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Author Topic: K&N air filter breather hose  (Read 4031 times)

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Bobg

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K&N air filter breather hose
« on: April 09, 2016, 09:45:43 AM »

Installing a K&N air filter on my 25xp engine, does anyone know what to do with the oil breather hose?  I have exhausted my search through the archives and can't find what others have done, do I just strap it to the filter like the old set up had?  Get a seperate can to put it in? sure I will figure something out, but curious to see what others have done when they switched to the K&N filter.  thanks
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Bob Gatz, 1988 catalina 34, Hull#818, "Ghostrider" sail lake superior Apostle Islands

Ron Hill

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Re: K&N air filter breather hose
« Reply #1 on: April 09, 2016, 12:29:43 PM »

Bob : Look in WiKi and you'll find the option of drilling/taping into the intake manifold - to attach the oil breather hose to.

 
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KWKloeber

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Re: K&N air filter breather hose
« Reply #2 on: April 09, 2016, 07:48:10 PM »

Installing a K&N air filter on my 25xp engine, does anyone know what to do with the oil breather hose?  I have exhausted my search through the archives and can't find what others have done, do I just strap it to the filter like the old set up had?  Get a seperate can to put it in? sure I will figure something out, but curious to see what others have done when they switched to the K&N filter.  thanks

Bob,

Your XP should have a knockout on the intake manifold next to the silencer throat.  if so, you can get friction-fit hose nipple for the knockout from Kubota and the OEM hose (I think it's 3/4?) fits the nipple.  I recently did this on a customer's XP on a C30.  This is the method to terminate the breather hose on some of the Kb tractors that use the XP equivalent engine.

Alternately, drill and tap the manifold or throat for an npt x hose barb (use a rag to catch filings when drilling.)

Or KN makes an adapter that fits the filter (between top and bottom plates) and a hose attaches to (not sure what hose diameters it is available in.

Cheers,
Ken
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KWKloeber

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Re: K&N air filter breather hose
« Reply #3 on: April 09, 2016, 07:56:05 PM »

See pic of breather hose attached at manifold.

kk

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Noah

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Re: K&N air filter breather hose
« Reply #4 on: April 09, 2016, 08:09:11 PM »

Ron- where in Wiki?
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Stu Jackson

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Re: K&N air filter breather hose
« Reply #5 on: April 10, 2016, 09:59:47 AM »

Teck wiki, Engines, Misc. Projects:

    Options to Route Crankcase Breather Hose to Air Intake VIEW THE PDF

    Remote Oil Filter Details from Maine Sail: http://www.sailnet.com/forums/engines/230865-remote-oil-filter-kubota-diesel.html#post3224841

You'll have to actually go to the wiki to cliock the link on the first one, but I don't think it has that info that Ron mentioned.  There are many K&N discussions on the forum, one with pictures of Rick Allen's setup he did last year.
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KWKloeber

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Re: K&N air filter breather hose
« Reply #6 on: April 10, 2016, 10:14:47 AM »

Here's the link to the TW PDF

http://c34.org/wiki/images/1/13/Example.pdf

Here's the KN adapter in use





kk
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Noah

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Re: K&N air filter breather hose
« Reply #7 on: April 10, 2016, 12:51:57 PM »

What is the advantage of thr KN over standard OEM can assembly?
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Ken Juul

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Re: K&N air filter breather hose
« Reply #8 on: April 10, 2016, 02:03:52 PM »

I don't think there is any difference in what filter you use.  Most boats are not used in dusty environments, it is more noise silencer than a filter.  I just cut foam rubber to the proper size, whip stitch the ends together and use it until in gets dirty.  Toss it and make a new one.  I added a 90 degree hose barb to the top of the oem filter and run the breather to that.
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Noah

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Re: K&N air filter breather hose
« Reply #9 on: April 10, 2016, 02:56:25 PM »

Yeah, my plan too. Does anyone have a pic of where the breather hose comes off the engine?
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Ken Juul

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Re: K&N air filter breather hose
« Reply #10 on: April 11, 2016, 06:46:31 AM »

it is attached to the valve cover
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Rick Allen

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Re: K&N air filter breather hose
« Reply #11 on: April 11, 2016, 02:32:53 PM »

Bob, this my setup..
« Last Edit: April 11, 2016, 07:27:21 PM by Stu Jackson »
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Ekutney

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Re: K&N air filter breather hose
« Reply #12 on: November 21, 2016, 03:29:44 PM »

a pic of my installation, it was straight forward with the vast amount of info on this site.
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KWKloeber

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Re: K&N air filter breather hose
« Reply #13 on: November 21, 2016, 03:34:32 PM »

Yaaaaaayyyy   :clap :clap

a pic of my installation, it was straight forward with the vast amount of info on this site.
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mainesail

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Re: K&N air filter breather hose
« Reply #14 on: November 22, 2016, 06:43:27 AM »

Please remember that we are on sailboats that heel when motor sailing. In order to avoid a run-away diesel or excess carbon, it's a good idea to put a "trap" in the PCV line before it hits the manifold or air filter. Even a cheap in-line filter for an air compressor will work to capture any oil before it gets to the manifold. These are often called "oil/air separators" or "oil catch cans".
« Last Edit: November 22, 2016, 06:49:03 AM by mainesail »
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