Need help finding the broken pulley...
#1
Need help finding the broken pulley...
I recently purchased a 2001 F150 4.6L V-8. The truck has 78K miles on and runs good except an annoying whine. I've heard it described as sounding like a super charger. It is constant, at idle or acceleration. I replaced the idler pulley because it was scuffed up but the whine persisted. I took the belt, which looks fine, completely off and the noise went away.
I checked all of the pulleys and they all rotate except for the bottom middle one, the crank shaft pulley. Should this pulley rotate by hand and if so can I replace this pulley? It is rusted pretty bad. If it's not this, any other ideas?
Thanks - Trevor
I checked all of the pulleys and they all rotate except for the bottom middle one, the crank shaft pulley. Should this pulley rotate by hand and if so can I replace this pulley? It is rusted pretty bad. If it's not this, any other ideas?
Thanks - Trevor
#3
Found Off Road Dominating
well if it sounds like a supercharger, and not a belt whine, it sounds like it would be your powersteering pump. When those start going bad they sound like a supercharger, dont ask me why lol. I would start there, but thats what it sounds like to me.
#4
To answer your question regarding the crank pulley: If you can turn this one by hand easily you have a real problem. This pulley is driven by the engine directly off the crankshaft(and pistons, etc) and drives the belt.
#7
Thanks for the suggestion
Well it was the power steering pump making that awful whine and it's gone now. I spent about $45 for the pump and fluid. The first time I pulled and replaced it it took me about 4 hours! I had to do it again because I couldn't get the pulley back on but the second time was much quicker, just over an hour. Sound is completely gone though so thanks for the advice.