12v cummins exhaust knocking - Dodge Cummins Diesel Forum
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post #1 of 6 (permalink) Old 02-02-2018, 06:13 PM Thread Starter
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12v cummins exhaust knocking

I have a 98 12v cummins the engine (in my opinion, but someone may hear something I donít) sounds normal, but the exhaust sounds like itís popping. Any advice?

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post #2 of 6 (permalink) Old 02-02-2018, 06:14 PM Thread Starter
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https://youtu.be/rcYc5c5cREI

Here is a video or exhaust, and engine.
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post #3 of 6 (permalink) Old 02-02-2018, 08:07 PM
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Mine sounds about the same. You sure it's not the axle dump making the popping noise?

97 cummins 4x4 nv4500
california truck
FP, boost, pyro
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post #4 of 6 (permalink) Old 02-03-2018, 02:10 AM Thread Starter
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Yeah Iím sure itís not. itís straight piped now and before the axle dump I had the exhaust coming out to the side with a muffler and it was still popping, just not as loud because of the muffler.
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post #5 of 6 (permalink) Old 02-24-2019, 03:38 PM
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What do you have for modifications to the engine/pump? Mine does the same thing 1994 with the 175hp pump
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post #6 of 6 (permalink) Old 02-24-2019, 07:50 PM
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Are your valves adjusted properly ? Are your exhaust manifold gaskets in good condition ?

1994 SCLB Auto.
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