40

Air Filter Change

By
ripcurl
1000

Here is the step by step(57 picture) of how to check or replace your air filter. Tools requires are:
-#2 Phillips screw driver
-9/32 socket or flat head screw driver
-Shop vacuum
-Filter of choice .

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Welcome to the internet Unic0rnie, where swearing is not frowned upon nor does it requires censoring. Also there is a button that you should know about, if you look at the letter A on your keyboard, just to the left of that is another button. Press it :P - ripcurl August 26th 2013
HOLY CR*POLA, THERE'S A LOT OF INFORMATION IN THIS CHAPTER!!! - Unic0rnie August 26th 2013
I up-voted this chapter even though it almost overloads the Barrhaven main internet feed line. - q20v August 2nd 2013
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Just for fun, here is a simple rendering of the areas that the intake obtains air.

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And this is what you'll find when you open your hood and head towards this side of the vehicle.

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If you have a 2004 B6 S4, you will have these cover up panels. 2005+ S4s do not. 1-To remove pull up here 2-Once the pressure clips release, pull towards yourself 3-This is to show the rear stud that it resting on

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Remove these two phillip screws at the front intake plenum.

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Apparently this rear section of the plenum might have a sensor/connector/retainer or something attached to it. Check before proceeding that there is nothing connected to it. Squeeze the front middle section of this accordion portion of the upper plenum, and push towards the firewall, then pull up. Might take some messing around, but if you can turn a wrench, you'll get it.

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The end going down into the fender end just lifts out.

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Flip it over and you'll notice a sash/debris filter.

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Remove by pulling the middle away from the retaining tabs.

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What yours might look like.

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hit it with some water.

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followed up by some compressed air to expedite the drying process.

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I think the Buick might have ran over it once or twice. - ripcurl August 3rd 2013
How did you manage to put the brass nipple into your blowy gun all bent sideways like that? - booneylander July 30th 2013
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Back to the engine bay. Twist and pull this front section of intake out if you want. Not necessary, but I took it out to clean it inside and out. I know at the start we removed the screws, but that was to allow for the mid section of intake to have some wiggle room to come out.

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Now your looking at this. The mess was from that pre filter exploding as I took it out. Good time to get the shop vac.

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Squeeze this on the ribbed sides and...

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pull off.

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Up on top, remove this hose and clip by simply lifting up.

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Pull this hose out from its clip, might need two hands for this to pry open the clip a bit.

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Now that I look back at it, I dont think this loom above needs to be removed, but nonetheless I did it, you simply pull it up, while wiggling it back and forth.

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Last but not least is the MAF sensor connector, I found this the most difficult to remove, only because of the position you are in. Get in like this.

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While feeling around, you want to press/squeeze here, but you're doing it blind.

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Get your 9/32nd socket or flat head and loosen this gear clamp.

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Remove this phillips screw, it will not come out all the way, you'll notice when it is disengaged. I'll refer to these screws as the retained phillips.

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Remove this one hiding under this fuel line.

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Now shes ready to come out. Squeeze and pull this section of intake back while pulling the MAF section back and out.

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Between working with all the hoses and other things in the way, these two retained phillips kept getting hung up on the air box it fastens too. Just be gentle, if somethings feels like its stuck, its probably this.

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Once you wrestle this thing out, here it is.

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Note that this MAF screen is delicate and to not just throw this on the ground or soak this in water. Put it all in a safe place for re-install after.

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Now you can go and pull out the air filter.

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Inspect, clean or replace as necessary.

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Look that the base of the air box, and you'll probably see some dirt and other foreign matter. Get the vac.

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Leave no dirt behind.

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Might as well clean in areas that you otherwise cannot access or see :P

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8=======D

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Install your air filter of choice.

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Something to take note of, is the location where the hooks of the top half of the air box hook into. 1-Shows the hook location towards the front of the car. 2-Shows the hook location towards the firewall. Both are hard to really see in person. 3-The hooks that need to be fed in at the base of the air box. By missing this hooks ,your engine will pull in un-filtered air.

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Reinstall the top portion of the box, you'll want a third hand with all the hoses, but its easy. Just make sure those retained phillip screws are pulled out as much as possible.

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Screw these retained phillip screws in.

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In sequence, hose on top, hose below, loom on side, hose below and MAF connector. Tighten the gear clamp with your 9/32nd socket.

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Twist this front plenum in, but do not screw it down yet.

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Grab your upper intake plenum with the pre-filter in it and make sure shes installed correctly. There is only one way it can go in, so real hard to mess up.

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Feed the fender side of the plenum in, there is barely any feedback of anything even connecting. Then compress the accordion section to meet up with the front plenum.

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Feed it in. If you just slam it in there, you'll probably miss the alignment tabs that it needs to slip into.

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Now put the screws to her, no need for torque values, just giver enough.

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Slip and pop in the cover up panel.

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et voila!

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When I clicked on this I thought 57 pictures was a joke and really there would be like 3. I was wrong. - booneylander July 30th 2013
If there were any more steps involved, I'm sure I would be classified as rocket scientist. But I'll settle for genius. - ripcurl July 29th 2013
Nice write up! Did you polish the crankshaft journals "while you were in there"? - q20v July 29th 2013

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