Alternator pulley screeching..

[Bo525i]

Have had some horrible front end screeching going on these last couple of days, kinda got it pinpointed to the alt pulley by lubrificating the axel slightly (nothing hit the belt ) and the screeeeeeeeeech diminished for now

Should I open it and grease the bearings, change the pulley only or is it best to consider a brand new alternator altogether?

Thx in advance..

[whiskychaser]

Have had some horrible front end screeching going on these last couple of days, kinda got it pinpointed to the alt pulley by lubrificating the axel slightly (nothing hit the belt ) and the screeeeeeeeeech diminished for now

Should I open it and grease the bearings, change the pulley only or is it best to consider a brand new alternator altogether?

Thx in advance..

Doubt if its the pulley itself. Its going to be the belt or the bearings. If it were my car I'd spray WD40 on the pulley where the belt runs. If it stopped screaming I'd know the belt was slipping. If not, I'd be replacing the belt with the alternator anyway

[Tiger]

You need to check the tensioner pulley... take belt off and spin it... if you feel rattle or hear it, you need new one. Change your belt while you are at it.

[Bo525i]

No. 6 right?

[Tiger]

Yep... and 14 is a pulley too?

[Bo525i]

Thx Tiger!
No. 14 is a so called Deflection pulley, i might just change that too!

[Bo525i]

Fixed it, was´nt the pulleys they all ran just fine.. All of a sudden my car started to loose charge while driving to the point where everything shut down.. all the lights dimmed, abs light came on @ 9.56 volts, the blinkers stopped working, @ 6.74 even the engine electronics wanted to shut down and so on.. Everytime the car reached those low low levels I´d idle it for like 100m and the charge went up just enough for the electronics to work for a short time again, horrible way to drive, thank god I was close to home when that went on!

Turned out to be a shot alternator so I got hold of a new used one with only 69000 miles on it, cheap too Well took the old one out, mounted the new one and changed the belts while I was at it and now all´s back to normal.

[632 Regal]

Been meaning to replace mine for 2 years due to same problem but it hasn't scared me enough to actually do it yet. Glad you got it fixed.

Fixed it, was´nt the pulleys they all ran just fine.. All of a sudden my car started to loose charge while driving to the point where everything shut down.. all the lights dimmed, abs light came on @ 9.56 volts, the blinkers stopped working, @ 6.74 even the engine electronics wanted to shut down and so on.. Everytime the car reached those low low levels I´d idle it for like 100m and the charge went up just enough for the electronics to work for a short time again, horrible way to drive, thank god I was close to home when that went on!

Turned out to be a shot alternator so I got hold of a new used one with only 69000 miles on it, cheap too Well took the old one out, mounted the new one and changed the belts while I was at it and now all´s back to normal.