Engine/Transmission (1998.5 - 2002) Why I said "To Hell with the K&N"

[DuallRam]

Where do you get a BHAF? Is that what you ask for? I have read in some posts that some have a rigid flange and some dont.

 

[bmoeller]

BHAF Part numbers:

Fleetgaurd# AH19037

Wix # 42790

Napa # 2790

Carquest # 87790

Donaldson # B15006

Baldwin # PA2820

John Deere# PMAH19037

 

[RowJ]

B.M.

That Fleetguard # (AH19037) is not listed in Fleetguard's Web Catalog?? Right #?

Anyone have # and picture of Marine model?

 

[Gary - K7GLD]

I don't have a picture, but it is a bit smaller than the "standard" BHAF, and Fleetguard part # is:



AH19002

 

[RowJ]

Thanks Gary! Found picture in their catalog section.



BM - Also found the AH19037 - picture & dimensions.



These were not listed in web page literature but catalog search brought them right up? Guess it helps to know where to look!

 

[StakeMan]

Just a thought.....



Could the use of 2 pre-filters have caused enough of an increase in vacume thru the filter to cause the dirt to be pulled thru.

 

[Muleskinner]

Originally posted by Chipstien

The thing I don't understand is that the guys with twins are running K&Ns that are much smaller in terms of surface area then the 0880. They have to because of where the filter is located way down off the secondary turbo. Can't use a filter that is as long as the 0880... ... . I think.



What kind of an air filter do you have posted here? Brand, model#, where it can be purchased, Etc.







Yes, they are the pre-filters. The red foam one is a K&N Airforce Pre-Cleaner. The black one is the K&N Pre-charger. Both are designed for use in dusty conditions. Even though I am not in dusty conditions I figured that the pre-filters could only help. Go here http://www.knfilters.com/wraps.htm and here http://www.knfilters.com/airforcewraps.htm to read more on the pre-filters. Odds are very good that they make it for your particular filter.







Just so happens that I do... ... .



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[Big White Beast]

Froadin,

Your worries about the underhood temps aren't all they're cracked up to be. The only time the temps build near the filter are at a stop. Once moving even a little they drop rapidly to just a little over ambient.



This was with a remote temp probe tied to the BHAF near the turbo. Someone else, can't remember who also had a remote probe in their intake horn (more guts than me) and reported similar findings. The intercooler works fine at dropping temps.



As far as K&N's go, Gary has my original one in his truck. I only had it a few miles and noticed some oil building on the hose to the turbo and gave up. Not a bad filter for certain uses though, I have one in my Durango which goes to the desert a lot. The air consumption is way less than the Truck and I feel a lot more comfortable with it.



Garrett

 

[merryman]

I have only been running K&N since 1984, several hundred K miles.

Everytime I see one of these post, I can't resist checking AGAIN to see if I can find any dirt, oil, etc in my hose or turbo; nope allways clean as as the proverbial whistle.

At least once each summer, I spend a couple weeks in the Eastern Oregon desert running around on roads where you leave a rooster tail of dust where ever you go. Still no dust past the K&N

How others get these poor results allways leaves me scratching my head.



Vaughn

 

[Froadin]

Big White Beast, yeah, but heat soak is still heat soak. Shouldn't be any real big deal though if you really think about it.



I have been monitoring my K&N that I have had in my truck for a while now, and while running it in stock form, it worked just fine. Dusty places, wet places, etc. Clean as I could want. I added rv275 injectors, and all was still well. But after I got the boost fooler and elbow, I started noticing a very little amount of 'haze' on the turbo. Then after adding the VA box, I noticed even more dirt showing up. So I went and got a filter about 1" smaller in diameter then the standard BHAF last night.

I believe the K&N to be just fine on stock trucks. But once you start building more boost, you can really find hte limits of this type of filter. I have had great success with them on other gasser motors, and it worked just fine on my CTD while it was stock. But I will not run one again on a CTD, no doubt there.

 

[JR2]

I ran an RE0880 for a while, no dust in the hose or oil on the turbo but my oil analysis showed more silicon in the oil sample. I switched to a BHAF and I now have very low Si numbers on my oil analysis sheets. Just because you don't have dust in your hose does not mean you don't have silicone in your oil.



