What's that smell?

[cp2146]

I've noticed lately that when I have to stop (put it in park) before a regen completes, there is a strong smell of rubber burning. I know the DPF/CAT gets really hot, but is that smell normal?

[countryraised]

If a regen is stopped early and without time for the exhaust to cool down it does have a very distinct odor, not just on these trucks but others and off road equipment also.

[cp2146]

Originally Posted by countryraised

If a regen is stopped early and without time for the exhaust to cool down it does have a very distinct odor, not just on these trucks but others and off road equipment also.

Thanks. I was just worried that I was damaging something critical under there. Normally, if I do have to stop a regen early, I always try to let it idle for a couple of minutes so as to burn off the excess fuel and not dump it in the oil. I guess I need to give it more time for cool down as well. It's not gonna be an issue much longer because I'm getting ready to order the delete package. Going with the Mini Maxx tuner, Diamond Eye DPF/CAT delete pipes, and AFE Stage 2 CAI. I'll do the EGR delete later on.

[Duffie112]

Did you undercoat your truck? When I had mine done the guy got some on the dpf and all around it and it smelt like rubber burning also. Just a thought


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[cp2146]

Originally Posted by Duffie112

Did you undercoat your truck? When I had mine done the guy got some on the dpf and all around it and it smelt like rubber burning also. Just a thought


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I didn't, but I'm not the original owner. I'd have to look and see. That makes sense, though, because it's lived in some coastal climates so maybe that owner did to protect it from the salt air, etc. Good idea. Thanks.