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2000 A6 4.2: B2S1 O2 sensor removal

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Old 04-05-2014, 02:40 PM   #1
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Default 2000 A6 4.2: B2S1 O2 sensor removal

I am stuck.
I can't figure out a way to remove the B2 S1 (driver side, upstream) O2 sensor. Space is SO tight, worse than anything I have seen before (2.7T for example).
Need tips on how to get it out (have code).
Car on jacks.

ANY suggestions?
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1999 Passat 1.8T manual; Kraftwerk Turbo TM3, 550cc Bosch EV14, FSI coils, 3" MAF, 3" DP, custom TIP, FMIC, Kraftwerk Tune

2002 Audi Allroad 2.7T quattro manual; Kraftwerk Turbo TM4, 750cc Bosch EV14, FSI coils, stg 5 clutch, FMIC

2002 A6 3.0 bad (auto), waiting for 2.7T to be swapped in

2000 A4 ATW manual, blown 1.8T, waiting for build block, AEB heads, big turbo, water/meth.

www.regulatorfix.com
www.kraftwerkturbo.com
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Old 04-05-2014, 03:24 PM   #2
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The Bentley manual says to remove the exhaust pipe, then remove the sensor from the pipe.
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Old 04-05-2014, 03:39 PM   #3
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Quote:
Originally Posted by georgeb944 View Post
The Bentley manual says to remove the exhaust pipe, then remove the sensor from the pipe.
Don't believe everything you read.
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Old 04-05-2014, 03:41 PM   #4
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I have not done that particular sensor, but IIRC there have been multiple discussion of removing difficult 02 sensors from the top with a series of taped-together extensions and swivel joints.

STFA more.
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Old 04-05-2014, 03:41 PM   #5
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Quote:
Originally Posted by georgeb944 View Post
The Bentley manual says to remove the exhaust pipe, then remove the sensor from the pipe.
That's just as bad (assuming the exhaust/downpipe bolts are rusted solid and hard to access).
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1999 Passat 1.8T manual; Kraftwerk Turbo TM3, 550cc Bosch EV14, FSI coils, 3" MAF, 3" DP, custom TIP, FMIC, Kraftwerk Tune

2002 Audi Allroad 2.7T quattro manual; Kraftwerk Turbo TM4, 750cc Bosch EV14, FSI coils, stg 5 clutch, FMIC

2002 A6 3.0 bad (auto), waiting for 2.7T to be swapped in

2000 A4 ATW manual, blown 1.8T, waiting for build block, AEB heads, big turbo, water/meth.

www.regulatorfix.com
www.kraftwerkturbo.com
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Old 04-05-2014, 03:42 PM   #6
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Quote:
Originally Posted by SloopJohnB@mac.com View Post
Don't believe everything you read.
I don't. But nothing to read in your post.
Something still better than nothing.
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1998 Passat 1.8T manual; Kraftwerk Turbo TM2, 550cc Bosch EV14, FSI coils, 3" MAF, 3" DP, high flow manifold, S4 clutch, single mass FW, FMIC, custom TIP, Kraftwerk Tune

1999 Passat 1.8T manual; Kraftwerk Turbo TM3, 550cc Bosch EV14, FSI coils, 3" MAF, 3" DP, custom TIP, FMIC, Kraftwerk Tune

2002 Audi Allroad 2.7T quattro manual; Kraftwerk Turbo TM4, 750cc Bosch EV14, FSI coils, stg 5 clutch, FMIC

2002 A6 3.0 bad (auto), waiting for 2.7T to be swapped in

2000 A4 ATW manual, blown 1.8T, waiting for build block, AEB heads, big turbo, water/meth.

www.regulatorfix.com
www.kraftwerkturbo.com
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Old 04-05-2014, 05:27 PM   #7
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The driver's side sensor is very easy compared to the pass side. Just remove the coolant tank and the sensor is straight down.

Having one of these makes it easy:
http://www.ecstuning.com/ES5026/

The pass side sensor I have tried twice to remove and haven't been able to get it yet. Will be giving it another go next month when I do the oil change.
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Old 04-05-2014, 07:01 PM   #8
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Quote:
Originally Posted by vtraudt View Post
I don't. But nothing to read in your post.
Something still better than nothing.
Some thing can be worse than something. If you went for the exhaust drop first, that's worse than nothing.
Keep reading.
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Old 04-06-2014, 03:19 AM   #9
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Quote:
Originally Posted by pearlwhitesix View Post
The driver's side sensor is very easy compared to the pass side. Just remove the coolant tank and the sensor is straight down.

