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View Full Version : b6 heart on b5 yay or nay?



Oravla
07-28-2014, 08:42 PM
so i have the1.8t AWM late 01 quattro manual trans. and my friends got a 04 1.8t with 35k miles on it on their shop... the owner gave up the car because was totaled and they kept the car.

they said if i want i could keep the engine and put it in my B5 since its very similar and has everything to do the swap...

now the big question is is the B6 1.8T better than the B5?

is it worth doing the swap?

will it fit?

has anyone done it before?

nynoah
07-28-2014, 08:45 PM
whats the engine code?

GrapeBandit
07-28-2014, 08:48 PM
if theres nothing wrong with your engine now I say its a big waste of time. maybe just pull out the b6 engine/tranny and keep it stowed away for when you do need it

nynoah
07-28-2014, 08:50 PM
B6 tranny is not as easy to put in as people say. There is a problem getting the B5 speed sensor to work from what I know. Otherwise I would be running that 6 speed from the B6.

GrapeBandit
07-28-2014, 08:55 PM
so op should just pull the engine/tranny and sell it tk make a few bucks.

redline380
07-28-2014, 08:57 PM
people keep forgetting the thermostat's on b6's are different.

Other than that, no, there is zero benefit to doing the swap notwithstanding mileage/condition factors

Oravla
07-28-2014, 09:02 PM
i believe the engine is an AWP. what got my attention and curiosity was the low millage compared to my already fixed over 150k miles engine...

redline380
07-28-2014, 09:06 PM
i believe the engine is an AWP. what got my attention and curiosity was the low millage compared to my already fixed over 150k miles engine...


We need specifics. As far as I know, AWP's are only out of transverse VW applications, which will work dandy. I'm pretty sure any b6 uses an AMB engine, which has a thermostat setup that is not compatible with a 2001. It could work, but more trouble than it is worth.

Oravla
07-28-2014, 09:09 PM
uhmmm ok i will see it tomorrow because the car is in my friends shop and dont recall the exact code.

walky_talky20
07-28-2014, 09:19 PM
Don't bother with the code. It's an AMB.

I think you would need some slight machining of the thermostat location to make things work properly. Other than that, everything just bolts up and plugs in. Granted you would be swapping over your accessories, brackets, oil pan, etc.

But yeah. "Bolts right up".

redline380
07-28-2014, 09:27 PM
Don't bother with the code. It's an AMB.

But he said B6 and AWP. Those two don't go together. Maybe his B6 got an AWP in it at some point in time? Or an AWP head at least? That would be very plausible. The block is most assuredly AMB, though.

Oravla
07-28-2014, 09:29 PM
Don't bother with the code. It's an AMB.

I think you would need some slight machining of the thermostat location to make things work properly. Other than that, everything just bolts up and plugs in. Granted you would be swapping over your accessories, brackets, oil pan, etc.

But yeah. "Bolts right up".

yes pretty much i was planing on transferring everything from the b6 to the b5... sensors, hoses, accessories, oil pan etc etc i just read somewhere taht the turbo on the b6 is very close to the performance of a K4 or its easier to upgrade i dont remember but was one of them.

nynoah
07-28-2014, 09:31 PM
Honestly, the AWM b5 is just as upgradeable as the B6. Its a B6 motor in a B5 and best of all no immobilizer. Immobilizers suck!

redline380
07-28-2014, 09:31 PM
yes pretty much i was planing on transferring everything from the b6 to the b5... sensors, hoses, accessories, oil pan etc etc i just read somewhere taht the turbo on the b6 is very close to the performance of a K4 or its easier to upgrade i dont remember but was one of them.

Again, I am pretty sure the B6 turbo is exactly the same as the AWM turbo. If it isn't exactly the same, it is close enough to make zero difference.

redline380
07-28-2014, 09:32 PM
Honestly, the AWM b5 is just as upgradeable as the B6. Its a B6 motor in a B5 and best of all no immobilizer. Immobilizers suck!


He speaks the truth. AWM's are without a doubt the best B5 motors, along with the ecu's and revision to the cars. You won't get anything by going to an AMB engine unless you need it to replace a bad AWM

Oravla
07-28-2014, 09:34 PM
Ok. Thank you for all the info, another question.... are there any parts worth replacing from that engine to the awm? Like manifold? Turbo? Sensors etc etc?

nynoah
07-28-2014, 09:35 PM
Perhaps the turbo would be a good replacement? Hell if your friend is going to let you have it, just get it and sell it.

redline380
07-28-2014, 09:37 PM
There is nothing of an upgrade. The two engines are incredibly similar. Like nyoah said, maybe the turbo if its in better shape than yours.

walky_talky20
07-28-2014, 09:49 PM
The turbo is identical to yours (but with less miles). All North American A4 and Passat 1.8T's from 2000 up got the K03-029 (aka "K03s") turbo. That's ATW, AWM, and AMB. All the same turbo.

In Europe, some of the B6's got a "BEX" engine that has a K03 that is very nearly a K04. It is a K03-073 if I recall correctly. North America never got that turbo.

fed0ra
07-29-2014, 08:51 AM
The turbo is identical to yours (but with less miles). All North American A4 and Passat 1.8T's from 2000 up got the K03-029 (aka "K03s") turbo. That's ATW, AWM, and AMB. All the same turbo.

In Europe, some of the B6's got a "BEX" engine that has a K03 that is very nearly a K04. It is a K03-073 if I recall correctly. North America never got that turbo.

I believe the ATW has the old K03, not the 029.

redline380
07-29-2014, 09:02 AM
I believe the ATW has the old K03, not the 029.


http://www.audi-sport.net/vb/a3-s3-forum-8l-chassis/5970-facts-about-k03-turbo.html

fed0ra
07-29-2014, 09:28 AM
http://www.audi-sport.net/vb/a3-s3-forum-8l-chassis/5970-facts-about-k03-turbo.html

That is only for transverse turbos, not the longitudinal ones.