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Def crystallization on the bottom of the DPF, Chunks as big…

Def crystallization on the...

Def crystallization on the bottom of the DPF, Chunks as big as my fist broke off.

Mechanic's Assistant: What's the make/model/year of your truck? Engine type?

2016 Volvo VNL 780, D13 Engine.

Mechanic's Assistant: Are you fixing your truck yourself? What have you tried so far?

Nothing, needing advice

Mechanic's Assistant: Is there anything else the Truck Mechanic should know before I connect you? Rest assured that they'll be able to help you.

Possibly 2-3 weeks old

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Answered in 30 minutes by:
4/8/2021
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 1 year ago
Mike Mcmillan
Mike Mcmillan, Shop Foreman/Triage Tech
Category: Medium and Heavy Trucks
Satisfied Customers: 6,763
Experience: Volvo/Mack Master Tech, Certified with Cummins, Eaton, GM, Hino, Detroit Diesel
Verified

Hello and thank you for using Just Answer. My name is ***** ***** I’d like to try and help. Usually there are one of 3 causes of this. One being the def doser mounting gasket leaking. The other is the tip leaking and third is a biased nox sensor reading causing it to over dose   I hope this helps you with your question.

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Customer reply replied 1 year ago
the fact the engine has been throwing NOx codes for a while means it is probably the last option?
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 1 year ago

It is very possible yes

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Customer reply replied 1 year ago
Last question: How bad is it if it is dripping onto the ground after running for 60 miles? Is this a, "Get it into a shop immediately" issue?
Technician: Mike Mcmillan, Shop Foreman/Triage Tech replied 1 year ago

I would get it addressed. It can plug the scr cat

Mike Mcmillan
Mike Mcmillan, Shop Foreman/Triage Tech
Category: Medium and Heavy Trucks
Satisfied Customers: 6,763
Experience: Volvo/Mack Master Tech, Certified with Cummins, Eaton, GM, Hino, Detroit Diesel
Verified
Mike Mcmillan and 87 other Medium and Heavy Trucks Specialists are ready to help you
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Customer reply replied 1 year ago
That's what I thought. Thank you so very much. I will end this now and rate.
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Mike Mcmillan
Mike Mcmillan
Mike Mcmillan, Shop Foreman/Triage Tech
Category: Medium and Heavy Trucks
Satisfied Customers: 6,763
6,763 Satisfied Customers
Experience: Volvo/Mack Master Tech, Certified with Cummins, Eaton, GM, Hino, Detroit Diesel

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