I too wonder about the twin turbo guys and the small filters they have to run. I helped install a set of twins a while back and I would not run the filter we used on his truck in mine, its too small. Maybe they just have to give up on filtering for performance sake.

 

[Gary - K7GLD]

"Maybe they just have to give up on filtering for performance sake. "



BINGO, jackpot!

 

[motohead84]

WOW is all i have to say. I never would think you would have that much dust in your intake with those pre-filters. I have the FIPK II in mine, and have never had dust in the intake. I live in Utah with its four season climate. And I have had no problems with it. I do clean it every few thousand mile when I do oil changes, but After seeing yours, I think I might make the switch to the same setup you are running.



thank for bringing a possible kn problem to my attention.



andrew

 

[JLEONARD]

I plan on using the Fleetguard Marine - a bit smaller, and waterproof filter element,

Do you have a part number for this filter?

I ask because I have a 6bta 270 hp marine engine in my boat (see signature) ... . it came with a Fleetguard AH1141 filter... smaller in od than the BHAF but longer... . so it's approx the same filter area. This filter is not waterproof and the structure is the same as the BHAF.

Just curious. .

I switched to a S&B filter for the marine engine..... similar in construction to a K&N... but much deeper pleats and way stronger built... nice unit and cleanable/dryable in case of a "water event" in the bilge.

Jay

 

[Gary - K7GLD]

The Fleetguard part # for the marine BHAF was posted above, but here it is again...



AH19002





Yer welcome...

 

[Diesel Gunner]

I have been running the Fleetgaurd Bhaf for two years. Every time that I have taken the inlet tube off to inspect, everything is clean and dry. It even gets a bit wet when I wash down the engine and no problems. When I installed it, I drilled a 3/4" hole in the end of it and installed the factory Filter Minder for what it is worth.



I am also using the SS Mallory Mount to shield it from the turbo. I can find no signs of heat on the filter and find it hard to believe that inlet heating could be much of a factor. I mean, when that sucker is running, there is a ton of air being moved through the engine compartment by the fan even when the fan clutch isn't engaged.



Had a K&N for about a month in the stock air box. After I saw the Bhaf, I gave the K&N away. I drive in extremely dusty conditions in the summer and did not trust the K&N. I believe that those of you mentioning increased boost pressures (read increased mass air flow) are right on the money. A larger filter (physical size wise) does not encounter the same pressure differential and is not subjected to the same stresses as the smaller units. Once a filter begins to change dimensionally, due to stresses being applied by differential pressure, it cannot maintain integrity and will begin to pass dirt. Be that through the filter media itself or through the seal areas it can no longer be considered a filter. Rather, it becomes an obstruction. So, now the performance enhancer becomes a performance destroyer.



K&N I am sure is a good product. How it is applied is important and should be carefully considered when selecting one for your truck. Considering that the Bhaf was designed for heavier duty applications, it is my personal opinion that it is a very good choice for our trucks. Only problem is, when you got twins, where can you put it?

 

[Gary - K7GLD]

I don't know of any available K&N that will properly provide enough airflow for a decently modded Cummins - wonder if K&N makes a BHAF-sized filter?



In any event, the Marine Fleetguard seemingly addresses all the major issues of air filtering - resistance to moisture in a somewhat compromised location, excellent airflow, and excellent filtration percentages - looks like a winner to me!

 

[Chipstien]

Originally posted by StakeMan

Just a thought.....



Could the use of 2 pre-filters have caused enough of an increase in vacume thru the filter to cause the dirt to be pulled thru.

That is a very valid question. Unfortunately I do not have a answer. However, if I do run another gauze filter... AFE, not K&N, I will only run one pre-filter. Only reason I ran both is because I got one for free because of a screw up at the parts house.

 

[Muleskinner]

Fleetguard won't sell

I called Fleetguard to purchase an AH19002 or a AH19037 and they won't sell to private parties. Where are you folks purchasing these filters??? The closest Cummins store to me is 60 miles away. Is there a company that will sell to private parties at a good (non dealer inflated) price and ship??

 

[Chipstien]

I am running the Napa filter. Should be a NAPA somewhere near by.