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Stains on DOC filter

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Waraichsaab, Oct 16, 2024.

Oct 16, 2024 #1
Waraichsaab Bobtail Member

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Oct 16, 2024

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Was changing DPF filter on my 2018 cascadia DD15…..saw some stains on the DOC filter
Already checked for coolant and it’s not that
I replaced all 6 injector as well
What could it be ?
Is it engine oil because I noticed engine oil is low
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Waraichsaab, Oct 16, 2024

Waraichsaab, Oct 16, 2024

#1
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Oct 16, 2024 #2

Nss Light Load Member

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Do you run fuel additives, they will stain doc inlet kind of reddish/brown color

Nss, Oct 16, 2024

Nss, Oct 16, 2024

#2
Oct 16, 2024 #3

Waraichsaab Bobtail Member

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Oct 16, 2024

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Nss said: ↑

Do you run fuel additives, they will stain doc inlet kind of reddish/brown color
Click to expand...

No I don’t

Waraichsaab, Oct 16, 2024

Waraichsaab, Oct 16, 2024

#3

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