MGB Engine Data, 1962-76
Engine Series Engine Number Introduction Date Head Part Number Market* Air Injection Exhaust Valve Intake Valve Intake Valve Diameter
18G
-
May-62
48G318
All
No
12H436
12H435
1.562
18GA
-
Feb-64
48G318
All
No
12H436
12H435
1.562
18GB
-
Oct-64
48G318
All
No
12H436
12H435
1.562
18GD
-
Nov-67
48G318
Not NA
No
12H2116
12H2115
1.562
18GF
-
Oct-67
48G538
USA
Yes
12H2116
12H2115
1.562
18GG
-
Oct-68
48G318
Not NA
No
12H2116
12H2115
1.562
18GH
-
Oct-68
48G538
NA
Yes
12H2116
12H2115
1.562
18GJ
-
Oct-69
48G538
CA
Yes
12H2116
12H2115
1.562
18GK
-
Aug-70
48G538
NA
Yes
12H2116
12H2115
1.562
18V
581F
Aug-71
12H2708
Not NA
No
12H2116
12H2520
1.625
18V
582F
Aug-71
12H2708
Not NA
No
12H2116
12H2520
1.625
18V
583F
Aug-71
12H2708
Not NA
No
12H2116
12H2520
1.625
18V
584Z
Aug-71
48G644
NA
Yes
12H2116
12H2520
1.625
18V
585Z
Aug-71
48G644
NA
Yes
12H2116
12H2520
1.625
18V
672Z
Aug-72
48G644
NA
Yes
12H2116
12H2520
1.625
18V
673Z
Aug-72
48G644
NA
Yes
12H2116
12H2520
1.625
18V
779F
Nov-73
12H2708
Not NA
No
12H2116
12H2520
1.625
18V
780F
Nov-73
12H2708
Not NA
No
12H2116
12H2520
1.625
18V
797AE
Dec-74
BHM1062
NA
Yes
12H2116
12H4211
1.562
18V
798AE
Dec-74
BHM1062
NA
Yes
12H2116
12H4211
1.562
18V
801AE
Jul-75
BHM1062
USA
Yes
12H2116
12H4211
1.562
18V
802AE
Jul-75
BHM1062
USA
Yes
12H2116
12H4211
1.562
18V
836Z
Sep-74
48G644
NA
Yes
12H2116
12H2520
1.625
18V
837Z
Sep-74
48G644
NA
Yes
12H2116
12H2520
1.625
18V
846F
Sep-74
12H4735
Not NA
No
12H2116
12H4211
1.562
18V
847F
Sep-74
12H4735
Not NA
No
12H2116
12H4211
1.562
18V
883AE
Jun-76
BHM1062
Federal
Yes
12H2116
12H4211
1.562
18V
884AE
Jun-76
BHM1062
Federal
Yes
12H2116
12H4211
1.562
18V
890AE
Jun-76
BHM1062
CA
Yes
12H2116
12H4211
1.562
18V
891AE
Jun-76
BHM1062
CA
Yes
12H2116
12H4211
1.562
18V
892AE
Aug-76
BHM1062
Canada
Yes
12H2116
12H4211
1.562
18V
893AE
Aug-76
BHM1062
Canada
Yes
12H2116
12H4211
1.562
Data provided by Orin B. Harding
Run by: Robert Keller, rck@sgi.com
Fri Jun 9 15:11:01 PDT 1995
    *Market
    All All markets where sold
    Not NA Not for 50 states or Canada
    NA For 50 states and Canada
    USA 50 States only
    CA California only
    Federal 49 States only
    Canada Canada only
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