2.0 TFSI engine code differences

[Pesky jones]

Be good to get some solid facts.

AXX - 2.0 TFSI is born 

BWA - Same block and internals as AXX, but different pistons... weaker or stronger? Revised HPFP. Some, but not all (?) have revised inlet cam shafts

BYD - 4 bolt main caps, different pistons/rods (iirc) due to lower compression, different cyl head material, K04-061 turbo, front mounted DV, plus some other shat!

BWJ -
BHZ -
CDL -

Fill in the blanks :)

[pudding]

Good idea!

BYD - 4 bolt main caps, different pistons/rods (iirc) due to lower compression, different cyl head material, K04-061 turbo, front mounted DV, plus some other shat!

[Shoduchi]

You can find a similar post on vwvortex or some other golf mk5 forum. When I have some time I'll check it again.

[pudding]

I'm sure I've read CDL (same as BYD, but S3 if I'm not mistaken) has more aggressive cams.

It seems to be the THE engine to have going by the Facebook group comments.

[AJP]

I remember a long chat at Statller a while ago and I'm pretty sure Steve mentioned the CDL having a stronger block than the lower output k04 engines. Different webbing etc.

[Shoduchi]

Yes, the intake cam of the CDL has a larger lobe compared to the BYD. The AXX/BWA have a bit smaller lobe compared to the K04 engines too.

AFAIK the CDL head flows better as well.

[GTIEagles]

Some AXX engines have the rev b cams as does mine.

[Shoduchi]

This is what I've gathered from ETKA.

AXX/BWA (200 CV)
BYD (230 CV)
BWJ (240 CV)
BHZ (265 CV)
CDL (270 CV)

Cylinder head:
AXX/BWA - 06D 103 351 D and 06F 103 265 BX
BYD/BWJ/BHZ - 06F 103 351 F to 06F 103 265 DX
CDL - 06F 103 351 to 06F 103 265 EX

Piston:
AXX - 06D 107 066 D
BWA - 06D 107 066 C
BYD/BWJ/BHZ - 06D 107 066 K
CDL - 06D 107 066 L to S

Connecting rod:
AXX/BWA - 06D 198 401 E
BYD/BWJ/BHZ/CDL - 06F 198 401 to 06D 198 401 G

Bolt connecting rod:
AXX/BWA - WHT006219
BYD/BWJ/BHZ/CDL - WHT001319

Crankshaft:
AXX/BWA/BYD/BWJ/BHZ/CDL - 06A 105 021 AR to 06A 105 021 BP

Camshaft intake:
AXX/BWA - 06F 109 101 B 
BYD/BWJ/BHZ - 06F 109 101 G
CDL - 06F 109 101 H to K

Camshaft exhaust:
AXX/BWA - 06F 109 102 B
BYD/BWJ/BHZ/CDL - 06F 109 102 D to F

Crankcase housing:
AXX/BWA - 06F 103 011 F
BYD/BWJ/BHZ/CDL - 06F 103 011 K

Injector:
AXX/BWA - 06F 906 036 A
BYD/BWJ/BHZ/CDL - 06F 906 036 F

Turbo and manifold:
BWA - 06F 145 701 C to H
BYD/BWJ/BHZ/CDL - 06F 145 702 C

Air box:
AXX/BWA - 06F 133 837 AH
BYD - 06F 133 837 AJ
CDL - 06F 133 835 K

Air filter:
AXX/BWA - 06F 133 843 A
BYD/BWJ/BHZ/CDL - 06F 133 843 B

Intercooler:
AXX/BWA/BYD/BWJ - 1K0 145 803 A to S to T
BHZ - 1K0 145 803 P
CDL - 1K0 145 803 BP to 3AA 145 805 C

Intake manifold:
AXX/BWA/BYD/BWJ/BHZ/CDL - 06F 133 201 P

Spark plug "longlife":
AXX/BWA/BYD/BWJ/BHZ/CDL - 06H 905 601 A (NGK)

Ignition coil:
AXX/BWA/BYD/BWJ/BHZ/CDL - 07K 905 715 F to G

Flywheel:
AXX/BWA - 06F 105 266 K
BYD/BWJ/BHZ/CDL - 06F 105 266 AD to AG

Clutch:
AXX/BWA/BYD/BWJ/BHZ/CDL - 06F 141 015 C

[Pesky jones]

Great to have that info here!

[Pesky jones]

Going by the part number revisions of the pistons, it would appear that BWA actually uses an earlier revision piston then the AXX...?

Also, i'm not sure but I think for the intake camshaft that some AXXs and BWAs also use the revision A camshaft. The rev B camshaft has a two piece lobe that drives the hpfp opposed to the weaker revision A one piece lobe.

[Shoduchi]

Yes, that's right. The ETKA I've used to get part numbers is free (so less complete) and I didn't check Golfs before 2006.

[Pesky jones]

I see. Wierd that the bwa pistons are an earlier revision. What makes a bwa with rev A inlet camshaft any stronger than an axx?

[Shoduchi]

I see. Wierd that the bwa pistons are an earlier revision. What makes a bwa with rev A inlet camshaft any stronger than an axx?

Nah, rev A inlet camshaft is soft and wears out. Rev B is much better.

Don't know why BWA have earlier revision pistons but as you might know BWA can't handle torque as well because the con rods bend.

[jhook661]

Can you fit CDL camshafts and valve springs on a axx engine ?

[Pesky jones]

I see. Wierd that the bwa pistons are an earlier revision. What makes a bwa with rev A inlet camshaft any stronger than an axx?

Nah, rev A inlet camshaft is soft and wears out. Rev B is much better.

Don't know why BWA have earlier revision pistons but as you might know BWA can't handle torque as well because the con rods bend.

Sorry might have worded that wrong, I was saying that as some bwas come with the weaker rev A, then if you do have a bwa with a rev a camshaft, then because the axx has revised pistons, then the bwa is no better than the axx, if anything - weaker. Which would seem contradictory to me as bwa is the revised axx.

Didnt know anything about the torque thing for bwa

Can you fit CDL camshafts and valve springs on a axx engine ?

Well, both the camshafts and the head have been revised for the cdl (as per post above) but i dont know whether the difference between the two has anything to do with the fit of the camshafts or springs. Pretty sure you can however put a cdl complete head on an axx block however. @vRSAlex could probably tell you.