CYLINDER HEAD

CAR IDENTIFICATION MG A

Year	Model	Numbers manufactured
September 1955 to May 1959	MGA 1500cc	10101 to 68,850
September 1958 to June 1960	MGA Twin Cam	501 to 2611
May 1959 to April 1961	MGA 1600cc	68,851 to 100,351
April 1961 to June 1962	MGA 1600cc MkII	100,352 to 109,070

BMC 'B' Series Engine Use(1953 to 1981)

Model	cc	Prefix	BHP/RPM	Torque
M.G. MGA	1489	BP15GB,15GB	68/5200	82
M.G. MGA	1489	15GD	72/5500	85
M.G. MGA 1600	1588	16GA	80/5600	87
MGA Twin Cam	1588	BC16GB	108/6700
M.G. MGA 1600 Mk2	1622	16GC	90/5500 97

MGA Serial Numbers

Engine Number

The engine number is stamped on a plate secured to the righthand side of the cylinder block...or it is stamped on a plate secured to the rear of the engine behind the cylinder block. (Twin Cam)

VIN Number

The car number is stamped on a plate secured to the top lefthand side of the scuttle in the engine bay.

Gearbox Number

The gearbox number is stamped on the top of the gearbox casing adjacent to the dipstick

Body Number

The body number is stamped on a plate secured to the bulkhead between the righthand bonnet hinge and the fuse block.

Rear Axle Number

The rear axle No is stamped on the front of the axle tube on the LH side next to the spring seat.

Identifying the MGA

There are only five variations of the MGA. The 1500cc, 1600cc, MkII, Twin Cam and 1600cc MkII De luxe. The Coupés were a variation of the Roadster and were not differentiated by the factory numbering system as to body style. The Twin Cam, a major undertaking at the time of its introduction, was identified separately while the De luxe, the most elusive of MGA models, was not distinctly identified. There are reliable production figures for all models except the De luxe.

The three major MGA models may be readily identified by their tail-lamp and grille configurations as well as their engine displacement.

A 1500cc will have the familiar single Lucas tail lamp, the flush style grille and no shroud or boot lid emblems. Four-wheel drum brakes were fitted to this model only.

Very early 1500ccs had different style gauge faces, an example of which can be found in the factory service manual and drivers handbook illustrations. The door rails on the first few cars were entirely of wood as were the cockpit rear corners. There are few of these seen today. The 1500's did not have the starter hump on the passenger toe board or the windscreen mounted hood clamp. The turn indicators were switched through a relay.

1600cc is differentiated by the dual rear lamp with separate turn lamps, larger round parking lamps with flat lenses and a '1600cc' marker on the cowl and rear boot lid. Disc brakes on the front greatly improved stopping power. The starter position was moved with the resulting hump on the passenger toe board.

The 1600cc MkII received the closest thing to a face lift an MGA ever got. The famous flat grille was replaced with the 'pre-crushed' version. The MkI Mini rear lamps appeared horizontally below the boot lid and the vinyl covered dash and cowl and 1600cc MkII badges were added. The chrome trim and dash escutcheon from the Coupé finished off the dash. Seat belt anchors were added to the chassis. 1600cc MkII De luxe cars used the Twin Cam chassis with the push rod 1622cc engine. Check all parts carefully, as MGA's have not always enjoyed the respect they do now, and parts have been freely exchanged with little regard for originality. When re-wiring your car, be sure to order the loom that fits your body type, not engine type.

Ill.no.	Partno.	Part	Quantity required	Info	Price
1	48G222LF	CYLINDER HEAD MGA LF COU	1	1500/1600cc	availability request (add quantity to basket, offer follows)
1	48G215LF	CYLINDER HEAD MGA L/F COU	1	MkII, 1622cc	availability request (add quantity to basket, offer follows)
NI	AJM104	GASKET SET CYLINDER HEAD	1		CHF 58.10

Ill.no.	Partno.	Part	Quantity required	Price
2	AJM104	GASKET SET CYLINDER HEAD	1	CHF 58.10
2	GUG155HG	GASKET CYLINDER HEAD	1	CHF 28.40
2	GUG155HGZ	GASKET CYLINDER HEAD 1500/1600, AFTERMARKET	1	CHF 35.35

