Project 6T6. B6 A4 1.8t/Tip to 2.7t/6-Speed

[chris_72]

Hey everyone,

I got my hands on a nice clean 2903 B6 A4 Avant. I love the car, but honestly the 1.8T with a Tiptronic behind it just isn't cutting it.


So shortly thereafter I came across a low mile C5 A6 2.7T with the 01E 6-speed behind it. The car had over $8500 dollars worth of work done to it at the local Audi dealer - including new OEM turbos. Snagged this thing for $1000!

Anyway, I'm looking to dump the 01E and 2.7T into my B6. I've seen many builds and some threads full of all kinds of nice info on the swap.
I'm still looking for Bentley Manuals for both the B6 and C5. I need all the wiring diagrams to make sure the info I found on the forum is all good. Not that I don't trust whoever wrote up all the stuff, I just like to cross all my T's and dot all my I's.
That being said, I'm no Audi wire diagram pro, but I should be able to figure out what's going on. Anyway, I started pulling the 2.7/01E out of the A6

Anyways, I guess I'll post more info as it comes along. Expect progress to be fairly slow, because I'm ridiculously busy at work, and I don't have a garage.

[B72011]

Ok, so,let me get this straight.....#1 You're putting a 2.7 into a B6 without being a wiring pro---- #2 youre in Canada.....in winter.....without a garage---#3 super busy at work.
This ought to be an interesting thread.

[chris_72]

The answer for #1-3 is yes. As far as #1 goes - I'm no pro, but I can hold my own. I finished up a 4.2 V8 swap in my B5 S4, and was able to figure it out using the wiring diagrams in a Bently manual.
But overall, this swap is nothing groundbreaking - it's been done. I'm sure if I run into any issues there will be a few people that would be able to help.

[tchuck]

That A6 was an amazing score. Good luck on the swap. No garage in Canadia is brutal.

[chris_72]

Well, it's about 40*F outside and we haven't had any snow yet. But they say a small storm is coming tonight. But yeah, I feel like I really did luck out on my A6.

Now I hear that the engine and wiring in the A6 are identical to the B5 S4. Anyone have any clue about that?

[tchuck]

...

Now I hear that the engine and wiring in the A6 are identical to the B5 S4. Anyone have any clue about that?

The engine is definitely interchangeable. Not sure about all the wiring. Probably some of it though. The ECU's are definitely different. I can take some pics for you if you want. My b5s4 is currently in 50 pieces in the garage...
.

[chris_72]

The engine is definitely interchangeable. Not sure about all the wiring. Probably some of it though. The ECU's are definitely different. I can take some pics for you if you want. My b5s4 is currently in 50 pieces in the garage...
.

If you happen to have the number on your ECU, that would be helpful. Along with the year, engine code and what transmission your car came with. If the ECU is the same as mine, I can bet that the wire harness is going to be the same.

[tchuck]

If you happen to have the number on your ECU, that would be helpful. Along with the year, engine code and what transmission your car came with. If the ECU is the same as mine, I can bet that the wire harness is going to be the same.

It's an 01.5 with an APB engine and 01E six speed. I'll get the ECU number in a bit.

[chris_72]

Here's the factory build sheet for my A6. A hell of a lot of options on this car!

But so far - so good! I've got the same motor APB and the same 01E transmission.
I'm wondering if I'd be able to get the wire harness part number without having to call the dealer. Might be on the paper sticker that was wrapped around the end of the harness (part that was tucked in the "plenum box" by the ECU. That would basically confirm everything. If the harness is the same as the B5 S4, then I could use the Bently manual I have for the B5 and only would have to buy the B6 manual. In effect that would save me $129.99 USD. In Canadian terms... $200+ by the time shipping and duty fees are applied.

[SleeperAvant]

Wow you're in Burlington! 15 minutes away would love to stop by and check it out.

[chris_72]

I just moved to a hole in the ground in Hamilton. Got sick of paying a 2800/month mortgage! Pm me and I'll shoot you my number. I don't know any local Audi guys!

[SleeperAvant]

PM'd

[james.zlomak]

You want to sell the 1.8 ?

[tchuck]

...
I'm wondering if I'd be able to get the wire harness part number without having to call the dealer. Might be on the paper sticker that was wrapped around the end of the harness (part that was tucked in the "plenum box" by the ECU. That would basically confirm everything. If the harness is the same as the B5 S4, then I could use the Bently manual I have for the B5 and only would have to buy the B6 manual. In effect that would save me $129.99 USD. In Canadian terms... $200+ by the time shipping and duty fees are applied.

