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6.0L Power Stroke Diesel 2003 - 2007 F250, F350 pickup and F350+ Cab Chassis, 2003 - 2005 Excursion and 2003 - 2009 van

Squealing under load

Old Aug 18, 2010 | 09:14 AM
  #1  
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Brojon2002
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From: Washington
Squealing under load

When we pull out 10,000lb toy hauler up hills we notice a squeal (like a bearing going out) from under the hood. It seems to be mainly around 3,000 rmps.

It will only do this with the AC if off. If I turn the AC on it almost goes entirely away instantly.

We have had the belt and tensioner replaced as the dealer said that's what was making the noise. "WRONG" It did this before and after the parts were replaced.

What do you think?
 
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Old Aug 18, 2010 | 11:12 AM
  #2  
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Nice Work Truck
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From: CT
Get under your truck and look up between the motor and firewall.
If the firewall is covered you might have a cracked Y-pipe or up-pipe.
Mine is doing the same thing and is going in for a cracked Y-pipe
 
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Old Aug 18, 2010 | 11:53 AM
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From: Augusta, GA
Mine was opposite, squeeled with AC on, it was the tensioner pulley assembly.

Yours might be the belt.

I replaced my tensioner and it went away. I am going to swap the belt this weekend.
 
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Old Aug 18, 2010 | 05:48 PM
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Check all of you CAC boots.
 
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