B6 A4 1.8t engine swap question

[mfallon]

I have a 2005 Audi A4 Quattro Avant. It has a blown 1.8t AMB motor in it. I found a wrecked 2001 Audi A4 Quattro with an AWM motor in it that runs fine. My question is this: Can I swap a B5 AWM 1.8t into my B6 A4?

I was hoping to just swap the motor, wiring harness, and ecu out of the wrecked B5 and put it into my car. Would this work? My car has a 6spd tranny in it and the B5 has a 5 spd tranny. Would I need to swap trannys as well? Or could I get by with just the engine, harness, and ecu?

Also, is there anything else I should be aware of before I check out the B5 A4 today?

[onceover]

Why would you want to swap all of the B5 wiring and electrical? Just swap the motor and be done with it. Keep all of the B6 electrical components. 6 speed can stay.

[mfallon]

Well I was having electrical issues previous to the engine blowing. And I have just confirmed that it has a bad ecu. So just to be safe I was thinking about swapping everything...

So could I just swap the engine and ecu and keep my harness? I'm not sure if everything is plug n play between the two motors?

[mfallon]

Also, the b5 AWM ecu has APR stage 1 software on it. That wouldn't affect anything being put into my car with the 6spd tranny would it? Or anything else for that matter?

[CyberPMG]

ECU will likely not be able to recognize a 6 speed manual transmission as the older 1.8T engine never had one. You'll also have immobilizer issues. There's plenty of used 1.8T AMB engines, wire harnesses, and ECUs out there. For ECUs, you would want to make sure the ECU is the same year as your car for easier integration. I would skip the B5.

[mfallon]

Thanks for the info! Can anyone verify this?

[crazyquik22023]

I am pretty sure an 01 AWM harness and an AMB harness are exactly the same assuming they are both manual trans. Like said above swapping the ecu will be difficult because of the immobilizer. Your best bet would be to use the AMB ecu and the AMB harness and swap in the AWM engine.

[mfallon]

Okay, I think after getting all the feedback I will just hold out and try and find a b6 to swap from.

[redline380]

Why would you swap everything? Just swap the motor and be done.

Harnesses are different- b5's use tranny for speedo, b6's use wheels.

[mfallon]

Is that the only difference?

So I would be able to use the wheels still for my sensor and just wouldn't plug into the speed sensor on the tranny correct?

[redline380]

Is that the only difference?

So I would be able to use the wheels still for my sensor and just wouldn't plug into the speed sensor on the tranny correct?

lol, b6's use the hub at the wheels for speedo, not some special wheel contraption thing.

[mfallon]

So nothing would change for plugging into my wheels for speedo. What other differences are there? Are all of the connectors going to match up with the b5 motor? Anything I would have to do to make this work? Motor is going to run fine off of my b6 ecu?

[redline380]

Just put the motor in. The long block only. You will be fine.

[mfallon]

Have you done a similar swap?

[redline380]

Have you done a similar swap?

No, I haven't.

But one thing no one has mentioned yet is if your car is a manual, the motor has to come from a manual.

[mfallon]

Yes I am aware of that. Mine is a 6spd manual transmission. The b5 I'm looking at is a 5spd manual transmission.

And I'm only asking if you've done a swap like this is because I'm still making payments on mine with the blown motor . So money is a little tight and I want to be 100% sure it will work and that I'm aware of everything before I spend any money..

Has anyone actually done this swap???

[redline380]

Has anyone actually done this swap???

It isn't a "swap." It is motor for motor.

[mfallon]

Technically I am swapping one motor for another...

But I'm not here to argue symantics. Just looking for answers.

[onceover]

Any 06a 1.8t long block will fit, whether it's from a Jetta, golf, Passat or a4. Use all the original accessories. Ecu doesn't care about 5 vs 6 speed at long as they're both from a manual car.

I swapped an 06a shortock from a Jetta into my car and mated it to a AMB head from a b5 a4. Works just fine.

