K&N Air Filter Question

[shangapol]

Yesterday I Bought the K&N Air Filter for my 2007 Yaris Sedan. But I don't know how to install the filter. Exist a special way to install them?? Please Help me with this. Thanks:iono::thumbsup:

[cali yaris]

Remove the top of your airbox, remove the old filter, drop in the K&N, put the top back on.

Pretty sure it only drops in one way.
There may be arrows on the side of the filter indicating proper direction of flow; I can't remember if the Yaris ones do.

http://shop.microimageonline.com/images/33-2360.jpg
http://shop.microimageonline.com/KN-drop-in-air-filter-33-2360.htm

[RedRide]

Just remember that airfow is from the "bare" cotton side to the wire mesh side for the K&N.
Also, in the Yaris air box, air flow is from bottom to top.

BTW, a K&N is a good choice IMO ...... I have one installed. :smile:

[swidd]

I have this filter too.

Is there any potential for the oil in the filter fouling up the throttle body/header?

It says lifetime filter, with no need to clean for 50,000 miles. Is this taking it too far? Should I clean it more frequently?

I noticed no change in performance or MPG, but still view it as a good purchase because I'll save money over time.

[RedRide]

I have been running K&M air filters for over ten years without a single problem.
A littlle common sense goes a long way when cleaning and re-oiling.

How often you clean them is of course dependant on the driving conditions....how dusty ,etc.
However, I think about 35-40 k miles will do fine under most conditions if you want to maintain optimum air flow.
That is about every three years for the average driver.
This is what I have been doing.

The main advantage of a K&N is that it will open up the "top end" slightly due to better air flow. However, one can not expect any sort of dramatic improvement. They are still worth it IMO if you are keeping the stock airbox.

[Altitude]

Is there any potential for the oil in the filter fouling up the throttle body/header?

Lots of people claim this, but I've had a K&N on my Jeep for over 10 years and the throttle body is not gunked up at all. In fact I'm always surprised how clean it is - which speaks well of the filters ability to trap dirt. Based on my experience this is a myth.

I also have one in my Yaris too, and while I haven't checked the throttle body for build up I suspect it's clean too.

This probably all started when a few dimwits used a whole can of the filter oil then bitched about it all getting sucked into the intake. Follow directions and you won't have any problems.

[Tom48]

If you over oil the filter when you clean it, you will have problems like you described, SOOOOO, don't over oil it.

[RedRide]

Fact is, you have to be a bit of an idiot to over oil it as it's about fool proof if you follow the very simple directions.

[swidd]

Fact is, you have to be a bit of an idiot to over oil it as it's about fool proof if you follow the very simple directions.

Well I'm old enough to know that we're all idiots, and myself even more so. I've done very stupid things under the hood of the car before... like put coolant into the reservoir and not the radiator, and then wonder why the overheat light came on.

[Tom48]

On some of the newer cars you would be the idiot for opening the rad. as you only use the overflow res to add fluid. So the only real idiot is the one that ask and gets the answer and then does it another way thinking they know more than everyone else. I think we all have been there once or twice.

[TRDblueyaris]

good choice! cheaper than TRD filter, yet works the same.

[rningonfumes]

Since this thread is bumped, let me add my opinion on the oiling.

I agree with some of you, I assume I'm the idiot they wrote the instructions for. What I did to prevent over oiling is to spray it and literally let it sit over night away from the car. The nifty thing K&N did with their recharge kit is the oil has a specific orange-red color that is different from the filter material.

It's practically painting by numbers, just give enough passes to the filter as needed to turn it orange/red.