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Old 06-03-2016, 10:39 AM   #1
mineralslee's Avatar
Join Date: Feb 2010
Posts: 53
Exhaust noise in cab when exhaust brake engaged

In the foot hills of north Ala. Started noticing air leak noise while driving when the exhaust brake engages. Has got progressively worse. The noise goes away when brake releases and normal conditions resume. The noise is much louder in the rear of the coach. I have a ISC 8.3. Doesn't seem to be effecting anything other than the air releasing noise. Brake still seems to operate as designed. Any thought / ideas would be appreciated.
Mike , Darlene & Rebel (yorkie) F427089
2001 Dutch Star 3858, 8.3 ISC
2015 F-150 4x4
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Old 06-03-2016, 11:16 AM   #2
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Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 24,898
Given the history of cracked exhaust manifolds on those Cummins engines , I'd say that would be the first place to check.

EDIT: If your traveling in Northern AB foothills , have you noticed any issues with fuel supply? Edmonton refinery problems have some stations running out.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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Old 06-03-2016, 11:44 AM   #3
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Join Date: Feb 2010
Posts: 53
Thanks for the exhaust manifold idea. Been camping for a week or so , last fueled about a week ago. Haven't noticed anything that stood out while traveling around in toad.
Mike , Darlene & Rebel (yorkie) F427089
2001 Dutch Star 3858, 8.3 ISC
2015 F-150 4x4
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Old 06-04-2016, 12:15 AM   #4
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Posts: 884
X2 on a cracked exhaust manifold. That is the classic symptom.
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brake, noise

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