K&N air filters
 

i have been told that you dont want to put K&N air filters on your truck because the filter will allow the oils out of the filter pass by and hurt the turbo, does any body know

I've heard the same thing. I have a K&N in my truck, because it was in here when I bought it. I also just dismantled my turbo to upgrade it and saw nothing bad at all. There was no residues or anything. I've just been lazy and haven't gotten the BHAF yet.

hey muskrat, what is this bhaf unit you are talking about? i did quite a bit of looking around for my 91 and all i came up with was k and n or an air raid. wound up purchasing the kand n.:humm:

BHAF= Big Honkin Air Filter. They are just an extra big filter that fits our air intake. They require a special home brewed mount of one sort or another. The "old smokey mount" is popular. I'll try and hook you up with more info in a moment.

i appreciate it.

Found it. Here is a thread with the part #s for our trucks and directions for the mount.

https://www.dieselbombers.com/1st-ge...7-air-box.html

thanks musk! i found my project for tomorrow.

I have K+N's in both of my trucks. Work fine for me.:pca1:

I,ve run K&N and Green HP air filters - I'm currently running a Green HP on a custom built intake to the turbo. I have not had any trouble with either one. The key is to not over oil either one.

Bob

I understand it as…

If you put to much oil on the filter some oil will pass though the filter and end up on down stream electronics. A stock filter will trap more dirt then a K&N if it’s not oiled (I have been told).

well thank you i have a K&N in my truck right now and was just wondering if i should keep it or not

Any of you guys running K&Ns ever done a used oil analysis to see how much dirt is getting through that filter?

I'm running a k&n cold air intake on my truck, and have had no problems thus far (about 70,000 miles with it on). I think if you go to k&n's site it will explain that many of the reported oil problems have been falsely diagnosed as filter oil problems. I have never had any problems and I tend to liberally apply the oil on mine. Take a look at the amount of oil inside a stock 7.3L intake and it should calm your worries about oil problems from filter oiling. I've never seen any heavy oil residue in my turbo.

Ya think! :lol88: Show me any vendor's ads, marketing material, web site, whatever that fails to sing the praises of their products. The simple fact they address the issue at all has to make you wonder.

Any effect from over-oiled filter residue would be the least of my worries. I ran a K&N on my 1st Gen for the first year or so after I got the truck, just because it was already on there. I also installed a Gulf Coast bypass filter. So the oil in that engine cannot for all practical purposes get any better filtration. The first sample after 6 months and 5,000 miles came back excellent. The second sample after a year and about 10,000 miles came back excellent as well (lower than average wear numbers), with one exception: Si (Silicon). The level by then had tripled to well above average. It just took that long to accumulate enough in the oil to come back out of spec. K&N went in the trash the next day.

well im glad to hear more than a couple of guys are running those with no problems !!! i was double guessing my first purchase for my rig.

...That they know of. It's kinda like the tree falls in the forest thing: If dirty oil is wearing out your engine twice as fast as it would otherwise, does it make a sound?

here's a little test for yall take a smidg of oil wipe it on the inside of the intake pipe right after the filter run a stock paper, bhaf paper, K&N, or whatever for a oil change interval 3000 miles for me then look at the oil spot hell just do it for a day then look see how much dirt has collected there the K&N filters (X) amount of CFM in a small package witch equals poor filtration a bhaf paper passes the same (X) amount of CFM as the K&N but its has to be twice as big to get the flow because it filters better equaling less flow per square inch there's nothing wrong with the washable/oilable filters LIKE the k&N for instance Brute force is a good one they take what was said into consideration when design

just a thought

Regarding engine oil analysis:
I've had engine oil analysis done after every 6000 mile oil change and have never had on come back that was not OK to continue to use. From day one - I bought the truck new in Jan of '93 - all measured levels of all tested areas have been consistantly excellant.

Bob

I'll post a copy of my Blackstone report for you to see for yourselves soon as I get around to it. There are lesser factors like the part of the country you live in and your usage patterns that can affect a K&N's perfomance to a significant degree. Certain areas will generate finer dust particles and there's more of it floating around heavily used highways.

Just curious Bob, where do you live, and how do you use the thruck?

NadirPoint, yeah, I do think. I've been running oil analysis on my truck for little over 70,000 now and have yet to have the silicon levels come back high enough to reach average. How long do I wait until the levels are supposed to be elevated? Use the product the way the manufacterer intended and it will perform accordingly. I was just trying to provide some information that a bomber might find helpful, that's all. If you don't like K&N, buy somehing else, still America right?:tu:

Ok, fair enough. Let's see the report(s).... Like I said, I'm going to post mine. Until then, it's all just hearsay. :w2:

Not sure were I heard this from, but, check the acidic levels in the oil, I think that is what the big problem is with using oil filters on diesels.

i run with a K&N, but i replace it ever oil change, 70 dollars is well worth it and not over oiling or having to worry about it.

You install a new K&N air filter every oil change? :s:

I have an account with one of my local suppliers, total amount on oil, filter and air filter comes to 100.00 each change, not so bad for every 4000 or 3 months

I will be updating my filter to the Peterbilt intake in the spring, just a really big paper filter.

NadirPoint

I live in Portland OR - sun from July 5th to about the middle of Oct then rain etc. until the next July 5th.

Bob

For what it's worth the K&N oil is nearly the same thing that comes in the AFE filter recharge kit. I have both. The cleaner stuff is nearly the same too.

i bought a k&n for my truck when my uncle owned it. he bought the truck in 94' and that x-mas i got him the k&n, been on the truck ever since, well i took it off once and tryed an air aid filter and ended up putting the k&n back on. I have allways used liberal ammount of oil on it and so did my uncle, i just started doing oil samples on it (only every 6 months) and everything keeps comming back in the green, so i can't say the k&n is bad. but the bhaf does interest me think i'll have to get one and try it