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-   -   Vacuum sound (https://www.dieselbombers.com/24-valve-2nd-gen-dodge-cummins-98-5-02/42968-vacuum-sound.html)

cummins602 02-09-2010 03:10 PM
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?

mishkaya 02-09-2010 03:35 PM
Originally Posted by cummins602 (Post 490854)
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).

cummins602 02-09-2010 03:40 PM
I. Have boost and pyrometer.

mishkaya 02-09-2010 03:43 PM
Originally Posted by cummins602 (Post 490906)
I. Have boost and pyrometer.
Were your EGT's above normal?

cummins602 02-09-2010 03:47 PM
No. They were normal

mishkaya 02-09-2010 03:50 PM
Originally Posted by cummins602 (Post 490912)
No. They were normal
My guess would definitely be the fan clutch then. It makes a definite swooshing sound! :c:

cummins602 02-10-2010 08:34 AM
Thank you mishkaya:tu:

Blackout_CTD 03-27-2010 02:36 PM
it could also be a torn innercooler boot


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