How many belts on a 2004 lincoln aviator. And if replaced still hearing a clicking noise what is the problem

ANSWER : Hi there. There is only one belt on the engine to drive all of the accessories. The clicking sound could be an accessory pulley out of alignment or a bearing in the accessory going out. The belt will make a chirping or squealing sound when it gets loose or damaged. If you need further assistance with the noises on the engine, then seek out a professional, such as one from Your Mechanic, to help you.

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. If this occurred right after the compressor was replaced then I would look at the compressor as the issue. If the correct oil and quantity was not added to the compressor then this will occur. If the compressor is not mounted securely this can also happen

Before warrantying the compressor I would check the work around it to make sure that there is nothing loose like an engine mount or any of the mounting bolts. I do not think that this is an idler pulley.

If you need to have this looked at, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose the noise firsthand for an accurate repair.

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:

If the mechanic completed the O2 sensor replacement, reset the codes and the error code was triggered again, it is possible that the catalytic converter is damaged and needs to be replaced. However, it’s also very common for the electrical harnesses that power these sensors to become frayed, damaged or faulty; which can also trigger the check engine light. It’s not advisable to drive a vehicle with a damaged catalytic converter for extended periods of time, as it can cause damage to internal engine components.

ANSWER : Hello. If the belt driving the A/C compressor only drives the A/C compressor and nothing else, you can remove it with no consequences. The fan shroud is not optional equipment however as it has both a cooling system function and a safety function.

Depending on your climate, you might consider diagnosing the A/C system and repairing it. If you use a service such as YourMechanic, it will often be economical enough to do it, particularly if the fault is limited.

Even if the compressor shaft sealing is leaking (would be likely after 25 years), that is fixable in the field. Feel free to contact YourMechanic if you have additional needs relative to this or the replacement of your power steering, alternator, A/C belts.

ANSWER : Hey there. You have a bad battery or there is a bad connection in the starting system. The battery should be load tested and the state of charge should be checked with a hydrometer. Your starter requires about ten times more power from the battery than any other system in your car. Even if the headlights and all other electrical components work, it is not a good indicator of the condition of the battery. So a thorough testing of the battery should be performed first.

If the battery checks out, then the problem is a bad connection in the starting circuit. The first test I do, which may be irrelevant since you have already replaced the starter, is to tap on the starter with a hammer while someone is attempting to start it. If it cranks the motor, it needs a starter. It is possible a new starter is bad, so there is still some value in performing this test.

If this doesn’t reveal a bad starter, another simple and test is to attempt to crank the car for up to thirty seconds. Pay attention to smoke or any electrical burning smells that might occur. If you experience one of these, immediately stop and look under the hood for a hot spot in the battery cable connections. Feel both battery posts, the positive and negative battery cables, the ground connection at the frame and the main power connection at the starter. If any of these are hot or warm, it is a bad connection.

If that doesn’t reveal anything, the next step is to use a test light to see if the starter solenoid is getting power from the ignition switch. If it is not, you will need to use a test light to find our where the connection is lost. The suspect parts are the ignition switch and the neutral safety switch (aka the transmission range switch). You will need access to a wiring diagram and a test light for this portion of the testing.

If you should require further assistance, I recommend having a professional technician, like one from YourMechanic, diagnose your starting issue so that this can be repaired.

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.