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S80 '06-'16 / V70 & XC70 '07-'16 General Forum for the P3-platform S80 and 70-series models |
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Air filter, why a thin layer of grey foam under the filter?Views : 519 Replies : 4Users Viewing This Thread : |
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May 10th, 2021, 18:13 | #1 |
Junior Member
Last Online: Jul 15th, 2021 15:00
Join Date: Nov 2013
Location: Manchester
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Air filter, why a thin layer of grey foam under the filter?
I've not seen this before when changing air filters. There's a circa 5mmm thin layer of grey foam backed material that's sitting the length and width of the filter baffles.
Is this usual and why does volvo have this? |
May 10th, 2021, 18:31 | #2 |
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Last Online: Dec 26th, 2021 14:42
Join Date: Dec 2013
Location: Crewe
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It's perfectly normal on some Volvo filters but not across the board and I've seen no pattern as to why and when it's fitted.
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2002 S60 SE D5 Manual 209000 miles |
May 10th, 2021, 20:20 | #3 |
Senior Member
Last Online: Jul 4th, 2023 13:54
Join Date: Feb 2013
Location: oxford
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"Active Charcoal"? I think its a higher quality type of filtration, so may not be on some aftermarket replacement elements?
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May 10th, 2021, 20:44 | #4 |
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Last Online: Yesterday 12:30
Join Date: Oct 2018
Location: North of Jedburgh
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VAG cars have similar but it's attached to the paper element of the filter, it's for(according to VAG) "cold climate" conditions.
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V70 2.4 Phase 1.....2435cc.....Registered 31/3/2000.....Leather,AC,CC,etc!.....182k |
May 24th, 2021, 14:34 | #5 |
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Last Online: May 24th, 2021 14:42
Join Date: May 2021
Location: Llanelwy
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Air filter
I was told a couple of years ago it's to prevent from and snow soaking the paper medium in cold climates ??
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