One of my maf seal has recently failed and needs replacement. I have a spare one (new) but I'm looking for guidance to do the job properly (I know its going to be a pain as it can easily break).
I intend to try with the engine hot so that the intake horns would be (slightly) dilated, which should ease the installation; but I'm also tempted NOT to use grease or lubricants as we want those seals stay tightly in place, right?
Any suggestions, tools that I should use ?
Thanks!
Changing OEM maf seals
Changing OEM maf seals
RS6 C5 Avant 2003 Daytona Grey
Loba 650 turbos - Wagner IC - 200 cells cats - Milltek cat-back - Hotchkis bars - Bilstein B16 - MTM Wheels - oem coolant cap
Loba 650 turbos - Wagner IC - 200 cells cats - Milltek cat-back - Hotchkis bars - Bilstein B16 - MTM Wheels - oem coolant cap
Re: Changing OEM maf seals
Isn’t there a special VW tool for pressing in?
You can use water to lube. It’ll evaporate.
You can use water to lube. It’ll evaporate.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: Changing OEM maf seals
Thank you Shoppinit! Is there really a specialised tool *just* for this? 
Wow... I'll check what Elsa has to say about it..
Wow... I'll check what Elsa has to say about it..RS6 C5 Avant 2003 Daytona Grey
Loba 650 turbos - Wagner IC - 200 cells cats - Milltek cat-back - Hotchkis bars - Bilstein B16 - MTM Wheels - oem coolant cap
Loba 650 turbos - Wagner IC - 200 cells cats - Milltek cat-back - Hotchkis bars - Bilstein B16 - MTM Wheels - oem coolant cap
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Human Joist
- 3rd Gear
- Posts: 487
- Joined: Sat Aug 02, 2014 6:04 pm
Re: Changing OEM maf seals
Yes there is a tool. And it’s a load of <beep>. I got one for about £30 and the sodding seals wouldn’t go in straight not matter what I tried. Honestly I would read the thread on here recently about sorting them. Then buy the apikol ones from America and fit them. So much easier and loads better. I destroyed two oem seals trying to fit them with the tool
Re: Changing OEM maf seals
Bad news about the tool.. Regarding the Apikol ones, been there already and they lasted less than a year before the glue started to fail. Of course the seals couldn't be reused after that so I went back to the oems, at least they're much cheaper when bought in bulk (https://shops.audi.com/en_GB/web/tradit ... 133428a-10).
Last edited by Classik on Fri Jun 11, 2021 8:25 pm, edited 1 time in total.
RS6 C5 Avant 2003 Daytona Grey
Loba 650 turbos - Wagner IC - 200 cells cats - Milltek cat-back - Hotchkis bars - Bilstein B16 - MTM Wheels - oem coolant cap
Loba 650 turbos - Wagner IC - 200 cells cats - Milltek cat-back - Hotchkis bars - Bilstein B16 - MTM Wheels - oem coolant cap
Re: Changing OEM maf seals
It’s such a <beep> design.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: Changing OEM maf seals
Well, actually job done in 5 minutes, engine cold. 
The trick was tapping vertically and VERY gently with the wooden side of a small hammer whilst keeping the seal in place with the other hand. To push the seal to the bottom of the rim I then used a screwdriver with soft edges (to avoid cutting the rubber) tapped by the small hammer, and confirmed it's properly in place with a borescope.
Sorry for poor English, I hope the above makes sense and could be of some help.
The trick was tapping vertically and VERY gently with the wooden side of a small hammer whilst keeping the seal in place with the other hand. To push the seal to the bottom of the rim I then used a screwdriver with soft edges (to avoid cutting the rubber) tapped by the small hammer, and confirmed it's properly in place with a borescope.
Sorry for poor English, I hope the above makes sense and could be of some help.
RS6 C5 Avant 2003 Daytona Grey
Loba 650 turbos - Wagner IC - 200 cells cats - Milltek cat-back - Hotchkis bars - Bilstein B16 - MTM Wheels - oem coolant cap
Loba 650 turbos - Wagner IC - 200 cells cats - Milltek cat-back - Hotchkis bars - Bilstein B16 - MTM Wheels - oem coolant cap
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IchBautAuto
- 4th Gear
- Posts: 618
- Joined: Thu Feb 20, 2014 11:23 pm
- Location: Australia
Re: Changing OEM maf seals
You don't need the glue for the Apikol seal if the maf is seated fully, the seal has nowhere to go. When I first fitted the seals I found that one adhered perfectly and one didn't. Probably some silicon or something contaminated the manifold surface for me.Classik wrote: ↑Fri Jun 11, 2021 7:56 pmBad news about the tool.. Regarding the Apikol ones, been there already and they lasted less than a year before the glue started to fail. Of course the seals couldn't be reused after that so I went back to the oems, at least they're much cheaper when bought in bulk (https://shops.audi.com/en_GB/web/tradit ... 133428a-10).
As an aside, I've been looking at the old V8 Touareg engine and the maf design on those looks a far better solution.
C5 RS6, Milltek and Wagners: B5 RS4 450 + HP: A4 1.8 GP TQS original: 1963 UNIMOG 404:
Re: Changing OEM maf seals
Thanks for this link, just what I needed, BUT then when i tried to place the order for two seals, there was a big message in read print, saying that due to BREXIT, (they RECKED IT!) they cannot deliver to the UK as their systems cannot cope with different tax rates or bull of similarClassik wrote: ↑Fri Jun 11, 2021 7:56 pmBad news about the tool.. Regarding the Apikol ones, been there already and they lasted less than a year before the glue started to fail. Of course the seals couldn't be reused after that so I went back to the oems, at least they're much cheaper when bought in bulk (https://shops.audi.com/en_GB/web/tradit ... 133428a-10).
!!!Any suggestions welcome
2003 RS6 C5 Avant Black on 19's
Re: Changing OEM maf seals
Live in the EU?
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
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