Oiled air filters - do they knacker the MAF?

On a separate thread I am discussing a remap and the question came up about a replacement air filter.

Some people think that one that needs oiling can cause problems with the MAF, others don't thnk it is a problem.

Nige at Angel says that as long as they are not overoiled they are fine.

Any comments?

Banny

Most oiled filters will get over oiled, the result will be a failed MAF Sensor.

what David said...save ur money and keep it in your pocket...

But what if you don't over oil them?

Banny

Originally Posted by banny69

But what if you don't over oil them?

That is the tricky bit.
It is very difficult to avoid putting too much oil on.

When they are new they are usually pre-oiled, such as K&N. From the manufacturer they will be ok to use. Problems usually arise when they are cleaned and re-oiled which is when excessive amounts are used.

The easy answer is to buy an oiled filter, use it and then buy a new one - but you might as well use a paper filter.

slight offset from the original question...

does an excessively oiled filter BUGGER the MAF or just coat it in oil which can be removed carefully?

NONONONONO and er NO

If you are a muppet, you clean your oil filter as per the instructions, you then over oil it as thats what people do. You then pop it back in your car and start the engine and immediately rev the tits off it. You then wonder why your MAF has buggered up a few thousand miles after that (becuase the stickly oil has gone onto the MAF and then any minute particles that get through then stick to that.

NOW PLEASE READ.....

IF and I mean IF, you have the merest ounce of common sense.... what would you do BEFORE you start the engine for the first time after re-installing an oiled filter..... yes you have guessed it..... you take the MAF out.... run the car up for a wee while whilst it sucks the excess off and then pop the little blighter back in. PLEASE do not do what one muppet did and simply unplug it (I wonder how some people have enough intelligence to earn enough money to buy cars at times...).

When we install a CDA or oiled filter in a car for the first time, this is what we do and we have NEVER had a single MAF failure attributable to the filter.

Makes sense dunnit.....

One of the things that always intrigued people that were never in the armed forces is how people who were always got back dry after a day of storms.... well.... we took our clothes off, buried them, fought the foe "tackle out" then cleaned off in the rain, put our dry clothes back on and returned back to base.... dry (anyone in certain services will understand this!) The same principle applies to air flow sensors and oiled filters...... strange world..... or is it just my world that is strange...

We are not worthy, AlfaNige for King.

You must remember alfanige that we are not all the same,a five piece jigsaw puzzle to some is "no problem" but to others it is indeed a puzzle.

ah, it was all a bit in jest, dont take it the wrong way. I assumed that if you knew enough to get as far as removing your CDA or filter then you sort of knew where you were at.

The question is do they actually do anything all these aftermarket filters etc. I would be very happy if there are any volunteers with standard and aftermarket setup to do some testing and measure intake restrictions.

I did some back to back Dyno testing of various induction modifications from new airboxes, different filters and induction lengths and yes it can all make a difference, not really good for large gains though, don't expect much and you won't be too disappointed.

I'v e used oil filters and not had a problem with a MAF but can understand how it can happen, Nigels advice seems sound enough.