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Vacuum sound

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Old 02-09-2010, 03:10 PM
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Default Vacuum sound
3 days ago I was starting to leave the house, and I noticed from take off to about 30mph, there was a loud vacuum sound, does this have anything to do with the vacuum pump itself? Or is it something else?
 
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Old 02-09-2010, 03:35 PM
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Originally Posted by cummins602
3 days ago I was starting to leave the house, and I noticed from take off to about 30mph, there was a loud vacuum sound, does this have anything to do with the vacuum pump itself? Or is it something else?
I sincerely doubt you would be able to hear a leak from the vacuum pump over the noise of the engine. I would rather think it was the fan clutch that was engaged momentarily. This can happen when the truck is cold an first started up, usually goes away within a minute. Do you have gauges? (Boost, EGT).
 
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Old 02-09-2010, 03:40 PM
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I. Have boost and pyrometer.
 
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Old 02-09-2010, 03:43 PM
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Originally Posted by cummins602
I. Have boost and pyrometer.
Were your EGT's above normal?
 
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Old 02-09-2010, 03:47 PM
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No. They were normal
 
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Old 02-09-2010, 03:50 PM
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Originally Posted by cummins602
No. They were normal
My guess would definitely be the fan clutch then. It makes a definite swooshing sound!
 
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Old 02-10-2010, 08:34 AM
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Thank you mishkaya
 
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Old 03-27-2010, 02:36 PM
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it could also be a torn innercooler boot
 
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