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S70 Turbo: Returning Airbox to Stock Questions?

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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WhatAmIDoing
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Re: S70 Turbo: Returning Airbox to Stock Questions?

Post by WhatAmIDoing » Sat Feb 24, 2018 4:12 pm

abscate wrote:
Sat Feb 24, 2018 3:49 pm
I have a spare MAF for my car and can measure the Oring. I think the 99 air box is the same as the 98?

Maybe?
It appears that 1994 to 1998 used the same MAF. 1999+ models had a different MAF. The housings do look a bit different, but can't tell if the coupling is in fact a different size. Worth a shot, thanks.

Only hit I've got for a part number is 1389108 which is an O-ring that installs on the MAF, but from the diagrams, it is very hard to tell whether it is the part I'm looking for. Volvo dealer 1.5 hours away says they can have it Wednesday for $11, but I'm not convinced it is the correct o-ring.


'98 S70 T5M - 270,000+mi - forever a project
'99 S70 "AWD" - 218,000+mi - project
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erikv11
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Re: S70 Turbo: Returning Airbox to Stock Questions?

Post by erikv11 » Sat Feb 24, 2018 4:42 pm

I just measured the O ring on a 98: it is 70 mm ID, and 5.5 mm thickness.

I think you've got the right part number, e.g. you can see it tucked away in the illustration here https://www.jimellisvolvoparts.com/show ... evel=20459 (if the link works).
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'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 140k
'98 S70 NA, 210k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 280k
'06 S60 R, 160k
gone: '96 NA 850 210k, '98 NA V70 182k

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Re: S70 Turbo: Returning Airbox to Stock Questions?

Post by WhatAmIDoing » Sat Feb 24, 2018 4:56 pm

erikv11 wrote:
Sat Feb 24, 2018 4:42 pm
I just measured the O ring on a 98: it is 70 mm ID, and 5.5 mm thickness.

I think you've got the right part number, e.g. you can see it tucked away in the illustration here https://www.jimellisvolvoparts.com/show ... evel=20459 (if the link works).
Thanks, but what is the outside diameter?


'98 S70 T5M - 270,000+mi - forever a project
'99 S70 "AWD" - 218,000+mi - project
Knows enough to be dangerous :wink:

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Re: S70 Turbo: Returning Airbox to Stock Questions?

Post by scot850 » Sat Feb 24, 2018 5:28 pm

Looking at tat part it fits under the electrical connector on the MAF from the drawing. It is not a large diameter 'O' ring that fits in the hole in the air-box where the MAF attaches.

I have even pulled the old hard copy parts listing and there is no 'O' ring listed that I can find.

If the ID is 70mm the OD is 70 + (2 x 5.5mm) = 81mm if my math is right!

Neil.
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Re: S70 Turbo: Returning Airbox to Stock Questions?

Post by erikv11 » Sat Feb 24, 2018 7:23 pm

I was looking at the diagram wrong, I think Neil is right.

See, https://www.jimellisvolvoparts.com/p/Vo ... 24462.html, correct part number is more likely Volvo 3524462.

I just measured it at 81 mm, Neil's math checks out. All measurements are with calipers. Here are some photos:
IMG_6805.jpg
IMG_6803.jpg
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'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 140k
'98 S70 NA, 210k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 280k
'06 S60 R, 160k
gone: '96 NA 850 210k, '98 NA V70 182k

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Re: S70 Turbo: Returning Airbox to Stock Questions?

Post by WhatAmIDoing » Sat Feb 24, 2018 9:30 pm

scot850 wrote:
Sat Feb 24, 2018 5:28 pm
Looking at tat part it fits under the electrical connector on the MAF from the drawing. It is not a large diameter 'O' ring that fits in the hole in the air-box where the MAF attaches.

I have even pulled the old hard copy parts listing and there is no 'O' ring listed that I can find.

If the ID is 70mm the OD is 70 + (2 x 5.5mm) = 81mm if my math is right!

Neil.
Thanks. Nice to see I learned nothing about circles in all those years of maths. :roll: You confirmed my suspicions about what I thought the part really was.
erikv11 wrote:
Sat Feb 24, 2018 7:23 pm
I was looking at the diagram wrong, I think Neil is right.

See, https://www.jimellisvolvoparts.com/p/Vo ... 24462.html, correct part number is more likely Volvo 3524462.

I just measured it at 81 mm, Neil's math checks out. All measurements are with calipers. Here are some photos:
You are a saint. That's the closest we've gotten to the right o-ring all day. How much searching did it take to find that diagram? Thanks for the pictures, now I actually have some idea of what this is suppose to look like.


'98 S70 T5M - 270,000+mi - forever a project
'99 S70 "AWD" - 218,000+mi - project
Knows enough to be dangerous :wink:

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Re: S70 Turbo: Returning Airbox to Stock Questions?

Post by abscate » Sun Feb 25, 2018 2:52 pm

No Oring in my spare. Thought it came with one,

T he MAF case is 80 mm outer diameter FWIW


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Re: S70 Turbo: Returning Airbox to Stock Questions?

Post by WhatAmIDoing » Sun Feb 25, 2018 3:02 pm

abscate wrote:
Sun Feb 25, 2018 2:52 pm
No Oring in my spare. Thought it came with one,

T he MAF case is 80 mm outer diameter FWIW
Sounds like the 98 and 99 airbox is not the same. If a 98 o-ring is 70mm inside diameter, then that's 10mm of stretch just to get it on the MAF housing. Doesn't sound right. Guessing the MAF housing on 98 is a bit smaller diameter.


'98 S70 T5M - 270,000+mi - forever a project
'99 S70 "AWD" - 218,000+mi - project
Knows enough to be dangerous :wink:

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Re: S70 Turbo: Returning Airbox to Stock Questions?

Post by erikv11 » Sun Feb 25, 2018 8:10 pm

I just put the calipers on a 98 MAF and it is 70 mm OD, so yes the air box hole it fits into (with the o-ring installed) is probably 80 mm ID. I'm all done measuring though!
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'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 140k
'98 S70 NA, 210k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 280k
'06 S60 R, 160k
gone: '96 NA 850 210k, '98 NA V70 182k

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WhatAmIDoing
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Re: S70 Turbo: Returning Airbox to Stock Questions?

Post by WhatAmIDoing » Sun Feb 25, 2018 8:41 pm

I do appreciate all the measurements. Now I know my plan to buy the o-ring for a 99 won't work. Going to hit up the local hardware and plumbing stores tomorrow and see if they have anything comparable to a stock o-ring. Unfortunately, all the local salvage yards only have 1999+ Volvos in their inventory.


'98 S70 T5M - 270,000+mi - forever a project
'99 S70 "AWD" - 218,000+mi - project
Knows enough to be dangerous :wink:

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