Best way to restore o rings?

[Luxus Panzer]

I know O rings dry and harden over time and I was wondering if there is a product that can be applied/soaked to bring back some life to them?

I also know finding the correct o rings for TT225 injectors can be a pain so that is why I would like to re use these ones if possible.

[Rausch]

I would just replace them. Don't know of any product to restore them. And when you find the correct O-rings save the part number for future reference.

[MoparFreak69]

Just get standard injector o-rings from any auto parts store. Order them for your car.

[jacobsen]

That's a pretty silly question haha you made me laugh...

I understand, but unfortunately the dealership is the cheapest place to get those tt225 o-Rings. You can find them on eBay will be the next cheapest place. I bought them over a year ago and that's the way it was then.

Sent from my SM-G920V using Tapatalk

[5ktq]

They are 3.53 x 7.52mm O-rings. Which is actually a (british) imperial size, BS 203

Nominally 5/16 ID, 9/16 OD, 1/8 c/s

[Spike00513]

Found another forum post where guy says brake fluid restores O-rings. I don't see how.

IDK.
But I have tried to maintain them with DC111. I think my stock injector O-rings came with something else. But otherwise I've used that.

https://www.amazon.com/Dow-Corning-S.../dp/B00CAWWSQU

[Denio24]

dow corning 55 (molykote) lubricates and swells orings

[Spike00513]

dow corning 55 (molykote) lubricates and swells orings

Wonder if that's the same as 111, or if not, which is better for what.
The only reason I heard of 111 is because a Porsche guy said he uses it instead of Unisilikon TK 44 for brake caliper piston seals, since DC is significantly cheaper.
Then again, even if OEM costs more, it's never that much, and the price is worth it for the performance.

"do it right or don't do it at all"
"buy nice or buy twice"
"get it right the first time"

I used HondaBond HT instead of CV Joint Sealant, and it fell apart.

[Luxus Panzer]

They are 3.53 x 7.52mm O-rings. Which is actually a (british) imperial size, BS 203

Nominally 5/16 ID, 9/16 OD, 1/8 c/s

Are these specs for the intake or spray side of the injectors?

[5ktq]

Oh that was for stock, same both ends. Is TT different? I missed that

[Luxus Panzer]

Oh that was for stock, same both ends. Is TT different? I missed that

I came across a thread in my search a few days ago that said so, but I can not confirm.

Anyone?

[Denio24]

Dc 111 is different than dc55

[itsmatt33]

1.8T Fuel Injector Seal Ring / O-Ring Parts Info

OEM
Part #: 035906149A
Size: 7.5mm ID x 3.5mm thick
Quantity: 1
Price: ~$2 - $6 each online, so what's that like $17 at the dealer?
Notes: expensive
genuineaudiparts.com
germanautoparts.com
ecstuning.com


Bosch
Part #: W0133-1641078
Size: 7.52mm x 3.53mm
Quantity: 1
Price: ~ $6 each
Notes: expensive
Work Y/N: Yes, listed in numerous parts databases as a direct OEM replacement, shocker right?


GP Sorensen (discontinued item -> see next entry)
Part #: 800-9212
Size: unknown but they're a perfect fit
Qualtity: set of 8 + a handy application tool
Price: ~ $10
Notes: mythical unless you are Old Guy or Devo, no longer available
Work Y/N: Yes, confirmed by Old Guy + Devo
Still listed on autozone.com


Standard Motor Products / Standard Engine Performance Specialists / Standard / STD (yes, really)
http://www.standardbrand.com/Online%...g/Content.aspx
Part Number: SK1
Size: unknown
Quantity: set of 8 + a handy application tool
Price: ~ $4
http://www.summitracing.com/parts/SMP-SK1/
Part Number: SK9
Size: unknown
Quantity: set of 12 + a handy application tool
Price: ~ $5
Notes: same as the GP Sorenson Kit
www.summitracing.com/parts/SMP-SK9
Work Y/N: Yes, appears to be the new GP Sorenson Kit


DPH (formerly known as Delphi)
Part #: 13641286708
Size: 7.8mm ID x 3.6mm thick
Quantity: 1
Price: ~ $1 each
Notes: listed on ECS' site but superseded to 13641730767 (7.5mm ID x 3.53mm)
Work Y/N: Yes, listed as direct OE replacement part
autohausaz.com
ecstuning.com


Victor-Reinz
Part #: GS33276
Size: 7.52mm x 3.53mm
Quantity: usually a set of 4
Price: ~ $4 - $15
Notes: most commonly listed OEM replacement
Work Y/N: Yes (verified in Mahle Aftermarket Catalog)
http://www.mjmautohaus.com/catalog/ (MJM sells sets of 8 for $10)


