pulley with your new pulley to check you have the correct replacement.
How do you remove an idler pulley?
- Disconnect the negative battery cable.
- Loosen the tension adjustment bolt with a socket wrench and remove the drive belt. …
- Remove the retaining bolt to release the idler pulley. …
- Compare your old idler pulley with your new pulley to check you have the correct replacement.
What tool removes tensioner pulley?
Most vehicles utilize a serpentine accessory belt, which powers items such as your power steering pump and alternator. The CRAFTSMAN® Serpentine Belt Tool provides the leverage and clearance needed to remove the tensioner pulley that holds the belt in place.
What can I use instead of a belt tensioner tool?
It turns out that a 1/4″ 3/8 drive socket fits nicely into the aforementioned 3/8″ square hole, while clearing the frame: One then simply needs a long enough open end wrench (or spanner, if you prefer) and a jack. Simply jack the tensioner up until you can remove the belt.
How do you loosen a tensioner pulley?
Turn the bolt head in the center of the spring-loaded arm of the belt tensioner counterclockwise with a ratchet and socket to loosen the bolt. The tensioner will rotate freely before it comes to a stop. When the spring-loaded arm comes to a stop, continue to turn the bolt until the bolt loosens.
How do you remove a crankshaft pulley without a tool?
There is a way to do it. You put a wrench on the pulley bolt and block the other end against the floor or the frame. Then you use the starter motor to turn the engine (DO NOT START IT, JUST TURN IT) for at most one or two revolutions of the crank. Just enough to break the bolt loose.
How do you remove a tensioner pulley bolt?
Put a socket on the bolt and turn the bolt counterclockwise to break it loose. If it will not break loose because the tensioner wants to move, keep the tensioner from moving by holding it in place with a pry bar; then you will be able to loosen the bolt in the pulley.
Is it hard to replace a tensioner pulley?
Serpentine belt replacement is easy because today’s automatic drive belt tensioners eliminate the need to loosen bolts or pry components into position for retensioning. … When the belt ribs are seated into the pulley grooves, release the tensioner and you’re done.
How is a crankshaft pulley removal?
- Position the puller in front of the pulley. …
- Install the puller-to-pulley bolts. …
- Using a breaker bar and socket, tighten the central puller bolt until the pulley slides off the crankshaft.
Is an idler pulley and tensioner pulley the same?
The primary distinction between tensioners and idler pulleys is the presence of an adjustable bolt. Tensioners are positioned on the bolt through mounting. Idler pulleys are not mounted to an adjustable bolt. … However, if bearings fail, tensioner and idler pulleys both require replacement.
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What size socket do you need for a tensioner pulley?
Inspect the belt tensioner pulley to see what size gap it has for a tool to fit in. If the gap is 1/2 wide and square, as is the case in many vehicles, a standard 1/2 inch ratchet will be sufficient.
Can a belt tensioner be to tight?
If the belt is too tight, it can eventually cause the bearings in either the tensioner, or one of the accessories (= the things being driven!) to wear to excess, which usually results in noise. If the belt it too loose, it will squeal, as the belt will be slipping on one or more of the pulleys, usually the alternator.
How do you remove a harmonic balancer pulley without a puller?
Most vehicle engines are now equipped with a pulley that holds the harmonic balancer apart from the center bolt. To remove the pulley, you need to rotate it a little with a screw driver’s help and pull it out using a pickle fork. You might not need the pickle fork; you can do that with bare hands.
What causes crankshaft pulley to break?
Each time the cylinders in the engine fire, torque is applied to the crankshaft. At certain speeds, the torque is in sync with the cylinders, which creates resonance. This resonance causes too much stress for the crankshaft. If this stress continues, the crankshaft will break and your vehicle will be inoperable.
Are crank pulleys reverse thread?
The crank bolt is not a reverse thread.
How long does it take to change a tensioner pulley?
What Is Tensioner Pulley Replacement? Replacing the pulley should only take an hour or two, and the parts will vary in cost from one type of car to the next.
How much does a new pulley cost?
The cost to replace the idler pulley of your driver belt will usually be somewhere between $80 and $200. The cost for the new part should only be anywhere from $40 to $90, while the cost of the labor will be anywhere from $40 to $110. These prices do not include added taxes and fees charged by the auto shop.
What noise does a bad pulley make?
Squealing. When the engine is idling, a bad pulley may make a squealing sound. This is due to the bearings in the pulley going bad. The bearings may also make various other sounds such as clattering or even a rumbling sound, making the vehicle sound as if there was much more wrong than a bad pulley.
What are the symptoms of a bad tensioner pulley?
If the tensioner is loose the belts may squeak or squeal, especially when the engine is first started. It is also possible for the tensioner pulley or bearing to wear out, in which case the vehicle will produce a grinding noise from the pulley.
Can you drive with a bad tensioner pulley?
Driving with a bad belt tensioner is unsafe since the tensioner is meant to guarantee ample tension that powers accessories. Wear on the belt tensioner will eventually cause the belt to slip, generate loud noise, and also create an unsafe level of heat along the accessory pulleys.
What are the symptoms of a bad idler pulley?
- Chattering, Squealing, or Chirping Sound. …
- Corroded Surface. …
- Excessively Loose Idler Pulley. …
- A Bad Idler Pulley May Spin Excessively. …
- Slow to No Spin or Binding.
What size wrench do I need to change serpentine belt?
Use a 17mm wrench to pull the tension back, then tighten the 13mm bolt which locks the slotted portion in the bracket. Remove the belt, this can be tricky if you are working with an inline drivetrain that is equipped with a mechanical fan.
How do you release tension from a lockdown tensioner?
If equipped with a tensioner screw, back off the tensioner screw. Then, push the alternator toward the other pulleys, loosening the belt. To loosen an NAI tensioner, loosen the locking nut or bolt, then back off the tensioner screw. Push the pulley toward the other pulleys or accessories, loosening the belt.
What is a tensioner pulley?
A tensioner pulley is a device that can be used to tighten the belt in any system of belts and pulleys. These systems typically consist of a number of wheels known as pulleys and a belt that is wound around them. … The other way to tighten a belt is to make use of a tensioner pulley.
