Horizontal VS Transverse 2.0TFSI Motors

[edhogan1224]

The motor in my '06 B7 A4 Quattro Tip let go, and i picked up a FWD 2.0t (unsure of the engine code). I've barely got the motor on the stand when i start noticing differences. I've googled and haven't been able to find much. What are the differences between these two motors? What has to be swapped over? I'm running on the assumption that the block and head are identical, is that correct?

[james12lucy]

First, start with engine codes from both engines. We need to know what you had and what you're now working with. There will be minor things. You'll likely need to swap most of the engine accessories and oil pickup. You'll also notice that the crank output shaft from a tiptronic car and manual/CVT are different.


Sent from my iPhone using Tapatalk

[edhogan1224]

The sticker on the front of the new engine says its a BPG motor. I'm fairly certain that the crank output is conical, which from what i can tell means that its originally from a manual/cvt car. I've read that i can use a manual/cvt crank on a tip trans without modification just a different pilot bearing, but not the other way around.

[edhogan1224]

At work right now, but these are the pics i have of the new motor

[james12lucy]

You'll have to swap the turbo/manifold, intake manifold, oil pickup, coolant lines, etc. Great news about the crank working.

The BPG has forged pistons, so you're good there. They also have the original butter soft intake cam. You'll likely want to ensure you have the latest revision cam. All in, the long black is the same.


Sent from my iPhone using Tapatalk

[Charles.waite]

BPG is a longitudinal Audi engine. BPY is the Transverse VW (and A3) engine. You sure its BPG?

They're pretty much the same though. You'll just need to swap the accessories.

[Okedokey]

I have a K04 given to me for a transverse engine. Can I just cut off the turbo outlet pipe some to allow for routing to the intercooler or is that not a good idea?

[edhogan1224]

Its hard to see in the pictures i posted, but the sticker on the timing cover definitely says BPG. I could be wrong about it being a fwd motor, but the one in my A4 has several significant differences. I.e. coolant (?) hardlines running on top of the heat shield over the exhaust, the engine cover mounts are completely different and seem to be angled towards the intake, the intake tube for the throttle body comes down and goes towards the flywheel. All of which lead me to infer that this is a fwd motor

[Charles.waite]

I have a K04 given to me for a transverse engine. Can I just cut off the turbo outlet pipe some to allow for routing to the intercooler or is that not a good idea?

You'd have to relocate the diverter valve too.

[Okedokey]

You'd have to relocate the diverter valve too.

Yeah thats fine, I have the gear for that, but is there any issue cutting off the outlet pipe so i can fit it? Ie can i cut where the red lines are?

[Charles.waite]

Its hard to see in the pictures i posted, but the sticker on the timing cover definitely says BPG. I could be wrong about it being a fwd motor, but the one in my A4 has several significant differences. I.e. coolant (?) hardlines running on top of the heat shield over the exhaust, the engine cover mounts are completely different and seem to be angled towards the intake, the intake tube for the throttle body comes down and goes towards the flywheel. All of which lead me to infer that this is a fwd motor

Given the pictures, it absolutely looks like it's a transverse so the engine code is sort of irrelevant. It should be more or less plug and play but you might need to swap some electrical sensors, and stuff like fuel lines and possibly even injectors (though hose are probably the same). The turbo might need to be swapped too, or just the compressor housing at the very least. The engine wiring harness obviously won't work either, you'll need to use your A4s harness.

[edhogan1224]

So, quick update now that I'm actually into the swap. The crankshafts are different, the output on the og engine is a flat boss, where the new engine has a conical output. The harnesses on the injectors and knock sensors are different. The fuel lines are different. The oil pan is different.

[aluthman]

There is a stamp on the back driver side of the block that will tell you the actual engine code. Either the timing belt cover was swapped or someone put a longitudinal engine in a transverse car. As mentioned before, you need to swap the turbo, accessories, oil pan and oil pickup.

[vce1232000]

Also the pilot bearing needs to be removed before you the flexplate

[edhogan1224]

There is a stamp on the back driver side of the block that will tell you the actual engine code. Either the timing belt cover was swapped or someone put a longitudinal engine in a transverse car. As mentioned before, you need to swap the turbo, accessories, oil pan and oil pickup.

Ill have to check that and see what that turns up. I wasn't expecting to have differences in wiring or differences in the cranks.

Also the pilot bearing needs to be removed before you the flexplate

I have to make a new pilot bearing and grind the conical section off the new crank in order for it to work.

[edhogan1224]

Stock original B7 A4 2.0tfsi Quattro Tiptronic Crankshaft output.



Unknown (BPG?) Crankshaft output.
This has been partially ground down to match up to the original crankshaft (above). The bore for the pilot bushing diameter is different (bigger in original crankshaft). Good news is that where the bevel ends on the crank is the same height as the flat face on the original crankshaft.



All ground down and ready for the custom pilot bushing.



Sent from my SM-G955U using Audizine mobile app

[edhogan1224]

B7 A4 engine injector/knock sensor/cam position sensor harness.



Unknown (BPG?) Injector/cam position sensor harness. No knock sensors in this bundle like on the B7 A4. Also notice the pin count of the connectors. These have fewer pins in both connectors than the original B7 A4 harness.



Sent from my SM-G955U using Audizine mobile app

[vce1232000]

I a manually B7 A4 2.0T into my tiptronic without any modification to the crank. All I did was removed the pilot bearing from the crank. I guess the fwd 2.0T are different

[edhogan1224]

I a manually B7 A4 2.0T into my tiptronic without any modification to the crank. All I did was removed the pilot bearing from the crank. I guess the fwd 2.0T are different

Yeah, im not sure what exactly i have here. Ill post pictures of the turbo differences if i get a chance tonight.

[edhogan1224]

Some carnage pics if anyone's interested. Oil pickup screen got clogged, oil starved head, intake cam siezed in the last journal.

Sent from my SM-G955U using Audizine mobile app

[edhogan1224]

Checking machined pilot bushing for length


Ground down pilot bushing flush with the ground down section of the crank


Flywheel, trans plate, and shims torqued down. Probably could've taken a bit more off of the end of the crank, but it'll work.


And after some cursing and wiggling, motor slipped right into place.


As a side note, the exhaust bolt pattern on the BPY (new) engine was different than the bolt pattern on the original B7 A4 engine.

Sent from my SM-G955U using Audizine mobile app

[Charles.waite]

Yea the transverse turbos have a slightly different flange.