Recent Topics
Google maps Pacman! A great time waster
by xfactor9
04/01/15 04:41 AM
CL Ad w/ MY PICTURE of MY CAR in it!!
by Turk
04/01/15 04:15 AM
Regional sludging? How to deal with it?
by Oro_O
04/01/15 04:02 AM
NYPD back in the news again, and it's not good
by xfactor9
04/01/15 01:00 AM
how good are tecumseh small engines
by ram_man
04/01/15 12:47 AM
Amsoil coming to a Walmart near you!
by Merkava_4
04/01/15 12:05 AM
Should I change it?
by Throt
03/31/15 11:28 PM
Got me a BlueDriver
by 1kickbuttranger
03/31/15 10:56 PM
Havoline High Mileage 5W-20 $12.49 (5 qts)
by ThirdeYe
03/31/15 10:54 PM
Fram Ultra Cut Open XG6607 (2,334 miles OCI)
by davison0976
03/31/15 10:31 PM
Back Taxes On a Property Im Interested In
by JHZR2
03/31/15 10:24 PM
Toyota 90915-YZZG1 Cut Open
by NeilR
03/31/15 09:13 PM
Newest Members
RandyRay, MotoMike73, jcansler, sfhgolftdi, Mac76
53397 Registered Users
Who's Online
38 registered (1foxracing, 2010_FX4, chrisri, bradepb, 7 invisible), 683 Guests and 178 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
53397 Members
66 Forums
229024 Topics
3660476 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG
Topic Options
#3182975 - 11/09/13 12:58 PM Do any of these need replacing?
llmercll Offline


Registered: 09/01/13
Posts: 33
Loc: ny
I'm relatively new to car maintenance and am not sure how to tell if my air filter or o2 sensor needs replacing. Typically if the air filter is dirty I would replace it, but this is a k&n and is red, so I'm not sure what I'm looking for.

http://imgur.com/PaZmXGr
http://imgur.com/Bs7bOAM
http://imgur.com/44jqKZI
http://imgur.com/gDoYiSH

any input on the state of mine or what i should look for in the future is very appreciated,

thanks!

Top
#3182978 - 11/09/13 01:07 PM Re: Do any of these need replacing? [Re: llmercll]
danster Offline


Registered: 09/27/09
Posts: 80
Loc: Nebraska
The air filter is fine. It doesn't look like it is even ready for cleaning. When you do clean in in another 20,000 miles use the cleaning and re-oiling kit available from K&N.

The O2 sensor looks fine but I don't think you can go by looks. Most manufacturers have a replacement interval based on mileage or you can measure the output with a VOM on a running car.


Edited by danster (11/09/13 01:08 PM)

Top
#3182982 - 11/09/13 01:16 PM Re: Do any of these need replacing? [Re: llmercll]
Donald Offline


Registered: 03/21/04
Posts: 14561
Loc: Upstate NY
I am not a fan of K&N. I would replace it with a high quality media filter. Your engine will ingest less silicon.

As for the O2, if its an upstream, then roughly ever 100K replacement. If downstream, wait for a code.

If you do replace the O2, either get an OEM or the same company that made the OEM,


Edited by Donald (11/09/13 01:17 PM)
_________________________
2001 Jeep Grand Cherokee Laredo 4.0 - PP & M1
1999 Dodge Ram 2500 w/Cummins - Rotella T6 & M1
Amsoil ATF in both vehicles & Magnefine filter.

Top
#3182985 - 11/09/13 01:21 PM Re: Do any of these need replacing? [Re: llmercll]
llmercll Offline


Registered: 09/01/13
Posts: 33
Loc: ny
thanks guys, i didnt even know the k7n was replacable, i thought all air filters were disposable. looks like my car came with a real nice air filter from a few google searches.

as for the o2 sensor, downstream means after the cat, upstream means before, right?

thanks!

Top
#3182987 - 11/09/13 01:22 PM Re: Do any of these need replacing? [Re: llmercll]
Trav Offline


Registered: 11/20/06
Posts: 11308
Loc: MA, Mittelfranken.de
How many miles on the O2? There are two schools of though on O2 sensors. Some say change it when it throws a CEL others change them as a maintenance item.
I change them out at 100-125K, they do get lazy and are probably not performing optimally at about that mileage.

