Weather related

pickup
nissan

#1

about two month ago replace a bad alternator and belt. about two week ago only when weather temperature change belt squeal as long as it hot no problem. if it start raining belt squeal if I hit the gas change the(RPM) it stop squealing until I get to a stop sign. and it start squealing again but like I said as long as weather is hot no problem.


#2

belt is probably too loose


#3

It looks like English but I can’t understand what you are saying.


#4

Bad or poor quality belt, tensioner not working properly, pulleys out of alignment or worn, or bad alternator alignment, pulley, drag. I dunno what else to say except those are pretty much the options. I only use Delco alternators anymore due to the crap that’s on the market but I haven’t had to buy one in years.


#5

Worn and/or glazed belt. It grips when dry, slips when wet. Time to replace it… check the tensioners and the pulleys, too.


#6

If the belt is new and looks ok, and the belt tension is correct, I’d guess the alternator you installed has a failing bearing. The replacement alternator is probably a rebuilt unit, maybe something wrong w/the bearing they installed to rebuild it, or they didn’t bother to install a new bearing. Double check the belt and belt tension and belt alignment first. But if those all look ok, you’ll probably have to replace the alternator with a known good one as a test to see if it makes the noise go away. If it does, a least you know the cause and can decide what to do about it at that point.

Edit: You could temporarily loosen the belt so the alternator didn’t spin too as a temporary test, as long as there’s nothing on that belt routing that is critical, like the water pump.


#7

Tensioner and belt are the most likely fix. The belt may be young in terms of miles, but if it’s been squealing it’s probably glazed.


#8

Attempt to turn the alternator pulley counterclockwise using a socket on the pulley nut. If the alternator pulley slips on the belt as it turns the belt tensioner is weak. NOTE; do not rotate the pulley more than about 1/4 turn backwards if it is not slipping on the belt. If the belt doesn’t slip it will rotate the cranksaft and camshaft backwards and in a few turns may damage the timing gear/chain.