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CATEGORY LISTINGS > CATERPILLAR > Howl/Roar When Pulling. [ REFRESH ]
Thread Title:

Howl/Roar When Pulling.


Created On Sunday June 08, 2014 13:23 Diesel Talk
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frliner
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Posts: 28
Joined: Mar 2010

Note Sunday June 08, 2014 13:23 View thread in raw text format
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2001 Western Star 6NZ 475hp. With Cruise set or using foot, at highway speeds when truck starts to pull a grade of any size a roar/How comesl from the engine area. when the pull is done it goes away (sometimes it comes and goes). only get it when into a pull. Going thru the gears there is no unusual noises.
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Brent
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Joined: Nov 2011

Note Monday June 09, 2014 16:36 View thread in raw text format
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I would look for a hole in a air charger boot, Line from the air compressor to the intake that's under boost.
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