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View Full Version : Question on MAF Sensor and its Cleaning



woolveren
04-20-2013, 09:09 AM
Hi,

I just removed the air box on my 1.8t and below is a picture of the MAF sensor with housing. This is the first time am cleaning a MAF, so already went through couple of DIY's but still got a question.

For cleaning the MAF do I need to remove the electrical sensor marked in the pic below?

Also, I've noticed that there is only net on one side of the MAF and the turbo hose inlet side is just open. Is this how MAF came in B5's? Or is it missing something at one end?

http://img405.imageshack.us/img405/5002/dsc0131fo.jpg (http://imageshack.us/photo/my-images/405/dsc0131fo.jpg/)

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Seerlah
04-20-2013, 12:02 PM
You want to clean the actual maf element, which is that electrical thing in the middle. That screen is there to break up the air current for the maf reading.

woolveren
04-20-2013, 12:10 PM
Okay, I figured it out from another DIY. I just cleaned the sensor screen without removing the security lock screws using CRC spray.

Also, I just saw THIS air filter when I opened the air box. This was supposed to be replaced by a mann filter 1 1/2 yrs ago when the turbo got replaced, but seems like mechanic forgot to do that. So this filter might be sitting there for more than 3 yrs and I don't know who put this. It has metal net all over the filter and doesn't carry any brand name. Does anybody know what type of filter is this?

http://img827.imageshack.us/img827/2971/dsc0134mx.jpg (http://imageshack.us/photo/my-images/827/dsc0134mx.jpg/)

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http://img855.imageshack.us/img855/1569/dsc0135ls.jpg (http://imageshack.us/photo/my-images/855/dsc0135ls.jpg/)

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jvega21
04-20-2013, 01:16 PM
Looks like a k&n

Seerlah
04-20-2013, 01:31 PM
You can just clean and respray that filter.

woolveren
04-20-2013, 02:04 PM
You can just clean and respray that filter.

I just picked an OEM Mann filter from napa and replaced the shit above..

catbed
04-20-2013, 04:12 PM
I just picked an OEM Mann filter from napa and replaced the shit above..

The "shit" is actually cotton gauze re-usable filter made by K&N. Hope you didn't throw it out, as it can be cleaned and used again.

woolveren
04-20-2013, 04:37 PM
The "shit" is actually cotton gauze re-usable filter made by K&N. Hope you didn't throw it out, as it can be cleaned and used again.

As I mentioned above that filter was there for more than 3 yrs. No way am going to re-use it...[facepalm]


But I was just stunned at the price of this filter after doing a quick google search.

.. $71 [eek]

http://www.knfilters.com/search/product.aspx?prod=33-2125


I can see that the original color of this filter is pomegranate and the filter in my car has turned black completely.

woolveren
04-20-2013, 04:44 PM
Another thing I've noticed is that the rubber gasket at the turbo hose inlet end of the MAF sensor is kind of of bend/broken as shown in the below pic. Since I didn't have any gasket available, I just re-used this gasket. Does it looks really bad? Do I need to replace this soon?

http://img507.imageshack.us/img507/1300/dsc0139hc.jpg (http://imageshack.us/photo/my-images/507/dsc0139hc.jpg/)

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Seerlah
04-20-2013, 05:15 PM
Mine didn't even have one and ran it like that for years with no issue.

Stranger
04-20-2013, 07:06 PM
The turbo inlet hose only needs to create a seal around the maf housings diameter. Not sure what that rubber is but I would just rip it off and clean the maf housing to make a better seal with the tip.