Dorman 904-418 CCV Filter Teardown

[Tomioka]

This is the crankcase ventilation filter for a Cummins ISB 6.7L diesel engine that is located at the top of the valve cover. Changed it to a Fleetguard filter once stock became plentiful.

Top of filter (Clean side):

Bottom of filter (dirty side):
I've begun prying on the bottom side to expose the filter.

Bottom removed from top exposing the felt material used to absorb the oil mist from engine blowby gasses:

The bottom appears to be a separating catch-can type unit:

Pieces of the unit layered together:

 

[NashNative]

We've actually done extensive testing of those Dorman copy-cat CV units and they tend to have some serious problems. The media that they use is known to melt/deteriorate inside the plastic housing, just a heads up:

 

[tnt_motorsports]

I use nothing but Fleetguard on my 6.7L Ram Cummins. They work so much better and can be found rather inexpensively on Amazon.

Just my $0.02

 

[Tomioka]

There was a brief shortage on Fleetguard CCV's in the beginning of 2022 so the Dorman were the only option available. Once our shop started getting them in I swapped it out when I was able to service the truck.

 

[NashNative]

There was a brief shortage on Fleetguard CCV's in the beginning of 2022 so the Dorman were the only option available. Once our shop started getting them in I swapped it out when I was able to service the truck.

Totally understand! It has been a tough last couple of years in the supply chain world. If you're ever struggling to get the Fleetguard parts you need, please reach out.

 

[BrianF]

Thanks for sharing. I recall on another site someone was using those Dorman filters with no issues.

I had looked at them but of course, in Canada, everything costs more than the original. Same with looking at with fuel filters. Could not find the beta ratios and they cost more than Fleetguard.