Having one of these makes it easy:
http://www.ecstuning.com/ES5026/

The pass side sensor I have tried twice to remove and haven't been able to get it yet. Will be giving it another go next month when I do the oil change.
Those wrenches certainly make it easier to get at the O2 sensors but can be had for much cheaper than ECS. I think I paid like $12 for mine from Advance Auto. For something I may use once a year, that's more than adequate.
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Old 04-06-2014, 03:47 AM   #10
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Quote:
Originally Posted by pearlwhitesix View Post
The driver's side sensor is very easy compared to the pass side. Just remove the coolant tank and the sensor is straight down.

Having one of these makes it easy:
http://www.ecstuning.com/ES5026/
Just checked from above: driver side indeed easy from top (just need to dig out the above tool. For those that need to save money so they can buy performance parts for their Audis: I have been using this one for several years at 1/4 of the ECS price:
http://www.harborfreight.com/3-8-eig...nch-97177.html
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1998 Passat 1.8T manual; Kraftwerk Turbo TM2, 550cc Bosch EV14, FSI coils, 3" MAF, 3" DP, high flow manifold, S4 clutch, single mass FW, FMIC, custom TIP, Kraftwerk Tune

1999 Passat 1.8T manual; Kraftwerk Turbo TM3, 550cc Bosch EV14, FSI coils, 3" MAF, 3" DP, custom TIP, FMIC, Kraftwerk Tune

2002 Audi Allroad 2.7T quattro manual; Kraftwerk Turbo TM4, 750cc Bosch EV14, FSI coils, stg 5 clutch, FMIC

2002 A6 3.0 bad (auto), waiting for 2.7T to be swapped in

2000 A4 ATW manual, blown 1.8T, waiting for build block, AEB heads, big turbo, water/meth.

www.regulatorfix.com
www.kraftwerkturbo.com
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Old 04-06-2014, 04:04 AM   #11
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Quote:
Originally Posted by Gsrob View Post
Those wrenches certainly make it easier to get at the O2 sensors but can be had for much cheaper than ECS. I think I paid like $12 for mine from Advance Auto. For something I may use once a year, that's more than adequate.
Using it since years from my 'cheap but some tools actually good' store (best tool bar none):
http://www.harborfreight.com/3-8-eig...nch-97177.html
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1998 Passat 1.8T manual; Kraftwerk Turbo TM2, 550cc Bosch EV14, FSI coils, 3" MAF, 3" DP, high flow manifold, S4 clutch, single mass FW, FMIC, custom TIP, Kraftwerk Tune

1999 Passat 1.8T manual; Kraftwerk Turbo TM3, 550cc Bosch EV14, FSI coils, 3" MAF, 3" DP, custom TIP, FMIC, Kraftwerk Tune

2002 Audi Allroad 2.7T quattro manual; Kraftwerk Turbo TM4, 750cc Bosch EV14, FSI coils, stg 5 clutch, FMIC

2002 A6 3.0 bad (auto), waiting for 2.7T to be swapped in

2000 A4 ATW manual, blown 1.8T, waiting for build block, AEB heads, big turbo, water/meth.

www.regulatorfix.com
www.kraftwerkturbo.com
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Old 04-06-2014, 08:26 AM   #12
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Dang, I could've saved five bucks! I love harbor freight. I've got a number of great tool stuff from there but my favorite is the low profile jack. There are some questionable tools as far as reliability goes but overall they're worth a look. I'm about to use that same wrench today as I get under my car to yank out an old 02 that's been troubling me.
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Old 04-08-2014, 05:57 PM   #13
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Default Crows foot socket worked for me

That is what I used to get the passenger side out along with a swivel ratchet. Try going at it from the very back of the engine from the top. Remove all of the air duct hoses (sorry don't know tech name is). Lean over your engine from the front to reach it. It is slightly off to the outer side of the manifold. If you have skinny arms, even better. I had bruises on my arms for a week afterwards. Good luck.
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