so there are a few videos on youtube about cleaning the DPF. a few use a pressure washer and in all the cases they are pressure washing using the normal exhaust flow direction. there is something coming out which looks like rust colored mud water....but what I was wondering....wouldnt it be better to pressure wash it reverse of exhause flow......assumption that there are carbon bits jammed in the honey combs and power washing it using a reverse flow in my mind would loosen some of them up.

also saw a can of pressurized cleaning spray that get shot into one of the bungs after removing a sensor.

and then there's those kits that look like pressurised bug sprayers you send up the exhaust.

what about dropping it into an ultrasonic cleaninig tank?

 

I blew the ash out of mine with my shop compressor and a blow gun a while ago. Here's about half of what came out at 30K miles. I'm sure there's probably more lodged inside, but I have not tried pressure washing it with water like I've seen some do on u-tube. I'm tempted to take my shop vac and suck/blow it out the next time I do it.

I'm not sure cleaning sprays, etc will do anything, expecially dissolving ash. If anything, I'd think it would all pool up down on the bottom of the DPF housing which doesn't do any good.

 

Help me understand Diesel speak....What does DPF stand for?

 

DPF=diesel particulate filter. Essentially, it is an exhaust filter. Keep that smoke from coming out the back.

I would be with the theory of "back washing" it if I were to wash it with pressure washer.

 

Actual DPF cleaning involves baking it for ~12hrs at extreme temperatures, then cleaning off the dust that is left. It is a ceramic brick, so no matter what method is used be gentle with it. Mechanical cleaning will damage it.