I have a 1991 Nissan 300ZX that has a squealing belt. A/C, Alternator and Serpentine belts have been replaced. It squeals for a few minutes at start up, then quiets. It also squeals when running the A/C. Any ideas?
I would check belt tension and then Idler pulley bearing..If still nothing check the A/C compressor clutch..
SOURCE: I need to adjust my fan belts on a Nissan 1991 300ZX Turbo.
Try spraying one item at a time with WD-40 or belt dressing. Try not to worry about doing the belt first and save it for last. Most causes of squeals are galzed belts from being too tight or the pulleys of whatever item, the bearings are going out or were improperly lubed.
This is the cheapest method to truoble shoot the annyoing noises.
Hope this helps!
SOURCE: need to replace the alternator belt for 87 nissan 300zx
there is a small pully on the top belt that has a long bolt on top loosen left turn and the pulley will go down . the alt .has 1bolt to pivit and a nut to tighten an hold .you will see when you look under car.
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