My engine became very loud after a new ac compressor and serpentine pulley was put in. It does it only when driving. When the car is in idle there is no noise. It's sluggish and hard to steer

Ned C Cook

• 3433 Answers
• Posted on Aug 27, 2009

SOURCE: Hello, I purchased a 2003 Hyundai XG350 last

See if it goes away when you turn the A/C off. The a/c comes on when you sre in the defrost so yo don't hit the windshield with hot air. The screaching is more than likely the A/C clutch trying to engage, that why it was overlooked or ignored by the mechanic. It is a common thing. The battery should be allowed to recoup from the starting of the car which a few minutes of running woll help so the a/c clutch gets full battery voltage to function.. Turning on the defrost and /or the A/c after about 3 minutes of warm up. Open your hood and have someone turn the a/c on and off, you can hear and sctually see the a/c clutch doing its irritating thing.But keep your fingers out off the engine and don't lean over it with loose clothing. Good Luck, Ned

SOURCE: after having my drive belts, timing belts, changed

its posible that one motor mount is not adjusted properly,mechanics use to remove it to work timings belt steering suspenssion problems are common when mounts are loosed or broken ok go back to shop and ask for a mounts inspection .,99% sure its.GL

Ron

• 249 Answers
• Posted on Oct 12, 2010

SOURCE: My daughters car is hard to steer and makes a loud

Those cars have manual belt tensioners and sounds like it needs to be adjusted because it has stretched the belt.

SOURCE: Have a 2001 Hyundai Santa Fe v6 2.7liter. Ac compressor locked up and broke the serpentine belt.

Try A/C compressor clutch bypass. I believe some that I looked up were about $40-60 made by Dohrman. Your car is Foreign so it may be much higher. They are available through autoparts stores.

I searched and Advance Autoparts had some for different cars and a 15% Online discount. But you need to look at what has to come off to install it.

Also the part may show 6G where G is the number of grooves on the belt. This is crucial.

Depending on the configuration of the pulleys, all you may need to do is use a smaller belt and leave the old stuff in place. If A/C was an option for your car, try a belt from a VW without A./C.

You just need to remember that the Tensioner pulley has to work or the belt will slip off. That gives you a little leeway. Check for a different Tensioner pulley for the Non-A/C equipped VW which may be needed for this change.

SOURCE: my ac is only cold when I am driving, my heat is only hot when I am driving, not getting cold air or hot air in idle position?

So many mechanics, so little consensus. Sounds pretty common.
I can't say as to why hot and cold only when moving, but it sounds like a weak performing system.
As for the squealing, I would suggest removing one belt at a time, and see if one eliminates the squeal. That would be the problem belt or pulley or component. Also, if you have any idler pulleys (a stand-alone pulley) on the belt system, be sure and check them as well. Spin them without the belt on, and see if they make any noise.
It would seem you need a mechanic who is willing to spend some time with you on this to find the problem. When you find a good one, you will know it by his output, and make yourself a regular customer. Good luck.