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Old 08-06-2008, 10:14   #1
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Air filter on Diesel?

Just wondering if anyone has put an air filter on their diesel?
My Perkins came with a perforated chicken catcher for an air filter.
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Old 08-06-2008, 10:33   #2
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Its not that they shouldnt put one on but rather that they couldnt find a reason to do so in the first place.
kinda like a ingenious solution, to a non-existing problem............
Because most motors are in an inclosed area, dust is at a minimum.
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Old 08-06-2008, 11:28   #3
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Quote:
Just wondering if anyone has put an air filter on their diesel?
My Perkins came with a perforated chicken catcher for an air filter.
Westerbeke has a circular affair with a chicken catcher on it. The idea is it reduces noise. They seem to die at 2000 hours. They want $250 for a new one. Given it still has to be modified to fit I'm going with a finer mesh that might keep the bugs out instead of things larger than a beetle.
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Old 08-06-2008, 11:32   #4
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Originally Posted by Pblais View Post
Westerbeke has a circular affair with a chicken catcher on it. The idea is it reduces noise. They seem to die at 2000 hours. They want $250 for a new one. Given it still has to be modified to fit I'm going with a finer mesh that might keep the bugs out instead of things larger than a beetle.

Do combusted beetles (and roaches - AUGH!!) cause problems with diesels?
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Old 08-06-2008, 11:47   #5
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Diesel air filters

You should take a look at S&B filters(sbfilters.com). They make a K&N type filter and elbows specifically for diesels and marine applications. They were a tremendous improvement for my Yanmar 4LHA's, and did away with the cheap foam which disintegrates used by thestock filters
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Old 08-06-2008, 12:55   #6
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Do combusted beetles (and roaches - AUGH!!) cause problems with diesels?
They don't help. Given the screen from the factory is about a 1/4 inch grid I would say that sets the limit. Seagulls and tennis balls clearly are bad.
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Old 08-06-2008, 13:08   #7
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I fitted a Walker AirSep to my 4-108 a few years back. lt helped with:

1. noise
2. engine leaks (puts a negative pressure in the crankcase)
3. cleanliness (engine room much cleaner than before)

Bill
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Old 08-06-2008, 15:14   #8
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Quote:
I fitted a Walker AirSep to my 4-108 a few years back. lt helped with:

1. noise
2. engine leaks (puts a negative pressure in the crankcase)
3. cleanliness (engine room much cleaner than before)

Bill
Hmm, that sounds slike good info as I hate noise, engine leaks and lack of cleanliness and I have a 4-108.

Did you notice any change in power, fuel consumption or more black smoke..?

Could you forward more details on the filter, perhaps pics as well?

Beer be on me...
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Old 08-06-2008, 16:12   #9
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One my Pathfinder diesel there is an air cleaner housing with filter, that can be cleaned and re-oilled. The cleaner filter is pretty dense material inside of a mesh covering, and it's made to be cleaned and used over and over again. I've cleaned it once, and oiled it, using the recommended cleaner/oil kit.
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Old 08-06-2008, 16:57   #10
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CSYman,

Not much more to tell: it seems to work as advertised. I've not noticed any better fuel mileage, and I don't have a black smoke problem in normal operation.

Here's a pic of the unit installed on my 4-108: Gallery :: Miscellaneous 2007 :: AirSep_0135

And here is some more info from the folks I bought it from:
Tech Tip #20 - Tech Tips - Shop Kinks & Tech Tips

Basically, it just sits there and does its job.

Only downside is the need to remove a hose fitting from the dipstick in order to get a correct reading of oil level. This just takes a few seconds and, I suppose, one could get a longer dipstick.

Bill
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Old 08-06-2008, 17:13   #11
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Originally Posted by btrayfors View Post

And here is some more info from the folks I bought it from:
Tech Tip #20 - Tech Tips - Shop Kinks & Tech Tips

Looks like a good setup.
The tech tips had this;
When used in conjunction with an exhaust purifier Foley can significantly reduce the eye irritation and odors associated with running an engine in a confined area.
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Old 16-06-2008, 20:09   #12
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Hello everyone.
For the benefit of all I put the following on my Yanmar 2GM20.
I cut to fit a piece of reusable furnace filter material, then wrapped this on the outside of the cage in the air intake silencer securing it with a small piece of velcro.
Works a treat.
Also I can not stress the importance of good filtering systems on an engine.
I also use a Perko water strainer and a large Racor fuel filter/water separator.
My diesel is very happy and reliable.
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Old 17-06-2008, 08:13   #13
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I have a 4-108, I used a K&N filter and an appropriate piece of pipe to replace the bug catcher that came on the engine. I raised the filter high enough to clear all obstructions since it is much larger in diameter than the original dome (I used an off set filter to place it over the valve cover) and then drilled and tapped the pipe for the vent line (just like the original). Cuts down on noise and even though it may not be a dusty enviroment I like the fact that the engine is now getting "clean" air along with clean fuel. Got it all from the local auto parts store. Not as cool as the airsep but lots cheaper.
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Old 18-06-2008, 13:24   #14
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air filter question for SV New Sensation

SV New Sensation,
As a lot of us have 4-108's could you post the part number of the K & N filter you used? I could probally figure it out but our boat is in Mexico and we are back in California. Did you use a metal or rubber hose type extension ?
Thanks in advance
Mike
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Old 18-06-2008, 19:51   #15
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There is a lot of information on this site some of it quite misinformed. Air filtration may not be necessary to run your motor nor is clean proper viscosity oil- but it sure helps the motor run better and longer. You wont see any 100,000$ plus big power boat motors without a major air filtration
sx
. because a boat is a sail boat that should not excuse the owner from getting a little
moreknowledgeable
and familiar with the iron sail-maybe there will be less hard luck stories about how the motor fails at an inappropriate time?
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