Whining from idler pulley?

va01gtstang

New Member

Apr 28, 2005

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Feb 5, 2006

#1

• Feb 5, 2006

• #1

Went to the local meet ups couple weeks ago and this fellow mustang owner first asked me what kind of blower I had because he heard my car whining. I told him it was just my MAC Straight Shot intake and he told me that my idler pulley was bad. I got my motor built a couple of months ago with p&p heads and comp cams. Before I got the motor built, you could hear the intake whine then after the heads got done it whined even louder. I was told it whined louder due to the fact that the motor was ingesting more air. So is it true my idler pulley has gone bad?

 

va01gtstang

New Member

Apr 28, 2005

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Feb 5, 2006

#2

• Feb 5, 2006

• #2

Also, I never heard this sound until after I installed the intake. If it happens to be the idler puley, is this a major problem and will it hurt my motor's performance?

 

Mike97gt

it doe snot

Founding Member

Jan 26, 1999

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the people's republic of massachusetts

Feb 5, 2006

#3

• Feb 5, 2006

• #3

well it is impossible to diag sound over the internet. but i will tell you a bad pulley can sound like that.

 

K

Kilgore Trout

Fried or Broiled ?

10 Year Member

Mar 30, 2005

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Feb 6, 2006

#4

• Feb 6, 2006

• #4

Take off the belt and f'n inspect the idler pullies

 

M

Mindstatic Pro

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Jan 15, 2006

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Feb 6, 2006

#5

• Feb 6, 2006

• #5

Remove the belt and inspect the pulleys. Make sure they arent wobbling on the bearings. If needed, remove the pulleys and check for squeaks. The idler pulleys should only be $5-$10, next to all the other mods this should be pretty minor. If the pulleys werent replaced when the motor was rebuilt it wouldnt hurt to get some new ones. Bad bearings in your pulleys can rob you of horsepower. Not much but every little bit counts.

 

Gearbanger 101

Straight Outta Locash

20+ Year Stangneter

Aug 10, 2002

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Ontario, Canada

Feb 6, 2006

#6

• Feb 6, 2006

• #6

Kilgore Trout said:

Take off the belt and f'n inspect the idler pullies

Click to expand...

Sometimes the easiest solutions are the hardest to see.

 

M

Mindstatic Pro

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Jan 15, 2006

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Feb 7, 2006

#7

• Feb 7, 2006

• #7

BWAHAHAHAHAHAHA

 

Henceforward

The Avatar Master

Founding Member

Jul 17, 2001

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Feb 7, 2006

#8

• Feb 7, 2006

• #8

I just purchased a new Belt Tensioner pully at the parts store yesterday for $15. Usually the bearings go bad, and squeal very annoyingly. Simple fix, 10 minute job.

 

ironmedic

New Member

Mar 18, 2003

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Puyallup, WA

Feb 7, 2006

#9

• Feb 7, 2006

• #9

i would venture a guess and say that your pistons are broken. they squeel as they go up and down. go buy some new pistons from autozone. it is a 10 min install

 

DropTopPony

Noob Slayer

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Aug 13, 2002

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south jersey

Feb 7, 2006

#10

• Feb 7, 2006

• #10

If its the pulley, its a easy fix. They tend to chirp like a bird when going bad until they start to squeal. This isn't something you want to let go. Its a $10 fix. Get yourself a Haynes Manual for your car and read up some.