When i turn the truck on the fan pulley? im guessing is loose or something but not sure it makes a loud noise and now service engine light just turned on but not sure if that is the problem! what do i do?
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When the AC is turned on, a number of things happen: the cooling fan is engaged, the idle speed is increased to account for the additional load of the compressor, and the AC clutch is engaged. My guess is that what you are hearing is the AC Clutch rattling due to a worn input shaft bearing. As soon as it is engaged, the noise goes away. It is possible that something else is going on here, but I would be tempted to focus on the AC compressor as the SOUND portion of your problem. When you say "...she makes noise like loss of power or stalling, I am not sure what you mean. Is it a noise, or is it actually losing power. With no MIL (check engine) light on and if the noise goes away after servicing the compressor, I would say you are fixed up. Good Luck.
Hi Hayley the noise your descibing 9 times out of ten would be a pully belt slipping.MAKE SURE you have keys out of Ignition so engine is NOT runnig, preferably in your pocket so there are no accidents. Bonnet up and look down in engine compartment there will be some round pulleys, running on these pulleys will be one or two rubber belts grab each belt in turn and pull up and down there should be very little movement. If there is any slack, you would normally feel the slack because it should be fairly tought. This will no doubt be the problem. Tighten belt. You could confirm this with a second person LOOK in the engine compartment where the belts are fitted KEEP hands away and get a second person to start your car you may see the loose belt flap around when you accelerate you will also hear the noise from this area. If there is movement do not only check the belts but also the pulleys they run on there could be worn bearing on these pulleys creating the noise and excess movement replace or repair as needed. there may also be a loose or missing bolt on the mounts for these pulleys such as the alternator these are also common faults Good luck
if it isnt running hot or losing water id say no to both, maybe a bearing going bad in one of the pulleys but the truck isnt that old. id say check in the fan shroud to make sure nothing fell in there and make sure the blades arent hitting the sides while turning.
This is hard to answer without hearing the noise, a 2005 altima it would have to have alot of miles or have been drinen hard to need a motor mount, the compressor could be noisey or may be a loose heat sheild on the exhaust,a squeal noise would be a belt a rattle noise could be a pulley going bad or something loose, when ac is on it puts more strain on engine causing things to shake,i would have a second shop just look at it before doing anything, see if they both come up with the same problem, and dont tell them what the other shop told you about the mount, tell them only after they tell you its something else.
The fan might be "louder" because it may have been allot more quiet with the old failing fan clutch and not spinning fast enough.. Thus the new one working correctly making the fan spin much faster and being "louder"..
If that makes sense - to you question..
When you have the belt off, spin that idler pulley and see if it turns easily or makes noise. Check if the bearing feels good and smooth or if it wobbles any. While you are at it, check the fan and fan clutch to see if they turn smoothly also. There should be some resistance to the fan clutch, and make sure the fan isn't rubbing on anything.
Replacing the idler pulley is usually done as a unit since the bearing is part of the pulley.
The noise is most likely the serpentine belt. Check it's condition and that of the belt tensioner. It sounds like the belt is slipping, causing the squealing noise u describe. As the belt warms up, it's getting a better 'grip' and the noise stops. Turning on the heat also turns on the a/c in newer cars, this added drag on the belt (one more component to turn, the a/c compressor) would explain why it happens when u turn on the heat. Is the belt original? If yes, it's time to change it, and check the belt tensioner to make sure it's doing it's job of keeping the belt snug on all the pulleys. Let me know how u make out.
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