My 2018 Colorado [4cyl 6-speed Manual Transmission] is 3 yrs old [purchased new 7- 2018] I went to change the cabin filter. Filter was fairly dirty, but when I was inspecting it, I noticed the "clean side" was dirty! I have changed many engine filters ,and worked for a company in the 70's that made filters. Air,Natural gas, water etc. I have never seen dirt on the 'Clean side' unless there was a poor fit ,or damaged airbox. There were no cuts or holes in the pleats. The filter was fit fine in housing .Anybody heard of this? I will soon be posting My thoughts after 3 yrs of ownership in the General Discussion section.
Question about cabin air filter
The Truck
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Surprised how much more stuff (dirt & pollen) is in the cabin filter vs the engine air filter. I change both much more often than the owners manual service interval indicates. Most recently used the Bosch HEPA cabin filter. We do have a lot of pollen around here, but given relative flow volumes, and the fact we park in a garage I don't quite get why there is so much more stuff in the cabin filter vs engine air filter at the same ~10k miles interval.
Regarding clean vs dirty side, my clean side is "clean" on a used cabin filter.
Regarding clean vs dirty side, my clean side is "clean" on a used cabin filter.
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