RADIATOR, WATERPUMP AND FAN

CAR IDENTIFICATION MG A TWIN CAM

The Twin Cam MGA was a significant development for MG. It was in production from September 1958 until June 1960, during which period a total of 2111 cars were produced; they were numbered separately from regular MGA production. Being such an extensive development of the push rod 'B' series unit, the Twin Cam engine has little in common with the former. Another major difference from regular MGA's is of course the Dunlop braking system, endowing the Twin Cam with all-round disc brakes and necessitating a modified chassis plus a host of other detail changes.

MGA Roadster Identification Data

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 Twin Cam Chassis Numbers

YD1	RHD	Home Market Tourer
YD2	RHD	Export Market Tourer
YD3	LHD	Export Market Tourer
YM1	RHD	Home Market Coupé
YM2	RHD	Export Market Coupé
YM3	LHD	Export Market Coupé

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)

Car Number

The car number is stamped on a plate secured to the top lefthand side of the dash panel

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	ARH121E	RADIATOR MGA TWIN CAM SC 60.00	1		availability request (add quantity to basket, offer follows)
1	ARH121AL	RADIATOR ALLOY UPRATED	1		CHF 1'047.00

Ill.no.	Partno.	Part	Quantity required	Info	Price
2	061864	TAP, RADIATOR DRAIN BSP	1		CHF 32.30

Ill.no.	Partno.	Part	Quantity required	Info	Price
3	ARH517	WASHER FIBRE 1/2 ID	1		CHF 0.75

Ill.no.	Partno.	Part	Quantity required	Info	Price
4	AHH5144	RUBBER JOINTS RADIATOR MGA	a/r		CHF 5.75

Ill.no.	Partno.	Part	Quantity required	Info	Price
5	SH605071	SCREW 5/16" UNF X 7/8"	6		CHF 2.20

Ill.no.	Partno.	Part	Quantity required	Info	Price
6	GHF301	WASHER 5/16 X 5/8 M8	6		CHF 0.55

Ill.no.	Partno.	Part	Quantity required	Info	Price
7	GHF332	WASHER SPRING 5/16	6		CHF 0.30

Ill.no.	Partno.	Part	Quantity required	Info	Price
8	AHH5706	SEAL, RADIATOR	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
9	GRH357	HOSE RADIATOR BOTTOM	1		CHF 33.90

Ill.no.	Partno.	Part	Quantity required	Info	Price
10	CS4025	WIRECLIP1 3/8-1 9/16	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
11	CS4026	WIRECLIP1.7/16-1.5/8	1		CHF 3.30

Ill.no.	Partno.	Part	Quantity required	Info	Price
12	GRH356	HOSE RADIATOR TOP	1		CHF 43.65

Ill.no.	Partno.	Part	Quantity required	Info	Price
13	CS4029	WIRECLIP 1.625-1.8125 IN	1		CHF 3.85

Ill.no.	Partno.	Part	Quantity required	Info	Price
14	CS4025	WIRECLIP1 3/8-1 9/16	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
15	GRH392	HOSE RADIATOR BOTTOM GREEN	1		CHF 18.25
15	GRH392X	HOSE RADIATOR BOTTOM, STRAIGHT, GREEN, SILICONE	1		CHF 8.15

Ill.no.	Partno.	Part	Quantity required	Info	Price
16	CS4029	WIRECLIP 1.625-1.8125 IN	2		CHF 3.85

Ill.no.	Partno.	Part	Quantity required	Info	Price
21	AEH593	ALLOY HEADER TANK MGA TWINCAM	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
22	AEH487	NECK, TANK FILLER	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
23	AEH490	GASKET	1		CHF 2.05

Ill.no.	Partno.	Part	Quantity required	Info	Price
24	PMZ306	SCREW, 3/16" UNF X 3/8", PAN HEAD	6		CHF 0.75

Ill.no.	Partno.	Part	Quantity required	Info	Price
25	WL700101	WASHER SPRING 3/16	6		CHF 0.15

Ill.no.	Partno.	Part	Quantity required	Info	Price
26	GRC101	RADIATOR CAP 7PSI LONG	1	to chassis 652	CHF 8.10
26	GRC101SS	RADIATOR CAP 7PSI LONG SS	1	to chassis 652	CHF 14.95
NI	GRC126	RADIATOR CAP NON-PRESS FILL	1	from chassis 653	CHF 8.95

Ill.no.	Partno.	Part	Quantity required	Info	Price
28	AEH596	PIPE, OVERFLOW	1	to chassis 652	availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
29	AEH594	CONNECTOR, RUBBER	1	to chassis 652	availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
30	PCR611	P CLIP, 3/8" CABLE DIAMETER X 11/32"	1	to chassis 652	CHF 4.70

