I own a 2003 Mitsubishi Galant 2.4L ES. When i turn my car on the Auxiliary belt makes a squealing noise for a bit then it stops. But it doesnt always make this noise, and it has something to do with when the fan is on and defrost is on. I think there is a manual tensioner that needs to be tightened but im not sure where it is. Where is this manual tensioner located so i can tighten it.

What is causing that irritating noise? ' DSMtuners

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Get the car towed to the nearest Mitsubishi dealer, for professional trouble-shooting and repair.

For a manual transmission, this means your clutch has completely failed. The loud noise was likely not a belt, but the cluch release bearing. I'll bet this was a screeching noise that reduced or stopped when the clutch pedal was depressed.

You'll need a new replacement pressure plate, driven plate, release bearing and anything else that is found to be worn out when the the transmission is removed to do the job. A garage would need 4-6 hours labour to do this.

SD

Misfire means you need spark plugs replaced. Or spark plug coils.

That's why the whole car starts shaking because its running basically on 3 cylinders and not 4 as supposed. There is no gas compression on the 3rd cylinder because once again the spark plug is "misfiring"

There also might be even a bigger problem which could be the distributor cap where the coils are connecting outside the engine.
once you fix the problem the check engine will turn off immediately

hope that helps.

The probable causes are: 1. The drive belts are slipping. 2. The drive pulleys for some engine accessories are misaligned. 3. You have turned the steering wheel to the limits. 4. The drive belts are loose.5. Your brake drum backing plates are rubbing against the brake drum. The brakes also might be a problem. check the brake drums/discs. Finally check your wheel and wheel alignment.

Be gentle with my rating. I am a long ways away. It sounds like a fan belt. You should pop the hood next time and see how it sounds when you have the squeeling going on. Fan belts will squeel until the get warmed up and then stop because the heat makes them grab the way they are ment too. Let me know, Raz

Your belt is loose (and it just needs tightening) or it is worn and needs to be replaced. It may look ok but they glaze over; all the little ridges get shinny and slip.

do you have spark? How do you know if your timing belt is good? sometimes it doesnt break just shed the teeth which could be missing under the crankshaft. The best way to check is to have two people. have one try to start the car and see if the camshaft is actually spinning. The crankshaft will always turn but if the teeth are gone on timing belt this would cause the belt to stay in one position not moving the camshaft. so if you can remove the upper timing belt cover and do this quick inspection with someone that will tell you for sure. if it does look like it is spinning then by hand turn engine very slowly with plug coil wires removed. and make sure teeth are all there. It couldve jumped timing. (valve timing)

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.

Your timing belt might have busted. Mine did that in November of 2007.... I had to replace 2 of the 4 cylinders, along with the timing belt and housing. Total cost was a little over $1700.00