Case Identification

Rev - Nov 25, 2017

Edited -  Jan Zumwalt (EAA #66327)

Even if the Mexico stamp was missing, by examining the case and seeing the "AS41" we know
this was a Type-2 dual-port not made in the USA, sometime between August 1973 through Dec 1980.
Any engine manufactured after August 1970 is considered a very good case for aircraft conversion

See Also

Parts Type 1-2
Parts Type 914-4
Parts Type 914-6
Case Identification

VW Porsche 356 (359 pages 9.5 mb) VW_part_catalog_356_1950_1959.pdf
VW Porsche 356 (384 pages 9.5 mb) VW_part_catalog_356_1960_1965.pdf
VW Porsche 914 (593 pages 15 mb)  VW_part_catalog_911-1_1965-1969.pdf
VW Porsche 914 (328 pages 9 mb)    VW_part_catalog_914_1976.pdf
VW type 1 & 2 (83 pages 5 mb)          VW_part_catalog_T1-T2.pdf

Case Identification

  • To determine what type of engine you have, first determine whether it is the engine single-port or twin-port (the term "dual-port" or DP is used in the US). The single-port intake manifold consists of a single tube running from head to head across under the carburetor. There are smaller diameter heat riser pipes from the muffler on either side, attached underneath the intake manifold in the center. The two sides of the intake manifold combine in the center with a tube extending upwards to a flange upon which the carburetor rests.
  • The intake manifold on dual-port engines is similar, except that the tubes split in two at each end as they turn downwards to the cylinder heads. Also, the dual-port intake manifold is in three pieces - the center section with a tube attached on either side; these run to the cylinder heads.
  • The dual-port engine first came out in 1971, but the earlier cases can be converted to dual-port, so it's not always easy to tell exactly what you have unless you know the engine's history.
  • The engine number is stamped just under the alternator/oil filler stand (under the "zunfolge 1432," which means firing order 1432 in German).
  • The first two letters (or single letter on earlier engines) will tell you what the engine started out as, but of course it could be different now and sometimes the only way of checking is to remove a cylinder head and measure the bore and stroke. But at least the engine letters will give you a clue. Chassis and engine numbers do not necessarily match for the same year, VW always built more engines than chassis (for replacements)

The following table gives a summary of engine types, numbers and horsepower over the years. In the tables below "Code" refers to the first 1 or 2 digits of the engine number.

Displacement Code Horsepower
Dec. 1953 through July 1960 1200cc 1, 2, 3 36
August 1960 through July 1965 1200cc 5, 6, 7, 8, 9 40
August 1965 through July 1986 1200cc D (not to US) 40
August 1965 through July 1966 1300cc FO 50
August 1965 through July 1970 1300cc E low comp 37
August 1966 through July 1967 1500cc HO 53
August 1967 through July 1969 1500cc H5 low comp 50
August 1967 through July 1970 1500cc L (smog) 50
August 1969 through July 1970 1500cc H1 (outside USA) 53
August 1969 through July 1970 1600cc B 57
August 1970 through July 1973 1300cc AB (not to US) 48
August 1970 through July 1973 1300cc AC (not to US) 44
August 1970 through Sept. 1971 1600cc* AE 60
August 1970 through July 1973 1600cc* AF (low comp) 58
August 1971 through July 1973 1600cc* AD (not to US) 65
From August 1971 (Calif. only) 1600cc* AH 60
From Oct. 1972 1600cc* AK 46
August 1973 through July 1975 1300cc AR (not to US) 48
August 1973 through Dec 1980 1600cc* AS (not to USA?) 60
From Dec. 1974 (fuel-injected) 1600cc* AJ 60
Asterisk * denotes dual-port

*Dual-port version
The single port engines make a little less power and can only use the smaller 30 series carburetors or the modern replacement H30/31, but are considered a little more torquey, and are popular with off roaders. The dual-port engines can make a little more peak hp as they use the larger 34PICT/3 carburetor.

Most "stock" engine rebuilds these days use 1600cc pistons and cylinders (P&C)s, as these are readily available and will also fit straight into the 1300cc and 1500cc cases, without any need to change anything but the heads (even these can be left original if you can live with the higher than normal compression ratio). Smaller P&Cs are very difficult to find these days. SO most VW rebuilt engines now are at least 1600cc. Then there are the oversized P&Cs and stroked crankshafts which will give a range of new capacities -- 1641cc, 1776cc, 1835cc, 1916cc and so on up to about 2235cc. Anything bigger than 1776 will probably have a larger (non-standard) carburetor or twin carburetors, as the engine won't breath well on large capacity with the smaller Solex carburetors.

