Identification of Air Cooled VW Engine letter codes

Engine ID Codes
VW stamped all type 1’s and pre ‘72 type 2’s on the right case half just below the generator pedestal.

The first and sometimes the second digit/letter denotes the basic engine group.
So the best you can do is narrow down the engine to a group.
Here are the groups

Type 1 Code - Year -Engine – Remarks
4 – 60 – 1200 – 40 HP
5 – 61 – 1200 – 40 HP
6 – 62 – 1200 – 40 HP
7 – 63 – 1200 – 40 HP
8 – 64 – 1200 – 40 HP
9 – 65 – 1200 – 40 HP
FO – 66 – 1300 – 8mm oil pump studs
HO/TO- 67 – 1500 – 8mm oil pump studs
H5 – 68-69 – 1500 – 8mm oil pump studs
B6 – 70 – 1600 – Dual Relief – single port
AE – 71-72 – 1600 – Dual Relief – Dual Port
AH – 73-74 – 1600 – 8mm Head studs w/case savers
AJ – 75 – 1600 – Fuel injected, no fuel pump mount.

Type 2
Code - Year -Engine – Remarks

Numerals 61-63 – 1200 – See type 1 40 HP
O  – 64 – 1500 – No Cam bearings
H  - 65 – 1500
HO – 66-67 – 1500 – No Cross member holes
B5 – 68-69 – 1600 – 8mm oil pump studs, single port
B5 – 70 – 1600 – Dual Relief
AE – 71 – 1600 – W/cross member holes

Late Bus
CB  - 72-73 – 1700 – Dual carb, manual trans
CD  - 73 – 1700 – Dual carb, auto trans
AW – 73-74 – 1800 – Dual carb, manual or auto
AW – 75 – 1800 – Fuel injected
ED  – 75 – 2000
GD  - 76-79 – 2000 – 79 had Vanagon heads
GE  - 79 – 2000 – Cal only, Vanagon heads

Type 3
Code -Year -Engine -Remarks
O   - 63-65 – 1500 – No Cam Bearings
TO – 66-67 – 1500 – 6mm oil pump studs
UO – 68-69 – 1600 – Fuel injected ‘69 w/xmember holes
UO – 70 – 1600 – xmember holes, dual relief
U5 – 71-73 – 1600 – like UO w/xmember holes 7.3:1 compression
X   - 72 – 1600 – 7.3:1 compression

After Market Cases
Code -Year -Engine -Remarks

F1 – 13/1600
F2 – 13/1600
DO – 40-HP part when last digit is “X”
D1 – Some times a 40-HP part
AB – 66-79 – 1600 – Built since ‘73 in Mexico, Brazil and Germany
AK – 67-74 – 15/1600
AM – 1600
AS – sometimes listed as a Super Beetle original case ‘73 and later.

Type 4
Code -Year -Engine -Remarks
W – 71 – 1700
EA – 72-74 – 1700
EB – 73 – 1700 – Calif only
EC – 74 – 1700

Author: jcchirco@gmail.com on September 21, 2009
Category: Engine and Trans, ID and Charts
Tags: ,

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