Air box question

Andz81 · Jun 12th, 2018, 17:52

Can anyone tell me what the hose coming from the front of the air box is and where it goes to? Mine just has a rubber bung over where the hose would go. Thanks

SteveSarre · Jun 12th, 2018, 18:22

Hi Andz,

Do you have the hose at all, or just a bung ?

Some of my V70s and C70s have a bung and no hose, and some have a hose and no bung!
I haven't worked out what models have what or what it does.

Are you worried that you are missing something?

Steve

Andz81 · Jun 13th, 2018, 11:13

Mine doesn't have the hose,just the bung.I guess it's some sort of option,I'm just interested to know what it's for.

scutyde · Jun 13th, 2018, 12:19

That hose is for the SAS (secondary air system) and it provides filtered air to the air pump below the battery. The pump is active on cold starts and blows air into the exhaust gases in order to heat them up and to bring the catalitic converter faster to its working temperature.
Some cars had this, was more common on natural aspirated engines.

Andz81 · Jun 13th, 2018, 13:31

Thanks for the reply

Jun 12th, 2018, 18:22	#2
SteveSarre Premier Member Last Online: Yesterday 17:43 Join Date: Oct 2004 Location: London/West Country	Hi Andz, Do you have the hose at all, or just a bung ? Some of my V70s and C70s have a bung and no hose, and some have a hose and no bung! I haven't worked out what models have what or what it does. Are you worried that you are missing something? Steve __________________ V70 2.5 Turbo AWD Man. 1999 Red V70 2.5 10V Auto 1998 Green C70 T 20V Auto Conv. 2001 Blue, C70 T5 Auto Conv. 2000 Blue V70 2.5 Turbo AWD Auto 1998 Green, V70 2.5 10V Auto BiFuel 1999 Red (scrapped) V70 20v Auto 1999 Green (scrapped)

Jun 13th, 2018, 12:19	#4
scutyde Retrofit master Last Online: Mar 28th, 2022 10:14 Join Date: Mar 2010 Location: Berlin	That hose is for the SAS (secondary air system) and it provides filtered air to the air pump below the battery. The pump is active on cold starts and blows air into the exhaust gases in order to heat them up and to bring the catalitic converter faster to its working temperature. Some cars had this, was more common on natural aspirated engines. __________________ Volvo 850 2.5 20V MY95 Pictures Here what I retroffited so far List

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Jun 13th, 2018, 11:13	#3
Andz81 New Member Last Online: Jan 19th, 2019 10:10 Join Date: Apr 2018 Location: Farnham	Mine doesn't have the hose,just the bung.I guess it's some sort of option,I'm just interested to know what it's for.

Jun 13th, 2018, 13:31	#5
Andz81 New Member Last Online: Jan 19th, 2019 10:10 Join Date: Apr 2018 Location: Farnham	Thanks for the reply

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