Author Topic: Dusty Airbox  (Read 203 times)

April 15, 2018, 11:34:08 AM
Read 203 times

Bravofox

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After my 45'000km service of my 2015 3.6 Outback on Friday, I decided this morning to take a quick look at the airbox myself. Attached is the photos of AFTER the filter. My 3 years was up yesterday so my maintenance plan has expired, but it seems good practice to rather service your car yourself anyway...
2015 Outback 3.6R-S
-ex- 2006 Impreza 2.0R Wagon.
-ex -2009 SH XT A/T
-ex- 2009 SG9 XT Premium Manual
-ex- 2006 Impreza 2.0R Manual
-ex- 2002 Legacy 2.5GX A/T

April 15, 2018, 11:36:12 AM
Reply #1

Bravofox

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Intake after the MAF.
2015 Outback 3.6R-S
-ex- 2006 Impreza 2.0R Wagon.
-ex -2009 SH XT A/T
-ex- 2009 SG9 XT Premium Manual
-ex- 2006 Impreza 2.0R Manual
-ex- 2002 Legacy 2.5GX A/T

April 15, 2018, 03:58:52 PM
Reply #2

LoopSoosStroop

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Ja, that's messed up man.

I'm doing everything myself and my car is still blowing up.
2007 XT AT
Midrand - Gauteng

April 16, 2018, 10:52:14 AM
Reply #3

Bravofox

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It seems that the Air Filter was replaced at 30'000km and this is my Airbox at 43'000km. Subaru SA's technical guru says that this amount of dust is normal if the Air cleaner element is blocked ??? and is not damaging to the engine  :o
2015 Outback 3.6R-S
-ex- 2006 Impreza 2.0R Wagon.
-ex -2009 SH XT A/T
-ex- 2009 SG9 XT Premium Manual
-ex- 2006 Impreza 2.0R Manual
-ex- 2002 Legacy 2.5GX A/T

April 16, 2018, 11:22:39 AM
Reply #4

berndp

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The more blocked the filter is, the better it filters.

BUT, if the gasket is shot, then it bypasses more when it gets blocked......
Subaru Forester 2005 2.5 Xsel
Always looking for a tar free "road"
Brackenfell, W'Cape

April 16, 2018, 11:32:51 AM
Reply #5

Bravofox

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The more blocked the filter is, the better it filters.

BUT, if the gasket is shot, then it bypasses more when it gets blocked......
My point exactly! The filter really does not have a gasket. Just a piece of filter media around the edge that presses against the frame and the airbox. I have now done the same that I did on my Husqvarna 701 to help and keep out dust (which seems to be successful to some extend) and that is to apply some Petroleum Jelly (Vaseline) around the filter edges before refitting it.
« Last Edit: April 16, 2018, 11:34:49 AM by Bravofox »
2015 Outback 3.6R-S
-ex- 2006 Impreza 2.0R Wagon.
-ex -2009 SH XT A/T
-ex- 2009 SG9 XT Premium Manual
-ex- 2006 Impreza 2.0R Manual
-ex- 2002 Legacy 2.5GX A/T

April 17, 2018, 06:50:47 AM
Reply #6

Garrsie

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My solution to my F%$&@ annoying airbox... and turbo inlet pipe. This was for a speed density tune but ended up going with normal tune because the auto didn't want to play ball so a different cold air intake was installed (with a pre-MAF air stream straightener) to include the MAF.
2006 Forester XT, Wiseco pistons, 18"Koya lightweight wheels, Bridgestone re002, VF48, '07 STi IC, 76mm exhaust, Walbro 255 fuel pump, Mishimoto inlet pipe, Phenolic intake spacers, Gizmo Electronic Boost Controller, TGV deletes. BC RA Coilovers, Brembo big Calipers, PB RS 326mm Discs, Coolboost WMI

April 17, 2018, 07:14:04 AM
Reply #7

Bravofox

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My solution to my F%$&@ annoying airbox... and turbo inlet pipe. This was for a speed density tune but ended up going with normal tune because the auto didn't want to play ball so a different cold air intake was installed (with a pre-MAF air stream straightener) to include the MAF.
Sorry, but here in the dusty Karoo THAT type of filter is a recipe for disaster. Not to mention degraded performance in my case from sucking in hot air from the engine bay. I'll just make sure that my filter seals properly.
2015 Outback 3.6R-S
-ex- 2006 Impreza 2.0R Wagon.
-ex -2009 SH XT A/T
-ex- 2009 SG9 XT Premium Manual
-ex- 2006 Impreza 2.0R Manual
-ex- 2002 Legacy 2.5GX A/T

April 17, 2018, 08:25:08 AM
Reply #8

Garrsie

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Sorry, but here in the dusty Karoo THAT type of filter is a recipe for disaster. Not to mention degraded performance in my case from sucking in hot air from the engine bay. I'll just make sure that my filter seals properly.
[/quote]

Yeah, may not be that dust friendly. I forgot to mention the filter is going to get a box around it to insulate from the engine bay.
2006 Forester XT, Wiseco pistons, 18"Koya lightweight wheels, Bridgestone re002, VF48, '07 STi IC, 76mm exhaust, Walbro 255 fuel pump, Mishimoto inlet pipe, Phenolic intake spacers, Gizmo Electronic Boost Controller, TGV deletes. BC RA Coilovers, Brembo big Calipers, PB RS 326mm Discs, Coolboost WMI

April 17, 2018, 09:58:21 AM
Reply #9

berndp

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The more blocked the filter is, the better it filters.

BUT, if the gasket is shot, then it bypasses more when it gets blocked......
My point exactly! The filter really does not have a gasket. Just a piece of filter media around the edge that presses against the frame and the airbox. I have now done the same that I did on my Husqvarna 701 to help and keep out dust (which seems to be successful to some extend) and that is to apply some Petroleum Jelly (Vaseline) around the filter edges before refitting it.

Do you have OEM filter?

I know some of these GUD filters just have a "hardend" section around the edges, and the box has like a knife edge moulding to depress into the edges. Not the best idea for dust, in my opinion.
But then most of these filters are designed for city dust, not lekker gravel road dust.
Subaru Forester 2005 2.5 Xsel
Always looking for a tar free "road"
Brackenfell, W'Cape

April 17, 2018, 11:01:14 AM
Reply #10

Bravofox

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Do you have OEM filter?

I know some of these GUD filters just have a "hardend" section around the edges, and the box has like a knife edge moulding to depress into the edges. Not the best idea for dust, in my opinion.
But then most of these filters are designed for city dust, not lekker gravel road dust.

Yes, the Subaru Denso one as installed by the dealer. The design is also about the same as your description of the GUD. Pathetic! After 14 years of Subaru ownership, this was the first time I found dust in my Airbox. I think the filters that they use are crap.
« Last Edit: April 17, 2018, 11:04:10 AM by Bravofox »
2015 Outback 3.6R-S
-ex- 2006 Impreza 2.0R Wagon.
-ex -2009 SH XT A/T
-ex- 2009 SG9 XT Premium Manual
-ex- 2006 Impreza 2.0R Manual
-ex- 2002 Legacy 2.5GX A/T