How to identify 16V head types

[Baldwin02002]

Hi, i dont know if sombody posted this. I thought this will help somebody. The reason why i am posting this is i was looking for an ABF head and guys have been advertising different heads as ABF on the net where as is not. This are the codes i found up to so far but will keep on updating

KR:

051 103 373 ---> KR (großer Wasserkanal) 051 103 373 ---> KR (large water channel)
027 103 373 027 103 373
027 103 373 E 027 103 373 E
027 103 373 F 027 103 373 F

PL:

027 103 373 027 103 373
027 103 373 E 027 103 373 E
027 103 373 F 027 103 373 F

9a:

051 103 373 051 103 373
051 103 373 A im 9a bis Motornr. 051 103 373 A in 9a to engine no. 131.461 (hatte ich mal VW genervt, da ich so nen Kopf rumzuliegen habe) 131 461 (I once had VW annoyed because I have so NEN rumzuliegen head)
051 103 373 D 051 103 373 D

ABF

051 103 373 D von nem 93er Golf GTI 16v 051 103 373 D by nem '93 Golf GTI 16v
051 103 373 DF (97er Seat Ibiza GTI) 051 103 373 DF ('97 Seat Ibiza GTI)

051 103 373 "O" oder "0"; konnte mir VW nicht 100% sagen 051 103 373 "O" or "0"; could not tell me VW 100%

Audi 89 16v MKB ACE Audi 89 16v MKB ACE

051 103 373 A A 051 103 373

[Golfie.NC]

Can anyone help with this number 051103373, thats all on the head but how would i know for sure if it's a kr?

[kylebassani]

This is awesome! Thanks

Sent from my SM-G930F using Tapatalk

[Baldwin02002]

Below is what i found from Club GTI:

1.8 heads have better intake ports (051) and (053) heads have better exhaust ports.

There are 4 16v valve head castings:

Part no* Engine code
051 103 351 KR,PL NB the KR,PL and ADL are all 1781cc the rest are 1984cc
053 103 351 6A,9A and later KRs
053 103 351 B ACE,ADL and early ABFs
053 103 351 C ABF and Late ACE

* Found on front of head.

Early Castings 051 103 351, 053 103 351 1986-1995
What makes the KR the most revvy 16v all other factors equal, is the intake cam which is 027 109021AH which has extended duration compared to the cams found in the PL,9A,and 6A which is 027109021AL. The exhaust cam is the same on all of these listed as pt# 027109022G.

Later Castings 053 103 351 B, 053 103 351 C 1992-2000
Again the ABF was the most powerful of the lot part due to the intake cam amongst other things. I got the part no as 051 109 021 B for the ABF motor where as the rest including the 1.8 ADL engine used 051 101 921 C for the intake cam. Exhaust cam on all was listed as 051 109 022 B.

I have never been able to compare valve sizes between the various heads but careful study of the part numbers shows that KR, PL and 6A motors have the same inlet and exhaust part numbers of 027 109 601 C and 027 109 611 B respectively and the other engines got 051 109 601 B for intake and 051 109 611 B for exhaust. If any of you know more data about this pls dont hesitate to correct.

Hope my 2p helps.