I can't tell what kind of motor, it was not in my bug.

number found under generator bracket

AES520018

I have pics on a piczo account under

http://myvw-bug.piczo.com/?cr=3

a couple of pics of motor and the number

Any help PLEASE, can't rebuild till I find out what it is..................

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, 5, 6, 7, 8, 9 55-65 1200cc, 36hp/40hp
D0 1966/67 1200cc
F0 1966/67 1300cc
H0 1967 1500cc
F1 1967 40hp
E0 1967 M240 low compression 37hp
L0 1967 M240 low compression 40hp
H5 1968/69 1500cc
B6 1970 1600cc - dual relief, single port
AE 1971/72 1600cc - dual relief, dual port
AH 1973/74 1600cc - 8mm head studs with case savers
AJ 1975-1979 1600cc - fuel injected

This engine is a 1600cc twin port dual oil pressure release valve. I think you have misread the engine number , what you think is S is an 8 ie AE8520018