I'm trying to tighten the V belts on my Nissan Frontier. I have a belt squealing. Is the lockdown nut/bolt for each adjustment located in the center of the actual pulley wheel ? If true, then I would loosen this first and then tighten/loosen via the tensioner bolt. Right ? Thanks for any help.
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2002 frontier 4 cyl: 1) take off air intake tube, 2 screws 13 mm above radiator. 2) 1st belt for power stirring has pulley, undo pulley screw and unscrew adjuster bolt enough to take belt off 3) 2nd belt for alternator and water pump has no pulley but adjusting bolt and mounting bolt on alternator pulley, loosen mounting bolt and unscrew adjusting bolt enough to take belt off, if alternator will not move go under the truck and remove plastic cover- 6 screws 13 mm heads, after that look directly under alt. Pulley and should see a screw head 9/16 in, loosen it so alternator can move, now should be easy to remove belt ( it will be a lot harder to put new one though) 4) 3rd belt for compressor has pulley so follow #2 to remove it ,have to be done under the truck. First 2 belts will have to work around fan blades to remove them so wear gloves. After replacing belts remember that not to over tighten bolt on pulleys.
And you want someone who has never seen or heard your vehicle,to disagree with the dealer. Go with the clutch. You may be able to try and sand the clutch face some, and possibly check and adjust the air gap,but a long shot at best.
I am assuming you are talking about a fan (or serpentine) belt. If you spent $95 to have it fixed two weeks agoa I'd go back and tell them it is not fixed and ideally they will give it another go for free. Squealing fan belts can be a royal pain. First thing is to check to be sure all the bolts that hold the various brackets for the different components (water pump, alternator, air conditioner, power steerig pump and thensioners) that the fan belt run on are tightened, There is a product called belt dressing that can give you (usually it is only temporary) relief. The fact the squeal stopped for two weeks and is now back does not make me think the problem is the tensioner. The squeal should never have gone away had it been the tensioner. It is possible it was the tensioner and it took two weeks to reglaze the belt but that is nbot likely.
Squeal belts usually mean not enough tension. I have had problem with persistance squeling in the past, the problem turn out to be cheap aftermarket belt that keep stretching and wouldn't maintain proper tension, putting brake fluid or any kind of oily liquid on your belt will make it worst not better.
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.