Ill.no.	Partno.	Part	Quantity required	Info	Price
3	51K1193	NUT CYLINDER HEAD	11		CHF 1.35

Ill.no.	Partno.	Part	Quantity required	Info	Price
4	12H2178	WASHER FLAT 3/8" ID x 3/4" OD	11		CHF 1.40

Ill.no.	Partno.	Part	Quantity required	Info	Price
5	FHS2513	STUD 5/16 UNF X 1.625	2		CHF 3.35

Ill.no.	Partno.	Part	Quantity required	Info	Price
6	FSH2515	USE FHS2515	4

Ill.no.	Partno.	Part	Quantity required	Info	Price
7	1H1339	ROCKER COVER MGA	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
8	8G612	OIL FILLER CAP METAL	1		CHF 21.75

Ill.no.	Partno.	Part	Quantity required	Info	Price
9	AJM402	GASKET ROCKER COVER	1		CHF 5.40
9	296-311	GASKET ROCKER COVER, SILICONE, STANDARD COVER	1	standard cover	CHF 46.10
9	296-312	GASKET ROCKER COVER, SILICONE, ALUMINIUM COVER	1	alloy cover	CHF 59.20

Ill.no.	Partno.	Part	Quantity required	Info	Price
10	2A150	TUBE NUT, RETAINING ROCKER COVER	2		CHF 7.95
10	CAM6823	TUBE NUT RETAINING ROCKER COVER, CHROME	2		CHF 11.45

Ill.no.	Partno.	Part	Quantity required	Info	Price
11	12A1358	BUSH, SEALING, RUBBER	2		CHF 1.35

Ill.no.	Partno.	Part	Quantity required	Info	Price
12	1A2156	CUP WASHER ROCKER COVER	2		CHF 2.15
12	12G679	WASHER CUP CHROME	2		CHF 4.30

Ill.no.	Partno.	Part	Quantity required	Info	Price
13	1B2925	SPACER, ROCKER COVER	2		CHF 3.45
13	CAM6921	SPACER CHROME	2		CHF 3.60

Ill.no.	Partno.	Part	Quantity required	Info	Price
15	GEG602	MANIFOLD GASKET PREMIUM	1		CHF 16.95
15	GEG602Z	USE GEG602	1	aftermarket

Ill.no.	Partno.	Part	Quantity required	Info	Price
17	6K872	BRASS PLUG, CYLINDER HEAD OIL FEED	1		CHF 3.85

Ill.no.	Partno.	Part	Quantity required	Info	Price
18	12H797	HOUSING THERMOSTAT	1		CHF 19.65

Ill.no.	Partno.	Part	Quantity required	Info	Price
19	GTG101	GASKET, THERMOSTAT HOUSING, CORK	1	standard material	CHF 0.65
19	GTG101X	GASKET THERMOSTAT HOUSING, KLINGERSIL	1	uprated material	CHF 7.95

Ill.no.	Partno.	Part	Quantity required	Info	Price
20	GTS102	THERMOSTAT 74° C/165°F	1	hot climates	CHF 9.45
20	GTS104	USE GTS101	1	standard conditions
20	GTS106	THERMOSTAT WAX TYPE 90°C/195°F, COLD CLIMATE	1	cold climates	CHF 9.45

Ill.no.	Partno.	Part	Quantity required	Info	Price
21	CHS2515	STUD 5/16 UNC/F1-7/8	3		CHF 3.35

Ill.no.	Partno.	Part	Quantity required	Info	Price
22	12H3868	GASKET HEATER TAP/HEAD	1		CHF 1.35

Ill.no.	Partno.	Part	Quantity required	Info	Price
23	1G1282	BLANKING PLATE HEATER VALVE PORT	1	when heater not fitted	CHF 23.75

Ill.no.	Partno.	Part	Quantity required	Info	Price
25	12H3376	SCREW ADJUSTER	8		CHF 2.30

Ill.no.	Partno.	Part	Quantity required	Info	Price
26	51K1178	LOCKNUT ROCKER ADJUSTING	8		CHF 0.65

Ill.no.	Partno.	Part	Quantity required	Info	Price
27	12H3377	ROCKER ARM	8		CHF 26.40

