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Old 13-01-2018
Titch101  Titch101 is offline
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Default Exhaust soot and rattle

I have a 2014 Wk2 Diesel laredo and have noticed lately a rattle from both mufflers on startup, sounds like they both have rocks in them.
I also have a lot of soot around the exhaust tips and even up on the lower plastic part of the bumper. Any other owners experience this or do i have some exhaust issues?? I was considering running some cleaning additive in my next fill up if anyone can recommend something suitable?? (yes i know some people see them as snake oil but there are also plenty of people that swear by it)
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Old 13-01-2018
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Quote:
Originally Posted by Titch101 View Post
I have a 2014 Wk2 Diesel laredo and have noticed lately a rattle from both mufflers on startup, sounds like they both have rocks in them.
I also have a lot of soot around the exhaust tips and even up on the lower plastic part of the bumper. Any other owners experience this or do i have some exhaust issues?? I was considering running some cleaning additive in my next fill up if anyone can recommend something suitable?? (yes i know some people see them as snake oil but there are also plenty of people that swear by it)
I use this product every 5-10,000k on my 2013 Diesel Grand Cherokee: http://www.penriteoil.com.au/product...SAAEgKo1fD_BwE

Data sheet: http://www.penriteoil.com.au/assets/...CLEANER%20.pdf
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Old 13-01-2018
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Thanks i might give it a go.
I was also looking at this product https://costeffective.com.au/product/ftc-decarbonizer/

Looks good but a bit expensive.
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Old 13-01-2018
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Thanks i might give it a go.
I was also looking at this product https://costeffective.com.au/product/ftc-decarbonizer/

Looks good but a bit expensive.
The difference between the two products is that the Penrite product is specifically intended to address DPF issues and uses liquid bimetallic platinum & cerium catalyst.

An interesting summary of the effectiveness of this approach can be found here: http://pubs.acs.org/doi/abs/10.1021/ef900370v
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Old 14-01-2018
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If you are getting soot out of the exhaust on a GC diesel, you have a problem with the DPF. My exhausts have been totally clean from day one - you could eat off them.

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Old 14-01-2018
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That was my thoughts as well, i'm guessing the dpf is cracked or has broken apart, perhaps thats what is rattling around in my muffler??
I have been tracking the DPF % on my OBD2 reader and it is still building up and re-gening so im not sure its affecting the system much.
Of course i am just out of warranty by 4 months, not sure its worth replacing as i believe they are horrendously expensive.
I'll get my mechanic to have a look anyway, def not trusting the dealer service center to do anything.
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Old 14-01-2018
OzRick25  OzRick25 is offline
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You may have a problem with the dpf but it's unlikely to be the main problem. A blocked dpf is a sympton not a primary cause. Their are almost certainly other problems with incomplete combustion causing the soot such as over fueling injector, faulty O2 sensors, or possibly even the signs of excessively worn rings or fragmentation of the dpf or piston rings passing through to the exhaust.

If it was me I would be running a compression test and pulling the muffler to see what it is rattling.
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