I have a clicking noise coming from my serpentine belt.

ANSWER : If the battery is weak and the voltage is dropping to below 9 volts you will get the clicking without the starter turning the motor. Have the battery voltage checked and if battery cannot hold a load then replace it and clean the battery terminals and recheck system to see if it starts.

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.

ANSWER : Hi there. Although it is hard to pinpoint the exact source of this noise via a video, it sounds a lot like an exhaust leak. When the exhaust manifold of exhaust tubes age, they are exposed to elements, creating weakness in the metal and eventually will crack or break. It is also possible that this sound is caused by cylinder head hardware that is loose (such as lifters or rocker arms) or not getting enough lubrication. Again, without being there it is impossible to know for certain, but you might want to have a professional mechanic complete a car is making a noise inspection to determine what is causing this issue.

ANSWER : Hello there. It is possible that the serpentine belt is not installed straight, which tends to create the type of squeaking noise you are talking about. It is also possible that the pulley was not properly lubricated. If either of these are true and causing the squeak, it should be corrected sooner rather than later, as it can lead to premature wear and tear. The best way to correctly diagnose this problem is to have a professional mechanic come to your location and complete a car is making a noise inspection.

ANSWER : Hello – I believe the humming noise you mention in the right front wheel area is a worn front wheel bearing/hub assembly. If the noise is louder when turning left while in motion, that would confirm the diagnosis. I would recommend having the right, front wheel bearing replaced by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs. The clicking noise while turning the steering wheel may be a problem with the upper steering shaft in the steering column. Cadillac has issued a technical service bulletin for problems with the steering performance (# 232985). Check with your Cadillac dealer service center for more information on this repair.

ANSWER : Hi there. In most cases, this type of clicking sound is caused by a belt that is slightly frayed and hitting a shield or other mechanical component. It’s also common for a worn out pulley or idler tension pulley to cause a clicking sound as the belt spins. If the sound increases as the vehicle RPM’s increase, then it’s likely with the belt or pulley itself. It would be a good idea to have a professional mechanic come to your location to complete a car is making a noise inspection, so they can isolate the source of this noise and recommend the right replacement.

ANSWER : The noise you are hearing is one of the HVAC door actuators that control air flow or temperature for the a/c. There are at least 4 of these actuators in your system and one of them is going bad and would need to be replaced. The one that is making the noise It’s hard to specify wxactly which one without checking the system first hand. In order to find the one going bad a mechanic would have to have their hand on each one and turn on the a/c and feel to see the failing actuator. Only then can a complete diagnosis be done. I recommend having a mechanic. like one from YourMechanic, come to you and diagnose your HVAC problem.

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.