Ill.no.	Partno.	Part	Quantity required	Info	Price
28	SC2436	USE 5C2436	8

Ill.no.	Partno.	Part	Quantity required	Info	Price
29	1G2295	BUSH, ROCKER SHAFT	8	must be drilled & reamed	CHF 3.35

Ill.no.	Partno.	Part	Quantity required	Info	Price
30	11G62Z	ROCKER SHAFT AFTERMARKET	1		CHF 30.35
30	11G62K	R/SHAFT ASSY B>74EXC	1	includes items 25 - 43	availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
31	2K4608	PLUG, THREADED	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
32	6K878	PLUG	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
37	044630	DOUBLE SPRING WASHER R/SHAFT END TR2-4A 0.625ID	2		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
38	PWZ110	WASHER, PLAIN, 5/8" ID X 1.1/4" OD	2		CHF 1.40

Ill.no.	Partno.	Part	Quantity required	Info	Price
39	6K871	SPRING SPACER ROCKER SHAFT	3		CHF 7.20

Ill.no.	Partno.	Part	Quantity required	Info	Price
40	12H389	PEDESTAL ROCKERSHAFT B RECONDITIONED	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
41	12H390	PILLAR ROCKERSHAFT (1>3) MGB PLAIN	3		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
42	2A258	SCREW, SHAFT LOCATING	1		CHF 2.90

Ill.no.	Partno.	Part	Quantity required	Info	Price
43	2A259	PLATE, PEDESTAL LOCATING	1		CHF 12.10

Ill.no.	Partno.	Part	Quantity required	Info	Price
44	GHF201	NUT 5/16 UNF	4		CHF 0.75

Ill.no.	Partno.	Part	Quantity required	Info	Price
50	1K800	COTTER, VALVE RETAINER, PAIR	16		CHF 7.35

Ill.no.	Partno.	Part	Quantity required	Info	Price
51	1K372	SPRING CLIP	8		CHF 2.90

Ill.no.	Partno.	Part	Quantity required	Info	Price
52	AEK113	SEAL VALVE STEM	8		CHF 0.55
52	12B2104	SEAL, VALVE STEM, IMPROVED	8		CHF 1.35

Ill.no.	Partno.	Part	Quantity required	Info	Price
53	1H1319	USE 12H992	8	original type
53	12H992	CAP VALVE SPRING TOP	8	replacement	CHF 6.95

Ill.no.	Partno.	Part	Quantity required	Info	Price
54	1H725	OIL DEFLECTOR, VALVE	8		CHF 23.10

Ill.no.	Partno.	Part	Quantity required	Info	Price
55	12H176K	VALVE SPRING SET	1	standard	CHF 50.20
55	TMG10707	VALVE SPRING SET, 8 PIECES, UPRATED	1	fast road/sport	CHF 84.65

Ill.no.	Partno.	Part	Quantity required	Info	Price
56	1H1321	COLLAR, VALVE TWIN SPRING, LOWER	8		CHF 4.60

Ill.no.	Partno.	Part	Quantity required	Info	Price
60	1H1059	VALVE, INLET, 1.5" DIAMETER	4	1500cc, 1600cc	CHF 10.10
60	12H435	VALVE, INLET, 1.563"	4	MkII (1622cc)	CHF 10.10

Ill.no.	Partno.	Part	Quantity required	Info	Price
61	1H1323	VALVE EXHAUST	4	1.281" diameter	CHF 13.45
61	MM423-115	VALVE, EXHAUST, STELLITE FACED, 1.281"	4	uprated	CHF 52.90
61	12H436	VALVE EXHAUST 1.343"-1.348"	4	1.344" diameter	CHF 15.45
61	MM423-155	VALVE, EXHAUST, STELLITE FACED, 1.344"	4	uprated	CHF 52.90

Ill.no.	Partno.	Part	Quantity required	Info	Price
62	12H2222	VALVE GUIDE, INLET, STANDARD	4		CHF 3.35

Ill.no.	Partno.	Part	Quantity required	Info	Price
63	TMG10795	VALVE GUIDE, INLET, UPRATED, BRONCE	4	silicone bronze	CHF 27.35

Ill.no.	Partno.	Part	Quantity required	Info	Price
64	12B1339	VALVE GUIDE, EXHAUST, STANDARD	4		CHF 3.60