Sorry man, I haven't had a chance to get the harness number but I will.

[ADCS]

Looks like fun!
I am in the hammer as well and doing a similar swap.

[SleeperAvant]

Looks like fun!
I am in the hammer as well and doing a similar swap.

Would love to check out your swap also.

[chris_72]

Nice, a few local peeps! That's alright! SleeperAvant - I got your pm and I'll shoot you a message via txt in the new year. ADCS - the car is actually in Hamilton. I have to do 2 motor pulls this coming week and I'll be able to get back to the swap. Time is just flying by.

[chris_72]

Ok, so I froze my dick off but I got the 2.7t and the 01E out of the A6. Now I want to pull the rear subframe/diff/suspension. Then the pedal assembly and off to the bone yard.
Don't have any pics, because my phone was dead most of the day today.

[tchuck]

...
I'm wondering if I'd be able to get the wire harness part number without having to call the dealer. Might be on the paper sticker that was wrapped around the end of the harness (part that was tucked in the "plenum box" by the ECU. That would basically confirm everything. If the harness is the same as the B5 S4, then I could use the Bently manual I have for the B5 and only would have to buy the B6 manual. In effect that would save me $129.99 USD. In Canadian terms... $200+ by the time shipping and duty fees are applied.

2001.5 B5 S4 avant
APB 2.7t, 01E 6spd
Engine harness part # 8D1-971-074NC
.

[AudiA4_20T]

They are the same pin locations. Good luck

[chris_72]

They are the same pin locations. Good luck

The God of the 2.7t swap has spoken! So the pinout on the B5 S4 and the C5 A6 (both with the 2.7t and the O1E) are identical? Good to know. Now I gotta find a set of 03 A4 Avant diagrams. I have a set from shopkey, but they make no mention of what wires go to the "connector station electric box plenum chamber" the shopkey stuff is great if I was working on a Cavalier or Taurus... But not worth a dime on a vag product.

Gotta say - without your thread, I probably wouldn't touch this project.

And I'm also looking around the local yards for a driveshaft. B6 with a 6-speed. Not common in my neck of the woods.
That's the last piece of this puzzle. After I get my hands on that - I rip my Avant apart.

[ADCS]

You can get all the diagrams and service instructions for less than $20 on alldatadiy.com (for a year). Use code DIY2016 to get $10 off. I used this for my BEL wiring...unfortunately the wiring on the BEL is completely different from the APB so I can't really help you out there.

[ADCS]

Also, I don't know if this helps your driveshaft search but the 1.8t 6speed and the 3.0 TIP use the same driveshaft. So check the part number on yours. You may already have the correct one.

I have these in my garage:
'04 1.8t 6speed driveshaft 8E0 521 101 D
'02 3.0 TIP driveshaft 8E0 521 101 D

[AudiA4_20T]

The God of the 2.7t swap has spoken! So the pinout on the B5 S4 and the C5 A6 (both with the 2.7t and the O1E) are identical? Good to know. Now I gotta find a set of 03 A4 Avant diagrams. I have a set from shopkey, but they make no mention of what wires go to the "connector station electric box plenum chamber" the shopkey stuff is great if I was working on a Cavalier or Taurus... But not worth a dime on a vag product.

Gotta say - without your thread, I probably wouldn't touch this project.

And I'm also looking around the local yards for a driveshaft. B6 with a 6-speed. Not common in my neck of the woods.
That's the last piece of this puzzle. After I get my hands on that - I rip my Avant apart.

Yep. Shopkey doesn't appear to be as robust as Bentley wiring diagrams. You may have a little trouble finding good tunes for the 2003, most of the common ones are 2000-2002.

[chris_72]

Hey thanks for the tip on driveshafts. I think I've got one kicking around. If not - I may try having a 1 piece made up.

And Clint, what tune are you talking about? For the 2.7? My car is a 2003 A4 but my 2.7 is from a 2001 A6.

Sorry I've been slacking. Normally the winter is nice and slow at work. But this year I've already had 4 major jobs!

[AudiA4_20T]

Hey thanks for the tip on driveshafts. I think I've got one kicking around. If not - I may try having a 1 piece made up.

And Clint, what tune are you talking about? For the 2.7? My car is a 2003 A4 but my 2.7 is from a 2001 A6.

Sorry I've been slacking. Normally the winter is nice and slow at work. But this year I've already had 4 major jobs!

Disregard then. I thought you had a 2003 engine.

[B6_A4_Kid]

Did this ever get finished up? Really curious to hear how it went!