Ill.no.	Partno.	Part	Quantity required	Info	Price
31	AEH604	CLIP	1	to chassis 652	availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
36	PMZ308	SCREW, 3/16" UNF X 1/2", PAN HEAD	2	from chassis 653	CHF 0.95

Ill.no.	Partno.	Part	Quantity required	Info	Price
37	GHF206	NUT 10.32UNF(5/16AF)	2	from chassis 653	CHF 1.05

Ill.no.	Partno.	Part	Quantity required	Info	Price
38	WL700101	WASHER SPRING 3/16	2	from chassis 653	CHF 0.15

Ill.no.	Partno.	Part	Quantity required	Info	Price
39	AHH5906	BRACKET VALVE	1	from chassis 653	availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
40	SH604041	SCREW 1/4" UNF X 1/2"	2	from chassis 653	CHF 0.45

Ill.no.	Partno.	Part	Quantity required	Info	Price
41	GHF200	NUT 1/4 UNF	2	from chassis 653	CHF 0.75

Ill.no.	Partno.	Part	Quantity required	Info	Price
42	GHF331	WASHER SPRING 1/4	2	from chassis 653	CHF 0.55

Ill.no.	Partno.	Part	Quantity required	Info	Price
43	AHH5905	HOSE	1	from chassis 653	availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
44	AHH5907	TUBE, OVERFLOW	1	from chassis 653	availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
45	PCR607	P CLIP, 3/8" CABLE DIAMETER X 7/32"	1	from chassis 653	CHF 4.90

Ill.no.	Partno.	Part	Quantity required	Info	Price
46	PMZ306	SCREW, 3/16" UNF X 3/8", PAN HEAD	1	from chassis 653	CHF 0.75

Ill.no.	Partno.	Part	Quantity required	Info	Price
47	GHF206	NUT 10.32UNF(5/16AF)	1	from chassis 653	CHF 1.05

Ill.no.	Partno.	Part	Quantity required	Info	Price
48	GHF306	WASHER 3/16 X 3/8 OD	1	from chassis 653	CHF 0.95

Ill.no.	Partno.	Part	Quantity required	Info	Price
49	WL700101	WASHER SPRING 3/16	1	from chassis 653	CHF 0.15

Ill.no.	Partno.	Part	Quantity required	Info	Price
54	AEH575	HEADER TANK BRACKET	1		CHF 70.05

Ill.no.	Partno.	Part	Quantity required	Info	Price
55	GHF120	SCREW 5/16 UNF X 3/4	2		CHF 0.95

Ill.no.	Partno.	Part	Quantity required	Info	Price
56	GHF301	WASHER 5/16 X 5/8 M8	2		CHF 0.55

Ill.no.	Partno.	Part	Quantity required	Info	Price
57	GHF332	WASHER SPRING 5/16	2		CHF 0.30

Ill.no.	Partno.	Part	Quantity required	Info	Price
58	SH505061	SCREW 5/16" UNC X 3/4"	2		CHF 0.95

Ill.no.	Partno.	Part	Quantity required	Info	Price
59	GHF332	WASHER SPRING 5/16	2		CHF 0.30

Ill.no.	Partno.	Part	Quantity required	Info	Price
65	ADP605	PLUG	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
66	6K705	WASHER FIBRE NCA	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
67	AEH470	CONNECTION	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
68	UHN305	GREASE NIPPLE	1		CHF 6.25

Ill.no.	Partno.	Part	Quantity required	Info	Price
69	AEH463	GASKET	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
70	GHF103	SCREW 5/16 UNF X 1IN	2		CHF 1.10

Ill.no.	Partno.	Part	Quantity required	Info	Price
71	GHF332	WASHER SPRING 5/16	2		CHF 0.30

Ill.no.	Partno.	Part	Quantity required	Info	Price
72	AEH466	IMPELLER	1		CHF 115.25

Ill.no.	Partno.	Part	Quantity required	Info	Price
73	AEH465	SPINDLE	1		CHF 116.00

Ill.no.	Partno.	Part	Quantity required	Info	Price
74	TPS508	PIN TAPER NCA	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
75	AEB156	SEAL WATER PUMP SHAFT	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
76	AEB151	CIRCLIP	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
77	AEH523	COLLAR	1		CHF 8.40

Ill.no.	Partno.	Part	Quantity required	Info	Price
78	AEH528	SEALING RING, FRONT, FELT	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
79	AEH524	SEALING RING, REAR, FELT	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
82	AEF136	WATER PUMP BRG T/TYPE&TC	2		CHF 33.95

Ill.no.	Partno.	Part	Quantity required	Info	Price
83	AEH467	DISTANCE TUBE	1		CHF 7.45

Ill.no.	Partno.	Part	Quantity required	Info	Price
84	AEH529	CIRCLIP	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
89	WKN404	WOODRUFF KEY 1/2 D X 1/8	1		CHF 3.10