Filter looks fine if you like K&N.
_________________________
ASE L1, Master. Deutsch Meisterbrief.

Top
#3182989 - 11/09/13 01:24 PM Re: Do any of these need replacing? [Re: llmercll]
bigjl Offline


Registered: 09/06/12
Posts: 1715
Loc: London, England
If the OP is happy with a K&N why comment about changing it?

I expect if you replaced it with a piece of wood it would stop even more silicon.

Air filtration is not an exact science.

There is always a compromise between the best possible filtration and flow being reduced so that performance is affected

I will post up pictures of the air filter in my XJL which would appear to have been the factory fitted one, 90k round London in two years!

It would certainly have been filtering well as not much would hsve been getting through.

But it did 27mpg for the first 1000 miles i did and over the last 1200 it has done 37mpg, i did do more out of town usage but not enough to explain that difference.

The DPF light has also not come on since and the vehicle is much happier driving round town.

If the OP is happy then it is all good in my book.

I certainly would be happy to leave that filter another 10k before rechecking and even considering a clean and reoil.
_________________________
06 Clio1.5DCi,141k 6kOCI Shell Extra 5w40
08 Pathfinder 2.5 Dci Sold with 125k
12 Jaguar XJL 3.0 D Luxury 120k 8kOCI Mob 1 ESP 5w30

Top
#3182994 - 11/09/13 01:28 PM Re: Do any of these need replacing? [Re: llmercll]
Donald Offline


Registered: 03/21/04
Posts: 14561
Loc: Upstate NY
Originally Posted By: llmercll
thanks guys, i didnt even know the k7n was replacable, i thought all air filters were disposable. looks like my car came with a real nice air filter from a few google searches.

as for the o2 sensor, downstream means after the cat, upstream means before, right?

thanks!


K&N's claim to fame is that it does not restrict the flow of air and you can clean and re-oil it. In practice I do not believe a clean air filter restricts air much more than a K&N. But people with UOA who use a K&N usually see more silicon in the oil (from the air). There is also some concern that people over-oil the filters after cleaning and it messes up the MAF sensor.
_________________________
2001 Jeep Grand Cherokee Laredo 4.0 - PP & M1
1999 Dodge Ram 2500 w/Cummins - Rotella T6 & M1
Amsoil ATF in both vehicles & Magnefine filter.

Top
#3183012 - 11/09/13 01:48 PM Re: Do any of these need replacing? [Re: Donald]
Chris142 Offline


Registered: 06/05/03
Posts: 12245
Loc: apple valley, ca
Originally Posted By: Donald
I am not a fan of K&N. I would replace it with a high quality media filter. Your engine will ingest less silicon.

As for the O2, if its an upstream, then roughly ever 100K replacement. If downstream, wait for a code.

If you do replace the O2, either get an OEM or the same company that made the OEM,
x2
_________________________
02 Wrangler qsgb 5w30
87 F250 Diesel Mag1 5w40
04 Tahoe super-s 5w30
Z400 Lucas 10w30
KLR250 Maxima 10w40
Polaris Trailblazer delo 5w40

Top
#3183029 - 11/09/13 02:17 PM Re: Do any of these need replacing? [Re: llmercll]
andyd Offline


Registered: 09/25/04
Posts: 4074
Loc: Marshfield , MA
A fellow I know has a 535i, the E28 version, with 500K miles on it. He taps the paper element on his shoe every so often. Air filter and fuel filter change intervals are very much dependent on conditions.
_________________________
2 1988 BMW 528e 20w50 dino, STP filter

1994 Ranger ,600$ Rat, 5w30 dino, STP filter

Top
#3183040 - 11/09/13 02:39 PM Re: Do any of these need replacing? [Re: llmercll]
Warstud Offline


Registered: 09/02/05
Posts: 3206
Loc: MIchigan
I don't consider them a maintenance item. A CEL or bad gas mileage is the only time I change them. On some vehicles an 02 can cost $100 or more.
OP...don't forget some anti-seize on it before you put it back on.

Top