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Old 12-13-2011, 04:34 PM
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Hydrophobic air filters

Okay, I know this topic has been beaten to death(see below thread), but after a couple of days of researching I still don't seem to have an answer.
I am about to do a "Tymar" style DIY intake and filter. From what I have read, it seems that none of the Napa 6637 or cross reference parts(brand"x") for that filter are actually water resistant.
I would like to know if anyone running these types of filters actually has had a problem with water. It seems that the Tymar setup comes with a Donaldson B085011 filter which is claimed to be hydrophobic. Or I read the Baldwin PA2818 is also hydrophobic. I talked with a supplier today who said that neither of these are hydrophobic or different from the other brand equivalents.
He said I needed a Baldwin PA3867 or a Donaldson B085046. I found these filters for $63 shipped, but I can get the Fram version of the Baldwin PA2818(non hydrophobic?) for $19.62 locally at Freightliner.

I live in the Northeast where we sometimes have snow on the ground 8 months of the year. Anyone have any experience with the different filters?

Thanks.
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Old 12-13-2011, 04:39 PM
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We get lots of rain here in so cal, 4 weeks at a time, and been raining last 2 days, happy to report my cheap savy pays off and my $20 fram ca8037 bright Orange filter has zero issues above my fenderwell in my knock off of the diy knock off of the tymar intake.
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Old 12-13-2011, 07:30 PM
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This is the one I installed and it is supposed to by hydrophobic:

Donaldson B085011 Air Filter Also Replaces CUMMINS 2912986,HERCULES B085008 & 400000642

I also bought it from this company........fast shipping......I couldn't have been happier!
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Old 12-13-2011, 07:47 PM
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Yeah, according to the supplier I spoke with that is the same as the Napa 6637 or Baldwin PA2818. Not hydrophobic. He could be wrong...How long have you been running this setup?
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Old 12-13-2011, 08:29 PM
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according to donaldson, the B085011 is ideal for marine applications.......they dont call it hydrophobic though......
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Old 12-13-2011, 09:50 PM
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Quote:
Originally Posted by blue94 View Post
Yeah, according to the supplier I spoke with that is the same as the Napa 6637 or Baldwin PA2818. Not hydrophobic. He could be wrong...How long have you been running this setup?
Just a couple of months with no problems at all. Somewhere on here, I found a thread that gave this part number as the filter used in the TYMAR setup and as being hydrophobic.

If you read down this page a ways..........

Tymar intake

you'll see that Cary from CT Performance states that the 085011 Donaldson Filter is hydrophobic.

Last edited by hutchman; 12-13-2011 at 10:00 PM.
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Old 12-14-2011, 04:42 AM
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Thats where I'm confused...I'm not trying to throw a wrench into things but this supplier (Filters Pro in Tuscon)told me that the hydrophobic marine filter from donaldson is the B085046 and that the B085011 is not made with hydrophobic filter media...
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Old 12-14-2011, 06:17 AM
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As long as you dont splash Large amounts of water over the hood, dont be worried about soaking the filter.

Ihave soaked mine offroad a couple times, but I was going through some seriously deep water and swamps.
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Old 12-14-2011, 07:15 AM
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Quote:
Originally Posted by Nitro41 View Post
Ihave soaked mine offroad a couple times, but I was going through some seriously deep water and swamps.
At those depths, the PCM and IDM are waaay bigger concerns than the air filter.
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