Ill.no.	Partno.	Part	Quantity required	Info	Price
90	AEH472	WATER PUMP PULLEY	1		CHF 290.15
90	AEH461/2	MGA TWIN CAM WATER PUMP COMPLETE	1		CHF 653.85

Ill.no.	Partno.	Part	Quantity required	Info	Price
91	AEH530	WASHER, LOCKING	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
92	GHF201	NUT 5/16 UNF	1		CHF 0.40

Ill.no.	Partno.	Part	Quantity required	Info	Price
93	AEH471	GASKET	1		availability request (add quantity to basket, offer follows)

Ill.no.	Partno.	Part	Quantity required	Info	Price
94	BH605221	BOLT 5/16UNFX2 3/4	1		CHF 2.10

Ill.no.	Partno.	Part	Quantity required	Info	Price
95	GHF332	WASHER SPRING 5/16	1		CHF 0.30

Ill.no.	Partno.	Part	Quantity required	Info	Price
96	GHF201	NUT 5/16 UNF	1		CHF 0.40

Ill.no.	Partno.	Part	Quantity required	Info	Price
97	AEG129	FAN BLADE MGA	1		CHF 117.00

Ill.no.	Partno.	Part	Quantity required	Info	Price
98	SH604051	SCREW 1/4" UNF X 5/8"	4		CHF 1.05

Ill.no.	Partno.	Part	Quantity required	Info	Price
99	GHF331	WASHER SPRING 1/4	4		CHF 0.55

Ill.no.	Partno.	Part	Quantity required	Info	Price
100	GCB10963	FAN BELT, LENGTH 963MM, WIDTH 10MM	1		CHF 16.50

