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Water Pump Pulley Squeal - intermittent
2005 with 60K. Around 50K started to hear squealing noise from pulley/belt area. Got this car with a bit over 30K on it. There was some slight squealing but never happened when the dealer looked at it before the warranty ran out. The belt looks like it was already changed once because it's very new looking still at 60K. No cracks, etc. and rubber looks new still.
I've used a flex tube to listen to all the pulleys for the exact location of the squeal and it comes from the water pump's pulley bearing area. The squeal is not from where the belt contacts the pulley. It was getting bad so I sprayed some WD40 on it and it quieted down. Squealing came back intermittently so mechanics couldn't observe/hear it when I brought it in (of course). It could be squealing at start up but by the time I drive maybe 4 miles the sound may go away. (I know it sounds like belt problem) Once the squealing was bad so I used a lithium spray, instead of WD40, on the bearing area of the pulley and it's worked pretty well to keep it quite for a long time but now that seems to have played out and the squealing is coming back again and can persist for the whole time I'm driving but it still could just go away the next time I start the engine to go to the shop, which seems like always.
No overheating so water pump seems to be working fine. I thought I could find a pulley to change out but no one sells just the pulley. You need to replace the whole water pump.
Some keep saying it's the belt, it's the idler, but the noise comes right from the bearing of the water pump pulley.
Any suggestions as to what to do. I don't want to change the pump, belt, or idler for nothing.