[diagnosticator]

The ECU is coded for manual trans, there is no coding difference between 5 or 6 speed trans. 6 speed trans are installed in originally 5 speed cars using the same ECU. Don't try and use a B5 engine harness in a B6. Just use the existing B6 harness. A B5 engine will run fine on the B6 ECU.

[mfallon]

Thanks, that info is most helpful. I'll think if over and let you know which route I go.

[diagnosticator]

Also, the b5 AWM ecu has APR stage 1 software on it. That wouldn't affect anything being put into my car with the 6spd tranny would it? Or anything else for that matter?

The B5 AWM ECU is irrelevant since you must use the B6 8E0 ECU, the B5 8D0 ECU cannot be used in your B6.

If you need to obtain a used replacement ECU, PN 8E0 919 518 AF or AK, You can use an ECU from a Manual Trans A4 or an Auto trans A4, if an Auto trans, the ECU must be recoded to manual trans.

[DiertyEuroSpec]

Just read through this and NO you cant use the B5 harness and ECU. If you need those components I have both for sale.

Sent from my LGL33L using Tapatalk

[EuroxS4]

Ok so since I'm in the middle of the very same project let me give you some tips..The awm engine I am using came out of a automatic Passat.So depending no on where you got your engine from here are the differences.Intake and vacuum hoses under the intake are layed out differently so you either cap the unused hoses or swap over the intake with all the hoses,fuel rail and so on from the Amb that's what I did if you do not the air intake tem sensor is different FYI.Crank pulleys are different swap right over.oil pans are different,not sure how n the oil pump pick up I didn't get that far.Also awm the thermostat is different. And the block is not machined to accept the map controlled thermostat you will need to carefully dremel out some material on the block or modify the thermostat housing The awm doesnt have a j plug.Swap it over.Coolant hoses and lines use from Amb.If your awm came from an automatic and your car is stick you will need to install a bearing in the crank.Awm valve cover has 1 extra vent port at the rear this you can plug or swap over the fitting from a Amb valve cover.accessories bracket needs to be swapped over from Amb.Everythng else is the same.I still need t check if I need to swap over oil pump pickup or not.Hope this helps.

[EuroxS4]

engine does not have to come from a manual car this was only true for AEB engine code.

No, I haven't.
But one thing no one has mentioned yet is if your car is a manual, the motor has to come from a manual.

[johnsongti]

I have an amb from a b6 for sale. It's still in car but I'm going to pull it once I get a sale. Pm me if you are interested. I'm in Delaware.
Cris

[csosnowski]

I'm curious how the MAP controlled thermostat will be addressed?

The opening in the AWM block has to be modified to accommodate the depth/diameter of the AMB thermostat. I would like to see this, I have a couple 06A blocks floating around that id like to repurpose for my B6.

[onceover]

I'm curious how the MAP controlled thermostat will be addressed?

The opening in the AWM block has to be modified to accommodate the depth/diameter of the AMB thermostat. I would like to see this, I have a couple 06A blocks floating around that id like to repurpose for my B6.

I didnt modify mine. Just snugged the thermostat up until it seated. There was about 1/8" gap between the housing and block. Never had issues. Be sure to use loctite

[csosnowski]

I didnt modify mine. Just snugged the thermostat up until it seated. There was about 1/8" gap between the housing and block. Never had issues. Be sure to use loctite

That's the stuff I like to hear!

[DaytonCarCare]

I have a 2005 Audi A4 Quattro Avant. It has a blown 1.8t AMB motor in it. I found a wrecked 2001 Audi A4 Quattro with an AWM motor in it that runs fine. My question is this: Can I swap a B5 AWM 1.8t into my B6 A4?

I was hoping to just swap the motor, wiring harness, and ecu out of the wrecked B5 and put it into my car. Would this work? My car has a 6spd tranny in it and the B5 has a 5 spd tranny. Would I need to swap trannys as well? Or could I get by with just the engine, harness, and ecu?

Also, is there anything else I should be aware of before I check out the B5 A4 today?

Just wondering if you ever completed this swap and have any notes or issues with it if it was completed?