My guess is that you have some oil on the belt or that your belts aren't quite the right size. It may be that the belts are selected by the shop for a close but maybe not an exact fit to reduce the amount of belts needed as inventory.
If you have oil on the belt, find the source of the leak and fix it. Otherwise, verify that there's nothing wrong with the belt and tighten it. If it has been adjusted to the tensioner's limit of travel, you'll have to replace the belt.
I like to adjust my belts as loosely as I can because I think it's easier on the bearings. This is not practical for a repair shop that should adjust to specs.
No. But what you do need to be aware of is that the alternator/water pump belt on the 1.8l engine needs to be run rather tight. If you don't get it tight enough, the alternator will squeal like crazy. More than likely, that is the belt that is causing your trouble. If you have the 1.8l BP engine, that is where I would start troubleshooting. With a cold engine, start it and run it for a few seconds until the belt starts making noise. Then shut it down. Pop the hood and stick your hand down by the alternator. If the alternator pulley is hot, you just found your problem.
Depending on how long you drove it after it started making noise the first time, you might have glazed the new belt over, in which case the only fix is to replace the belt again and properly tension it. The shop you had service the car should warranty the work if they are reputable.
If you can lay a straight edge against the two pullys, you can check to see if they are in alignment.If something isn't dripping onto one or more pulleys or the v belt, might be something wrong with the v belt.Could be the v belt is the wrong size/length.V belts grip along the sides, not on the bottom.Get enough miles/wear and tear on them and they will stretch. cuhulin
Electronic wireless temperature sensor in my flower box on my front porch said it got up to 70 degrees this afternoon.It is 65 degrees out there right now, loads of bright Sunshine too. cuhulin
Tomorrow, I am driving my big old 1983 Dodge van to a shop for two new mufflers and new tail pipe.Those exhaust fumes are killing me!
When my v belts get loose, I get a few of my old pawn shop tools and I tighten up those v belts myself. Old rule of thumb ''Trick'' is, if you mash down kind of hard on the v belt with your thumb, and if the v belt pushes down more than half an inch, (or is it an inch? I forget) the v belt should be tightend up a little bit.Some auto parts stores sell v belt dressing stuff for squealing v belts.
57 degrees out there in my flower box on my front porch right now.74 degrees inside of my house. cuhulin
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