Ill.no.	Partno.	Part	Quantity required	Info	Price
65	TMG10796	VALVE GUIDE, EXHAUST, UPRATED, BRONCE	4	silicone bronze	CHF 24.40

Ill.no.	Partno.	Part	Quantity required	Info	Price
67	51K881	STUD ROCKER COVER SHORT	2		CHF 6.75

Ill.no.	Partno.	Part	Quantity required	Info	Price
68	51K893	STUD ROCKER COVER LONG	2		CHF 5.05

Ill.no.	Partno.	Part	Quantity required	Info	Price
70	CRCP349	ROCKER COVER PLATE MG >67, METAL	1	MG crest	CHF 11.55

Ill.no.	Partno.	Part	Quantity required	Info	Price
71	CRCP350	ENGINE PLATE WESLAKE >67, METAL	1	patent number	CHF 12.95

Ill.no.	Partno.	Part	Quantity required	Info	Price
72	AHA9999	RIVET OUTER LOWER	4		CHF 1.40

Ill.no.	Partno.	Part	Quantity required	Info	Price
1	48G222LF	CYLINDER HEAD MGA LF COU	1	1500/1600cc	availability request (add quantity to basket, offer follows)
1	48G215LF	CYLINDER HEAD MGA L/F COU	1	MkII, 1622cc	availability request (add quantity to basket, offer follows)
NI	AJM104	GASKET SET CYLINDER HEAD	1		CHF 58.10
2	AJM104	GASKET SET CYLINDER HEAD	1		CHF 58.10
2	GUG155HG	GASKET CYLINDER HEAD	1		CHF 28.40
2	GUG155HGZ	GASKET CYLINDER HEAD 1500/1600, AFTERMARKET	1		CHF 35.35
3	51K1193	NUT CYLINDER HEAD	11		CHF 1.35
4	12H2178	WASHER FLAT 3/8" ID x 3/4" OD	11		CHF 1.40
5	FHS2513	STUD 5/16 UNF X 1.625	2		CHF 3.35
6	FSH2515	USE FHS2515	4
7	1H1339	ROCKER COVER MGA	1		availability request (add quantity to basket, offer follows)
8	8G612	OIL FILLER CAP METAL	1		CHF 21.75
9	AJM402	GASKET ROCKER COVER	1		CHF 5.40
9	296-311	GASKET ROCKER COVER, SILICONE, STANDARD COVER	1	standard cover	CHF 46.10
9	296-312	GASKET ROCKER COVER, SILICONE, ALUMINIUM COVER	1	alloy cover	CHF 59.20
10	2A150	TUBE NUT, RETAINING ROCKER COVER	2		CHF 7.95
10	CAM6823	TUBE NUT RETAINING ROCKER COVER, CHROME	2		CHF 11.45
11	12A1358	BUSH, SEALING, RUBBER	2		CHF 1.35
12	1A2156	CUP WASHER ROCKER COVER	2		CHF 2.15
12	12G679	WASHER CUP CHROME	2		CHF 4.30
13	1B2925	SPACER, ROCKER COVER	2		CHF 3.45
13	CAM6921	SPACER CHROME	2		CHF 3.60
15	GEG602	MANIFOLD GASKET PREMIUM	1		CHF 16.95
15	GEG602Z	USE GEG602	1	aftermarket
17	6K872	BRASS PLUG, CYLINDER HEAD OIL FEED	1		CHF 3.85
18	12H797	HOUSING THERMOSTAT	1		CHF 19.65
19	GTG101	GASKET, THERMOSTAT HOUSING, CORK	1	standard material	CHF 0.65
19	GTG101X	GASKET THERMOSTAT HOUSING, KLINGERSIL	1	uprated material	CHF 7.95
20	GTS102	THERMOSTAT 74° C/165°F	1	hot climates	CHF 9.45
20	GTS104	USE GTS101	1	standard conditions
20	GTS106	THERMOSTAT WAX TYPE 90°C/195°F, COLD CLIMATE	1	cold climates	CHF 9.45
21	CHS2515	STUD 5/16 UNC/F1-7/8	3		CHF 3.35
22	12H3868	GASKET HEATER TAP/HEAD	1		CHF 1.35
