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Old 07-03-2009, 10:31 AM   #1
Join Date: Apr 2009
Posts: 85
water @ air filter

Has anyone of you experienced and seen water @ the bottom area of the air filter enclosure/casing where you install your air filter element. I noticed this scenario twice on my 08 cayman. This is strange for me. Do somebody knows if this water gets to my intake manifold, will this corrode some internal parts of my engine?. It seems to me that air intake port/upper/left corner of the rear end of the unit is a bad design of monaco. I already drilled three holes as drain hole c/t casing mentioned above. Any other opinion out there will be highly appreciated.

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Old 07-03-2009, 12:26 PM   #2
"Formerly Diplomat Don"
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Newmar Owners Club
Join Date: Apr 2005
Location: Moorpark, Ca.
Posts: 10,956
MARANATHA......I've never seen water in mine, but I haven't really checked for it. The location of the air pick-up is actually in a good spot. It's picking up cool fresh air. If you look at other brands, most of them draw their air from the same place. I went out to look at mine to see if there is a scupper valve of some type at the low end of the hose, but there isn't. My hose runs down the back wall of the cap, makes a drooping loop into the air filter cartridge. I guess if I ever had water, it would have been in that droop.

Your air filter will filter out the water unless it's being overwhelmed. It's paper and will only absorp the water and dry fairly quickly because of the heat and air flow across it.

Something else you should think about. You said you've checked the filter and found water a couple of times. How often are you checking the filter and are you removing it to do so? The reason I ask is that you can do more damage by removing the filter and putting the old one back in then you will do by getting a little water in it.

In the old days and especially on my cars, I would pull out the air filter, bang it on the ground, look through it in the sunlight and put it back if it was still good. I later learned that this is a big NO NO with diesels. Vary small particles of dirt can clog the high pressure injectors on the diesel engines. The only time the filter should be removed is when it's being replaced with a new one. I take mine out and carefully wipe the housing with a damp cloth and install a new one.

I always want mine to run better and get better mileage and feel that the air cleaner will have a big impact on that, but it really doesn't. These coaches and air filters are designed to run at least three years under normal conditions without replacement. You can also monitor the air filter by the gauge in the rear compartment. It should be checked regularly toward the end of the filters life span. On really hard pulls up a grade, reset it and then check it again after normal driving. When it gets near the red, replace the filter.

I'm really ANAL and I change all my filters once a year. It's cheaper for me because I do it myself, but I wouldn't recommend it for everyone.
Don & Mary
2019 Newmar Dutch Star 4018 - On Order
2016 GMC Canyon 4WD Crew Cab
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