In the tables below "Code" refers to the first 1 or 2 digits of the engine number. Corrections or additions welcome.

Type 1

Code Year Engine/Notes
1- Pre-Jan., 1956 25hp/36hp
1- prefix indicates Type 1 and is not part of the sequential engine number.
2, 3, 4 1955-65 1200cc 30bhp DIN, 36HP SAE (“A” series engine)
5, 6, 7, 8, 9 1961-65 1200cc 34bhp DIN, 40HP SAE (“VW D” added below serial after 9247364)
D0, D1 1966-1985 1200cc 34bhp DIN, 40HP SAE For Mexican made 1200s after 1977.
E0 1966-1970 1300cc 37bhp DIN. Non-USA M240 low compression
F0, F1, F2 1966-1970 1300cc 40bhp DIN, 50HP SAE (only 1966 in USA, 66-70 elsewhere)
H0, H1 1967-1970 1500cc 44bhp DIN, 53HP SAE (only 1967 in USA, 67-70 elsewhere)
H5 1968-69 1500cc 44bhp DIN, 53HP SAE M157 USA/Canada.
B6 1970 1600cc Dual relief, single port, 47bhp DIN, 57HP SAE M157 USA/Canada.
L0 1967-1970 1500cc 40bhp DIN. Non-USA M240 low compression
NOTE: all the following 1971-up engines are dual relief and dual port.
AB 1971-73 1300cc 44bhp DIN, Non-USA.
AC 1971-72 1300cc 40bhp DIN, Non-USA M240 low octane
AE 1971 1600cc 50bhp DIN, 60HP SAE-gross. USA-only
AE 1972-73 1600cc 48bhp DIN, 48HP SAE-net. USA-only (compression ratio reduced)
AF 1971-1982? 1600cc 46bhp DIN, Non-USA M240 low octane.
AH 1973-74 1600cc 48bhp DIN, 46HP SAE-net. USA-only
AK 1973 1600cc 48bhp DIN, 46HP SAE-net. USA-only
AJ 1975-79 1600cc 50bhp DIN, 48HP SAE-net. Fuel Injected.
AR 1974-75 1300cc 44bhp DIN. Non-USA.
AS 1974-79 1600cc 50bhp DIN. Non-USA.
ACD 1992-2004 1600cc 46bhp DIN. Mexico. Fuel Injected.


Type 2

Code Year Engine/Notes
20- Pre-Jan., 1956 25hp/36hp
20- prefix indicates Type 2 and is not part of the sequential engine number.
2, 3, 4 55-60 1200cc, 36hp (includes “Bastard 40hp”)
5, 6, 7, 8, 9 1961-65 1200cc, 40hp
O 1963-65 1500cc - no cam bearings
H0 1966-67 1500cc
L0 1967 1500cc M240 low compression
B0 1968-70 1600cc non-USA.
B5 1968-69 1600cc single relief USA only
B5 1970 1600cc dual relief USA only
C0 1968-70 1600cc 44bhp. Non-USA. M240 low octane.
AD 1971-73 1600cc 50bhp DIN. Non-USA.
AE 1971 1600cc 50bhp DIN, 60HP SAE-gross. USA-only
AS 1974-79 1600cc 50bhp DIN. Non-USA
CB 1972/73 1700cc - dual carb., manual transmission
CD 1973 1700cc - dual carb., automatic transmission
AW 1973/74 1800cc - dual carb.
AW 1975 1800cc - fuel-injected
AP 1974/75 1800cc - European only
ED 1975 1800cc
GD 1976/77 2000cc
CJ 1976-1979 2000cc - European only
GE 1978/79 2000cc
CU 1980-1983 2000cc - Vanagon style
CV 1980-1983 2000cc - Vanagon style


Type 3

Code Year Engine/Notes
O 1961-65 1500cc
K0 1966-1972 1500cc - 54hp
M0 1966-1972 1500cc - M240 low compression 52hp
P0 1966/67 1600cc - M240 low compression 50hp
T0 1966-1973 1600cc
U0 1968-1973 1600cc - fuel injected for USA
U0 1970 1600cc - dual-relief case
U5 1971-1973 1600cc - 7.7:1 compression - US/Canada M239 California fuel-injection
X 1972 1600cc - 7.3:1 compression - California


Type 4

Code Year Engine/Notes
V 1969 1700cc - 68hp
Z 1969/70 1700cc - 7.8:1 compression - 68hp, dual carb., automatic transmission
W 1971 1700cc - 8.2:1 compression - 80hp
EA 1972-1974 1700cc
EB 1973 1700cc - California only, fuel injection
EC 1974 1800cc
AN 1974 1800cc - 8.6:1 compression
AT 1974 1800cc - European only, dual carb.

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