Basically what I mean by this is, spinning freely does not need to mean it will continue to spin without stopping, but rather spins without binding. The main thing to look for in these pulleys is if, when turned, they are completely smooth to the touch and turn without much resistance, they are probably in good shape.
Should all pulley spin freely?
The only pulleys you should be able to turn by hand when the serpentine belt is not in place are: the water pump, alternator, and power steering pump pulleys. The air conditioning compressor has a clutch on it that should spin freely as well but it will not be rotating the internals of the compressor.
Should a belt tensioner move at all?
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 you check a timing belt tensioner?
Press on the belt between the pulleys. It should not move more than about ¼ inch. Tip: If the belt is loose, then the tensioner should be replaced. This is also a good time to check the timing belt.
Does an idler pulley rotate?
First, let’s start with visual cues. Like many automotive parts, the idler pulley becomes worn over time. The pulley spins against the belt wearing down both parts.
What happens if I turn my crankshaft counterclockwise?
This will not cause any damage to your engine. If using the main bolt in the end of the crankshaft, you do run the risk of it loosening when turning it CCW … but that isn’t a big deal either. Just tighten it back up by cranking it back over CW, then get the crank back to where you want it to be.
Should power steering pulley spin freely?
Should the power steering pulley spin freely? Like all the other driven pullies, the power steering pulley should freely. There might be some resistance, but nothing that will stop you from spinning it by hand when the serpentine belt is off.
How do I know if my tensioner pulley is bad?
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.
How do you tighten a timing belt tensioner pulley?
Start by finding the appropriate force. And deflection for your belt from the manufacturers specs. Then using a straightedge against your belt as a point of reference. Position.
How do you tighten a belt tensioner?
But they can also be located on the power steering pump or even the air conditioner compressor first loosen the pivot bolt and lock bolt. Next adjust the tension bolt.
Why is my tensioner pulley not spinning?
If you hear grinding or the pulley doesn’t spin freely, replace the tensioner. When you replace the belt, it should take a lot of muscle power to move the tensioner. If you can move it easily, the spring tension is most likely not tight enough. You can also check the tensioner by checking belt tension.
Can you over tighten an idler pulley?
A belt shouldn’t be over-tightened. Any bearing that the belt rotates on can be burned out by an over-tightened belt. A pulley bearing can be ruined by an over-tightened timing belt.
Is the 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.
What is a deflection pulley?
Deflection plastic pulleys or diverting elevator wheels are the pulleys which enable the rope to reach to weight properly by changing the direction of the rope.
What happens if idler pulley fails?
A broken or seized pulley can quickly lead to a torn belt, or in less serious cases, the belt falling off of the engine. An engine without a belt can quickly run into issues such as overheating and stalling, as it’s the drive belt that allows the engine accessories to function.
When should I replace idler pulley?
50,000 to 100,000 mile
An idler pulley is expected to wear over time, and eventually the pulley will fail. Replacement intervals for idler pulleys vary, but are usually within the 50,000 to 100,000 mile range. Replacement often coincides with expected serpentine/accessory belt replacement periods.
How long do tensioner pulleys last?
The Owner’s Manual Says that It is Time
Most modern cars that roll off the dealer’s lot as a new vehicle will have a 60,000 to 100,000-mile life expectancy for the serpentine belt, tensioners, and idler pulleys.
What causes crankshaft pulley failure?
All components come with a recommended torque, this should be checked before the parts are tightened. Similarly, if the belt tension is too strong or the auxiliary equipment has failed the pulley will also fail. The cause is linked to the coupling having made contact with the flywheel rim.