Duramax Diesels Forum Truck of the Week
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Old 01-09-2020, 06:42 PM
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Default Cleaning the DPF Filter

Is there any proven way to clean a DPF filter with water or any chemical solution? I have the exhaust off the truck, completely intact and it was off a long bed, so I can't exactly get right to the face of the DPF easily.

It's performance was diminishing (frequent regens) and before it goes back under the truck I would like to give it any help if possible.
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Old 01-09-2020, 07:34 PM
Jacy_dzlguy Jacy_dzlguy is offline
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Never done a vehicle one but on my equipment I take it into a business that cleans dpfs. Probably not a lot you can do yourself. And they may have to cut it and weld it back in.
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Old 01-09-2020, 09:40 PM
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I washed mine. Wasn't too hard. I ran the hose backwards to flush a majority out. Then caped it and filled it with powdered laundry detergent and water. Let it soak for a while and rinsed it. Did this a few times and put it back on. A pressure washer would probably make it a little easier but as you mentioned there is no direct view of the filter so maybe not

Took a while to boil all the water out. Seemed to have a bit more back pressure when it was wet but cleared up after it dried out. Then I used EFILive to run a regen.

I did this because I bought it used. It looked like someone removed it because it clogged up. Worked fine afterwards and was able to pass smog

PS: this is on an LMM and not an LML
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Old 01-10-2020, 10:21 AM
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There are companies that will clean it correctly. Needs to be cut open and put thru the correct process of cleaning to make it worth it. SoCal has tons of places down there that provide this service, most big rig repair shops will have the capability of making this happen.
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Old 01-10-2020, 01:01 PM
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I cleaned mine by removing it and placing it on a pallet in the back of the shop where it will live forever
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Old 01-13-2020, 09:01 PM
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Hot water from the water heater and dawn seemed to wash it out pretty good. It completed a successful regen and seems to be performing better. 40 miles and it's only up to 7 grams of soot.

It won't be on too long, really just enough to get through the "greta" test. So long term who knows, but should be good enough for my purpose.
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