Victor-Reinz
Part #: GS33276
Size: 7.52mm x 3.53mm
Quantity: usually a set of 4
Price: ~ $4 - $15
Notes: most commonly listed OEM replacement
Work Y/N: Yes (verified in Mahle Aftermarket Catalog)
http://www.mjmautohaus.com/catalog/ (MJM sells sets of 8 for $10)


Fel-Pro
Part #: ES70599
Size: unknown
Quantity: set of 4
Price: ~ $3 - $6
Notes: unknown
Works Y/N: No, as confirmed by Chadi which sucks cause I have eight sitting on my desk in front of me
autozone.com
advanceautoparts.com
summitracing.com


http://www.audizine.com/forum/showth...r-O-Ring-Seals

[QuattroVAG]

Einszett Gummi Pflege does wonders for rubber. Don't know how well it will restore but it does a hell of a job keeping rubber supple

[Luxus Panzer]

1.8T Fuel Injector Seal Ring / O-Ring Parts Info

OEM
Part #: 035906149A
Size: 7.5mm ID x 3.5mm thick
Quantity: 1
Price: ~$2 - $6 each online, so what's that like $17 at the dealer?
Notes: expensive
genuineaudiparts.com
germanautoparts.com
ecstuning.com


Bosch
Part #: W0133-1641078
Size: 7.52mm x 3.53mm
Quantity: 1
Price: ~ $6 each
Notes: expensive
Work Y/N: Yes, listed in numerous parts databases as a direct OEM replacement, shocker right?


GP Sorensen (discontinued item -> see next entry)
Part #: 800-9212
Size: unknown but they're a perfect fit
Qualtity: set of 8 + a handy application tool
Price: ~ $10
Notes: mythical unless you are Old Guy or Devo, no longer available
Work Y/N: Yes, confirmed by Old Guy + Devo
Still listed on autozone.com


Standard Motor Products / Standard Engine Performance Specialists / Standard / STD (yes, really)
http://www.standardbrand.com/Online%...g/Content.aspx
Part Number: SK1
Size: unknown
Quantity: set of 8 + a handy application tool
Price: ~ $4
http://www.summitracing.com/parts/SMP-SK1/
Part Number: SK9
Size: unknown
Quantity: set of 12 + a handy application tool
Price: ~ $5
Notes: same as the GP Sorenson Kit
www.summitracing.com/parts/SMP-SK9
Work Y/N: Yes, appears to be the new GP Sorenson Kit


DPH (formerly known as Delphi)
Part #: 13641286708
Size: 7.8mm ID x 3.6mm thick
Quantity: 1
Price: ~ $1 each
Notes: listed on ECS' site but superseded to 13641730767 (7.5mm ID x 3.53mm)
Work Y/N: Yes, listed as direct OE replacement part
autohausaz.com
ecstuning.com


Victor-Reinz
Part #: GS33276
Size: 7.52mm x 3.53mm
Quantity: usually a set of 4
Price: ~ $4 - $15
Notes: most commonly listed OEM replacement
Work Y/N: Yes (verified in Mahle Aftermarket Catalog)
http://www.mjmautohaus.com/catalog/ (MJM sells sets of 8 for $10)


Victor-Reinz
Part #: GS33276
Size: 7.52mm x 3.53mm
Quantity: usually a set of 4
Price: ~ $4 - $15
Notes: most commonly listed OEM replacement
Work Y/N: Yes (verified in Mahle Aftermarket Catalog)
http://www.mjmautohaus.com/catalog/ (MJM sells sets of 8 for $10)


Fel-Pro
Part #: ES70599
Size: unknown
Quantity: set of 4
Price: ~ $3 - $6
Notes: unknown
Works Y/N: No, as confirmed by Chadi which sucks cause I have eight sitting on my desk in front of me
autozone.com
advanceautoparts.com
summitracing.com


http://www.audizine.com/forum/showth...r-O-Ring-Seals

Great info, thanks.

so is the top and bottom o ring on a TT injector different sizes? if so...Do I keep these 2 different sizes when I install in a b6 A4 fuel rail?

I found this info...

Top o rings are the same.

OEM 1.8T injector lower 7.5mmx3.5mm
OEM 1.8T 225 Injector Lower 9.3mmx2.6mm

Lower-06A 906 149A (what lower, 1.8t or TT225?)
Upper-035 906 149A (the same between 1.8t and tt225)

[5ktq]

I think the 035 part is the normal one (for both sides of normal injector). TT must be different, if it is indeed different.

These are the stock O-rings. $5 each is insanity. 20 / $2.70 much more sane.

https://www.motioncanada.ca/productD...p?sku=00619879

motion has locations all over canada, industrial supplier. Used to be called 'bearing and transmission', at least out here. But i'd think any industrial bearing / seal outfit local to you should be able to get you a '203' o-ring.

Youll have to cross that different size lower TT one and try and get it for reasonable price too.