23	1G1282	BLANKING PLATE HEATER VALVE PORT	1	when heater not fitted	CHF 23.75
25	12H3376	SCREW ADJUSTER	8		CHF 2.30
26	51K1178	LOCKNUT ROCKER ADJUSTING	8		CHF 0.65
27	12H3377	ROCKER ARM	8		CHF 26.40
28	SC2436	USE 5C2436	8
29	1G2295	BUSH, ROCKER SHAFT	8	must be drilled & reamed	CHF 3.35
30	11G62Z	ROCKER SHAFT AFTERMARKET	1		CHF 30.35
30	11G62K	R/SHAFT ASSY B>74EXC	1	includes items 25 - 43	availability request (add quantity to basket, offer follows)
31	2K4608	PLUG, THREADED	1		availability request (add quantity to basket, offer follows)
32	6K878	PLUG	1		availability request (add quantity to basket, offer follows)
37	044630	DOUBLE SPRING WASHER R/SHAFT END TR2-4A 0.625ID	2		availability request (add quantity to basket, offer follows)
38	PWZ110	WASHER, PLAIN, 5/8" ID X 1.1/4" OD	2		CHF 1.40
39	6K871	SPRING SPACER ROCKER SHAFT	3		CHF 7.20
40	12H389	PEDESTAL ROCKERSHAFT B RECONDITIONED	1		availability request (add quantity to basket, offer follows)
41	12H390	PILLAR ROCKERSHAFT (1>3) MGB PLAIN	3		availability request (add quantity to basket, offer follows)
42	2A258	SCREW, SHAFT LOCATING	1		CHF 2.90
43	2A259	PLATE, PEDESTAL LOCATING	1		CHF 12.10
44	GHF201	NUT 5/16 UNF	4		CHF 0.75
50	1K800	COTTER, VALVE RETAINER, PAIR	16		CHF 7.35
51	1K372	SPRING CLIP	8		CHF 2.90
52	AEK113	SEAL VALVE STEM	8		CHF 0.55
52	12B2104	SEAL, VALVE STEM, IMPROVED	8		CHF 1.35
53	1H1319	USE 12H992	8	original type
53	12H992	CAP VALVE SPRING TOP	8	replacement	CHF 6.95
54	1H725	OIL DEFLECTOR, VALVE	8		CHF 23.10
55	12H176K	VALVE SPRING SET	1	standard	CHF 50.20
55	TMG10707	VALVE SPRING SET, 8 PIECES, UPRATED	1	fast road/sport	CHF 84.65
56	1H1321	COLLAR, VALVE TWIN SPRING, LOWER	8		CHF 4.60
60	1H1059	VALVE, INLET, 1.5" DIAMETER	4	1500cc, 1600cc	CHF 10.10
60	12H435	VALVE, INLET, 1.563"	4	MkII (1622cc)	CHF 10.10
61	1H1323	VALVE EXHAUST	4	1.281" diameter	CHF 13.45
61	MM423-115	VALVE, EXHAUST, STELLITE FACED, 1.281"	4	uprated	CHF 52.90
61	12H436	VALVE EXHAUST 1.343"-1.348"	4	1.344" diameter	CHF 15.45
61	MM423-155	VALVE, EXHAUST, STELLITE FACED, 1.344"	4	uprated	CHF 52.90
62	12H2222	VALVE GUIDE, INLET, STANDARD	4		CHF 3.35
63	TMG10795	VALVE GUIDE, INLET, UPRATED, BRONCE	4	silicone bronze	CHF 27.35
64	12B1339	VALVE GUIDE, EXHAUST, STANDARD	4		CHF 3.60
65	TMG10796	VALVE GUIDE, EXHAUST, UPRATED, BRONCE	4	silicone bronze	CHF 24.40
67	51K881	STUD ROCKER COVER SHORT	2		CHF 6.75
68	51K893	STUD ROCKER COVER LONG	2		CHF 5.05
70	CRCP349	ROCKER COVER PLATE MG >67, METAL	1	MG crest	CHF 11.55
71	CRCP350	ENGINE PLATE WESLAKE >67, METAL	1	patent number	CHF 12.95
72	AHA9999	RIVET OUTER LOWER	4		CHF 1.40