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This may be a problem and it may not but I would encourage you to pull your turbo inlet duct off and check to make sure everything is ok. I managed to bark my turbo for the first time today :eek: (that's a whole other story) and I yanked my inlet hose to check out the play. First thing I noticed is there seems to be alot of black dust residue on the turbine blades. Hmmm, I take a look down the inlet snorkle and there's quite a bit of white residue in there but that could be grease residue from when I had @#%^ with the grease seal on the k&n filter for the stock box. I took my inlet snorkle completly off and cleaned it thoroughly with B-12 and paper towels. While I had it off, I ran my finger around the inside lip where the BHAF snout sticks out and there seemed to be a little bit of dust there. I have had the filter in for a year but I do mostly highway driving and it actually still looks quite good. Also, I am using the pvc pipe stiffener and when I inspected the inside of the pvc pipe, instead of being perfectly smooth it has some patches that look pitted yet are smooth, almost polished looking. I don't think this is looking good. Ya'll might want to do a closer inspection and see what you see. I'm starting to wish I hadn't put the AFE filter that I won at Muncie in my wife's Ram :(



possibly sucking dirt dan
 
Well, dirt suckin' Dan,



I just checked mine, and it is spotless, maybee it's a 12-valve thing. :p ;) :D BTW I have about 15,000 miles on the filter.





Later, Rob
 
Last oil analysis was a-o-k.



Rob, 15,000 miles?! Is that all? What, are you afraid you're lift pump will go out if you put more miles on it? :p :p



Seriously guys, like I said at first, it may be nothing. I know a certian amount of residue on the turbine blades is normal and the white dusty residue on the inlet duct may have been left over from my evil k&n filter.
 
According to the Cummins dealer where I bought my BHAF, it is approved for this engine in other applications. At least the Fleetguard is - can't speak for any others.



Might be worth checking how it is sealed to the inlet duct, though.
 
I replaced the air filter on my buddies 95 12V. The filter prob. had 40k miles on it and his turbo blades had some black stuff on there. Never had a K&N in it. I think some dirty will always get through, no matter what brand filter you run. All my analysis have come back way low on the silicone side so I'm not worried.



It might just be the turbo hose oxidizing. Just a thought.
 
DSD ( dirt sucking dan) ;) , just kidding, bud... I recently had my snorkel off for a oil change, after 3,000 miles of useage with the BHAF ( and PVC coupler). The turbo blades were as clean as ever. I pulled a sample when I was changing the oil and it came back 4 PPM for the silicon, insoluables were 0. 4. This is slightly down from my last 3,000 mile analysis using the K+N RE0880, which came back 6 PPM for the silicon, the insoluables were the same, 0. 4. I don't know how much this helps ya, hope you get it worked out.



Scott W.
 
Just a thought. Wonder if the dust you guys are seeing is from the tube expanding and contracting with boost and abrading with the filter. Black dust from tube to filter contact, white from a pvc ring. I have a piece of aluminum pipe for my stiffener and everything is spotless after 25k.
 
Big Saint, 3,000 miles? You guys got to drive more ;) Even though it looks like it ought to go longer I think I'll go ahead and put a fresh one in (it does have about 30,000 miles on it) and just keep an eye on it.
 
I Try, dirt suckin Dan ( sorry bud, I think that one stuck if I ever find the time to get back to the TDR chat room) but I try my best to put more miles on Baby Huey, the wife refuses to drive in the truck unless she absolutley has too, due to the stackasorous :rolleyes: . As long as my girls still think it's cool, doesn't bother me and she'll have no choice once we get the 5th wheel :D .



As always, I believe that Bill might have come up with the cure. How much boost are you making on a regular basis ? I see around 45 psi's max, normal day to day driving I try to keep it below 30 psi's.



Scott W.
 
I run a NAPA 2790 and it does not require a PVC coupler.



I remove mine to change the oil filter and so far the turbo blades have been clean as a whistle.
 
Re: BHAF

Originally posted by dezeldog

What are you guys using for that " PVC coupler" ?? TIA Jim



Some of us felt the need to add a stiffner inside the collar of the air filter. I used a 3" piece of schedule 40 pvc (4" coupler). I'm not 100% sure it is needed, but it seemed like cheap insurance to me.



Scott W.
 
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