Air Cooled VW Engine ID Codes

Engine ID CodesVW 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 groupsType 1Code Year Engine Remarks4 - 60 - 1200 - 40 HP5 - 61 - 1200 - 40 HP6 - 62 - 1200 - 40 HP7 - 63 - 1200 - 40 HP8 - 64 - 1200 - 40 HP9 - 65 - 1200 - 40 HPFO - 66 - 1300 - 8mm oil pump studsHO/TO- 67 - 1500 - 8mm oil pump studsH5 - 68-69 - 1500 - 8mm oil pump studsB6 - 70 - 1600 - Dual Relief - single portAE - 71-72 - 1600 - Dual Relief - Dual PortAH - 73-74 - 1600 - 8mm Head studs w/case saversAJ - 75 - 1600 - Fuel injected, no fuel pump mount.Type 2Code Year Engine RemarksNumerals 61-63 - 1200 - See type 1 40 HPO - 64 - 1500 - No Cam bearingsH - 65 - 1500HO - 66-67 - 1500 - No Cross member holesB5 - 68-69 - 1600 - 8mm oil pump studs, single portB5 - 70 - 1600 - Dual ReliefAE - 71 - 1600 - W/cross member holesLate BusCB - 72-73 - 1700 - Dual carb, manual transCD - 73 - 1700 - Dual carb, auto transAW - 73-74 - 1800 - Dual carb, manual or autoAW - 75 - 1800 - Fuel injectedED - 75 - 2000GD - 76-79 - 2000 - 79 had Vanagon headsGE - 79 - 2000 - Cal only, Vanagon headsType 3Code Year Engine RemarksO - 63-65 - 1500 - No Cam BearingsTO - 66-67 - 1500 - 6mm oil pump studsUO - 68-69 - 1600 - Fuel injected 69 w/xmember holesUO - 70 - 1600 - xmember holes, dual reliefU5 - 71-73 - 1600 - like UO w/xmember holes 7.3:1 gepresionX - 72 - 1600 - 7.3:1 gepresionAfter Market CasesCode Year Engine RemarksF1 - 13/1600F2 - 13/1600DO - 40-HP part when last digit is "X"D1 - Some times a 40-HP partAB - 66-79 - 1600 - Built since 73 in Mexico, Brazil and GermanyAK - 67-74 - 15/1600AM - 1600AS - sometimes listed as a Super Beetle original case 73 and onType 4Code Year Engine RemarksW - 71 - 1700EA - 72-74 - 1700EB - 73 - 1700 - Calif onlyEC - 74 - 1700