scottyboy

i have a 2010 ford f150 with the 5.4l and my grooved idler pulley between the crank pulley and ps pump when the engine is at idle u can see the pulley move like wobble on its shaft so i got a new one popped the old one off and put the new one on and its still loose so is there something besides the washer and bolt that go on it or is there a bushing between the shaft and pulley.

does anyone also know the inside diameter of the pulley thanks

BlueCountry

The pulley is one piece and all you need. There should be almost no play when you slide the new one onto the engine. Did you double check to make sure you got the right one? Where did you get it?

scottyboy

i bought the pulley at canadian tire and i checked around and all the pulleys i could find at other shops say the inside diameter of the bearing is 17mm which is what i measured off the oem one that is on it

scottyboy

is there any reason that would cause the shaft that the pulley sits on the be worn down

BlueCountry

When did you know notice this? Was it making a sound?

scottyboy

about a month ago i noticed that the belt started squeaking like a pulsing squeak so put on a new belt and looked at the old one and noticed that on the side in certain spots it had worn down the cords so fired it up with the new belt on and no more squeak but noticed that the pulley wobbled still which it did with the old belt to. i measured the shaft and its 16.5 mm and the pulleys 16.5mm so i cant work out why it wobbles i have the washer on the nut and tighten it up but still wobbles. there is no sound at all to it at the moment

abgiles

I'm assuming since you didn't take it to Ford, you're over the warranty period? Is this covered by the powertrain warranty? It never hurts to ask. Something like that should be covered.

scottyboy

no i havent taken it to ford yet reason is because im hoping to become a mechanic and i enjoy working on them but this one has be confused so im going to take it in its a 2010 so still lots of warranty. maybe its just me and that the idler pulley wobbles on this engine

smurfs_of_war

It definitely shouldn't. You would chew through belts like a mad man

F150orelse

I noticed this was an old thread but my grooved idler pulley does the same, I've replaced it with a new one which does the same.