Squealing Noise Until Operating Temp
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The_Josh_Bear
Full Access Member
My 3G alt has never squealed unless it got wet or something, and I've tortured my batteries at times. So chalk me up as one that gets away with it, but that's also why I'm a believer in the wax stick! And tightening the alt belt nice and snug.
My fairly new 3G alternator was squeaking when I started my truck tonight, but it was probably getting wet because my water pump is leaking. And my power steering pump is trying to kill itself.
I think I might just convert to serpentine… I have all the parts to do it… I might regret it but then again perhaps not
I think I might just convert to serpentine… I have all the parts to do it… I might regret it but then again perhaps not
IDIBRONCO
IDIBRONCO
I do.We don't need no stinking brakes!
Because it's fun!Why do you always gotta come in and make sense?!?
I can't quite say that. Mine used to squeal sometimes until I bought a gates green stripe belt. I also don't use mine to the fullest most of the time. If it makes any difference, I'm pretty sure that it's a 130 amp and not a 150 amp.
rvitko
Registered User
Yeah I double checked and it’s the 130 amp power master conversion. I’ll try the green belt and the pencil. Thanks! I’ve mostly just lived with it because I have a 94 turbo motor to transplant in and that’ll mean a serpentine conversion but it’s been on a stand for 2 years, I need a few grand to finish that project so it may be a while longer.
IDIBRONCO
IDIBRONCO
Well you could always swap over the serpentine parts. They'll go right onto an older engine.
03wr250f
Full Access Member
as others have said likely belt noise. Pulling the belt and firing it up will confirm that.
I would be questioning the belt itself, try putting valve grind compound on it, and see if it helps.
as others have said it could be alternator, causing the squeal, and that is most likely, also how is the tensioner? is it keeping proper tension on the belt to prevent squealing?
I have had bad fan clutches cause that as well, where they would slip the belt because they were fully locked and wouldnt unlock for a long time, and it was a new clutch.
On my truck i swapped the 3g alt, serp to a smaller mustang pulley to spin it faster for more charging at idle, it caused squealing on startup when the glowplugs were running because the lack of tension could let the belt slip.
I ended up going to a 1/2'' shorter belt, and upgrading the charge cable size and now at idle i charge at 14.0 with blower on high, radio on, my auxilary reverse lights, fog lights, and headlights/ high beams with light bar and pod lights on, etc full load. I used to charge at 13.1 with the same load.
I would be questioning the belt itself, try putting valve grind compound on it, and see if it helps.
as others have said it could be alternator, causing the squeal, and that is most likely, also how is the tensioner? is it keeping proper tension on the belt to prevent squealing?
I have had bad fan clutches cause that as well, where they would slip the belt because they were fully locked and wouldnt unlock for a long time, and it was a new clutch.
On my truck i swapped the 3g alt, serp to a smaller mustang pulley to spin it faster for more charging at idle, it caused squealing on startup when the glowplugs were running because the lack of tension could let the belt slip.
I ended up going to a 1/2'' shorter belt, and upgrading the charge cable size and now at idle i charge at 14.0 with blower on high, radio on, my auxilary reverse lights, fog lights, and headlights/ high beams with light bar and pod lights on, etc full load. I used to charge at 13.1 with the same load.
