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Exhaust White Smoke

Old 06-13-2013, 04:30 AM
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Default Exhaust White Smoke

Hi everyone,

Wondering if you can help... I bought a 2012 Jeep Grand Cherokee and exported it to Zambia. I have been informed that due to the nature of the diesel here the car tends to burn off excess sediments etc... Therefore creating a pool of white smoke from the exhaust.

My question is, is there a way of manually triggering this? As it conveniently happens when I'm in traffic and keep getting funny looks from my fellow drivers.

PLEASE HELP...
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Old 06-18-2013, 10:10 AM
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you have a brand new jeep...there should be NO smoke.

quick google search revealed this:

"White smoke occurs when raw diesel comes through the exhaust completely intact and unburned. Some causes of this include
•Faulty or damaged injectors
•Incorrect injection timing (could be a worn timing gear or damaged crankshaft keyway).
•Low cylinder compression (eg caused by leaking or broken valves, piston ring sticking, cylinder and/or ring wear, or cylinder glaze)

When white smoke occurs at cold start, and then disappears as the engine warms up, the most common causes are fouling deposits around piston rings and/or cylinder glazing.

Water entering combustion spaces will also create white smoke. Faulty head gaskets and cracked cylinder heads or blocks are a common cause of water entry, and are often to blame. Unfortunately, expensive mechanical repair is the only proper solution here."

gasoline in a diesel motor also makes white smoke...
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Old 06-18-2013, 04:22 PM
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Sounds like your vehicle is doing the regular DPF cleaning cycle. Not knowing exactly what's in Zambia's diesel, I'm going to guess that it's not the ULSD that the engine requires and you're undergoing this process regularly. This can happen a lot with stop-and-go driving where the emissions system doesn't get very hot.

"Regeneration" of the Diesel Particulate Filter basically uses extra fuel and attempts to burn off all of the soot that's been trapped in the unit. You can basically manually clean it out by going for a longer drive at high speed. A couple of trucks I've driven with the DPF system recommend > 60 KM/H for 20 minutes or something along those lines.
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Old 06-18-2013, 05:23 PM
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right^^^ forgot about dpf. i'll see the white smoke once in a while on our 6.4L ford...
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Old 06-19-2013, 10:29 AM
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Default Particulating filter ?

Hope you don't mind me jumping on the end of this thread, what year did the 3.0 CRD start using the particulating filter. I am thinking of buying a 2006-2007 Mercedes powered engine. I don't like the filters on modern engines as I do not do enough miles. When they go wrong $$$$$$$'s

Many thanks Colin
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Old 06-19-2013, 11:31 AM
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AFAIK the 3.0L Mercedes engines in 2007 had their BlueTec SCR system. I'm not really sure if the 2006-2007 Liberties with the VM Motori 2.8L have a DPF
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