Ill.no.	Partno.	Part	Quantity required	Info	Price
1	ARH121E	RADIATOR MGA TWIN CAM SC 60.00	1		availability request (add quantity to basket, offer follows)
1	ARH121AL	RADIATOR ALLOY UPRATED	1		CHF 1'047.00
2	061864	TAP, RADIATOR DRAIN BSP	1		CHF 32.30
3	ARH517	WASHER FIBRE 1/2 ID	1		CHF 0.75
4	AHH5144	RUBBER JOINTS RADIATOR MGA	a/r		CHF 5.75
5	SH605071	SCREW 5/16" UNF X 7/8"	6		CHF 2.20
6	GHF301	WASHER 5/16 X 5/8 M8	6		CHF 0.55
7	GHF332	WASHER SPRING 5/16	6		CHF 0.30
8	AHH5706	SEAL, RADIATOR	1		availability request (add quantity to basket, offer follows)
9	GRH357	HOSE RADIATOR BOTTOM	1		CHF 33.90
10	CS4025	WIRECLIP1 3/8-1 9/16	1		availability request (add quantity to basket, offer follows)
11	CS4026	WIRECLIP1.7/16-1.5/8	1		CHF 3.30
12	GRH356	HOSE RADIATOR TOP	1		CHF 43.65
13	CS4029	WIRECLIP 1.625-1.8125 IN	1		CHF 3.85
14	CS4025	WIRECLIP1 3/8-1 9/16	1		availability request (add quantity to basket, offer follows)
15	GRH392	HOSE RADIATOR BOTTOM GREEN	1		CHF 18.25
15	GRH392X	HOSE RADIATOR BOTTOM, STRAIGHT, GREEN, SILICONE	1		CHF 8.15
16	CS4029	WIRECLIP 1.625-1.8125 IN	2		CHF 3.85
21	AEH593	ALLOY HEADER TANK MGA TWINCAM	1		availability request (add quantity to basket, offer follows)
22	AEH487	NECK, TANK FILLER	1		availability request (add quantity to basket, offer follows)
23	AEH490	GASKET	1		CHF 2.05
24	PMZ306	SCREW, 3/16" UNF X 3/8", PAN HEAD	6		CHF 0.75
25	WL700101	WASHER SPRING 3/16	6		CHF 0.15
26	GRC101	RADIATOR CAP 7PSI LONG	1	to chassis 652	CHF 8.10
26	GRC101SS	RADIATOR CAP 7PSI LONG SS	1	to chassis 652	CHF 14.95
NI	GRC126	RADIATOR CAP NON-PRESS FILL	1	from chassis 653	CHF 8.95
28	AEH596	PIPE, OVERFLOW	1	to chassis 652	availability request (add quantity to basket, offer follows)
29	AEH594	CONNECTOR, RUBBER	1	to chassis 652	availability request (add quantity to basket, offer follows)
30	PCR611	P CLIP, 3/8" CABLE DIAMETER X 11/32"	1	to chassis 652	CHF 4.70
31	AEH604	CLIP	1	to chassis 652	availability request (add quantity to basket, offer follows)
36	PMZ308	SCREW, 3/16" UNF X 1/2", PAN HEAD	2	from chassis 653	CHF 0.95
37	GHF206	NUT 10.32UNF(5/16AF)	2	from chassis 653	CHF 1.05
38	WL700101	WASHER SPRING 3/16	2	from chassis 653	CHF 0.15
39	AHH5906	BRACKET VALVE	1	from chassis 653	availability request (add quantity to basket, offer follows)
40	SH604041	SCREW 1/4" UNF X 1/2"	2	from chassis 653	CHF 0.45
41	GHF200	NUT 1/4 UNF	2	from chassis 653	CHF 0.75
42	GHF331	WASHER SPRING 1/4	2	from chassis 653	CHF 0.55
43	AHH5905	HOSE	1	from chassis 653	availability request (add quantity to basket, offer follows)
44	AHH5907	TUBE, OVERFLOW	1	from chassis 653	availability request (add quantity to basket, offer follows)
45	PCR607	P CLIP, 3/8" CABLE DIAMETER X 7/32"	1	from chassis 653	CHF 4.90
46	PMZ306	SCREW, 3/16" UNF X 3/8", PAN HEAD	1	from chassis 653	CHF 0.75
47	GHF206	NUT 10.32UNF(5/16AF)	1	from chassis 653	CHF 1.05
48	GHF306	WASHER 3/16 X 3/8 OD	1	from chassis 653	CHF 0.95
49	WL700101	WASHER SPRING 3/16	1	from chassis 653	CHF 0.15
54	AEH575	HEADER TANK BRACKET	1		CHF 70.05
55	GHF120	SCREW 5/16 UNF X 3/4	2		CHF 0.95
56	GHF301	WASHER 5/16 X 5/8 M8	2		CHF 0.55
57	GHF332	WASHER SPRING 5/16	2		CHF 0.30
58	SH505061	SCREW 5/16" UNC X 3/4"	2		CHF 0.95
59	GHF332	WASHER SPRING 5/16	2		CHF 0.30
65	ADP605	PLUG	1		availability request (add quantity to basket, offer follows)
66	6K705	WASHER FIBRE NCA	1		availability request (add quantity to basket, offer follows)
67	AEH470	CONNECTION	1		availability request (add quantity to basket, offer follows)
68	UHN305	GREASE NIPPLE	1		CHF 6.25
69	AEH463	GASKET	1		availability request (add quantity to basket, offer follows)
70	GHF103	SCREW 5/16 UNF X 1IN	2		CHF 1.10
71	GHF332	WASHER SPRING 5/16	2		CHF 0.30
72	AEH466	IMPELLER	1		CHF 115.25
73	AEH465	SPINDLE	1		CHF 116.00
74	TPS508	PIN TAPER NCA	1		availability request (add quantity to basket, offer follows)
75	AEB156	SEAL WATER PUMP SHAFT	1		availability request (add quantity to basket, offer follows)
76	AEB151	CIRCLIP	1		availability request (add quantity to basket, offer follows)
77	AEH523	COLLAR	1		CHF 8.40
78	AEH528	SEALING RING, FRONT, FELT	1		availability request (add quantity to basket, offer follows)
79	AEH524	SEALING RING, REAR, FELT	1		availability request (add quantity to basket, offer follows)
82	AEF136	WATER PUMP BRG T/TYPE&TC	2		CHF 33.95
83	AEH467	DISTANCE TUBE	1		CHF 7.45
84	AEH529	CIRCLIP	1		availability request (add quantity to basket, offer follows)
89	WKN404	WOODRUFF KEY 1/2 D X 1/8	1		CHF 3.10
90	AEH472	WATER PUMP PULLEY	1		CHF 290.15
90	AEH461/2	MGA TWIN CAM WATER PUMP COMPLETE	1		CHF 653.85
91	AEH530	WASHER, LOCKING	1		availability request (add quantity to basket, offer follows)
92	GHF201	NUT 5/16 UNF	1		CHF 0.40
93	AEH471	GASKET	1		availability request (add quantity to basket, offer follows)
94	BH605221	BOLT 5/16UNFX2 3/4	1		CHF 2.10
95	GHF332	WASHER SPRING 5/16	1		CHF 0.30
96	GHF201	NUT 5/16 UNF	1		CHF 0.40
97	AEG129	FAN BLADE MGA	1		CHF 117.00
98	SH604051	SCREW 1/4" UNF X 5/8"	4		CHF 1.05
99	GHF331	WASHER SPRING 1/4	4		CHF 0.55
100	GCB10963	FAN BELT, LENGTH 963MM, WIDTH 10MM	1		CHF 16.50

We are closed from Wednesday noon (28.05.25). Orders will be delivered from Monday, June 2nd, 2025, thank you for your understanding.

RADIATOR, WATERPUMP AND FAN