HEATER PIPES, HOSES AND THERMOSTAT HOUSING

CAR IDENTIFICATION MG B

When ordering parts it is essential that your car is identified exactly, by model year and serial number. Since many part
changes were made during model years, the car number, engine number and body number provide the only positive
identification. Quite often a car’s title will not show the correct model year. Before ordering parts, please use the space
provided below to copy the applicable numbers from your car. Use of these numbers is the best way to ensure that you
order and receive the correct parts. Wherever possible, we have listed part applications by car number (c). In some cases,
we had to use the engine numbers (e) or body numbers (b). Commission numbers, as used from 1968, are of little
significance and are not used for reference purposes. Where we use years, they are model years, not build dates. For
the sake of simplicity, we have deleted all alpha-numeric prefixes from change points found in our application columns.
While these letters are helpful in pinpointing certain production features, they do not affect the parts’ applications as listed.
Example: Car number GHN5/ UB/234567 is shown as (c) 234567. For more information on these numbers and years,
see the production data in the chart below.

Car Number

The Car Number for cars from 1963-69 is stamped on a plate secured to the right hand wing valance forward of the radiator.

The Car Number for cars from 1970 on is stamped on a plate secured to the left hand door post, and to a plate on top of the fascia.

Body Number

The Body Number for early chrome-bumpered cars is stamped on a plate on the left front valance behind the radiator
diaphragm as illustrated, or in some cases, in front of the radiator diaphragm.

Engine Number

The Engine Number is stamped on a plate secured to the right hand side of the cylinder block.

Commission Number

The Commission Number is stamped on a plate secured to the bonnet lock platform.

Gearbox Number

The Gearbox Number is stamped on top of the gearbox casing adjacent to the dipstick.

Power Unit Identification Serial Number Prefix Code (not V8)

Vehicle Identification Serial Number Prefix Letter Code (not V8)

Vehicle Identification Prefix Letter Code


* "1974-1/2" - The so-called "1974-1/2" model year began with roadster number 360301 and GT no. 361001 in September, 1974 and continued to the beginning of the 1975 model year.
** Calendar Year build dates are of historical significance only.
@ Commission Numbers were not used prior to 1968 model year.
# These numbers are approximate.
H 18GA engine used from car #31021 thru 48765.
Model Year	1st Month of Prod.		Car #First RD/GT	Car #First RD/GT Calendar Year**	Engine #First RD/GT	Commission #First RD/GT	Body # First RD/GT
1962	5/62	RD	-	GHN3/L/101	(3-main engine)	-	-
1963	1/63	RD	-	GHN3/L/4619	18G/UH/101 (3-main engine)	@	MGB/101
1964	8/63	RD	GHN3/L/19586	GHN3/L/27278	N/A H (3-main engine)	@	MGB/26813
1965	10/64	RD	GHN3/L/48766	GHN3/L/53635	18GB/UH/101 (first 5-main engine)	@	N/A
1965	10/64	GT	-	GHD3/L/71933	18GB/UH (con't.)	-	-
1966	10/65	RD	N/A	GHN3/L/75243	18GB/UH (con't.)	@	N/A
1966	10/65	GT	GHD3/L/71933	N/A	18GB/UH/30038	@	GBD/101
1967	11/66	RD	GHN3/L/108039	-	18GB/UH (con't.)	@	N/A
1967	11/66	GT	N/A	GHD3/L/109804	18GB/UH (con't.)	@	N/A
1968	10/67	RD	GHN4/U/138401	N/A	18GF/WE/H101	GU23N/101F	MGBU/101
1968	10/67	GT	GHD4/U/139472	N/A	18GF/WE/H101	GU23D/101P	GBUD/500101
1969	10/68	RD	GHN4/U/158371	GHN4/L/159806	18GH/WE/H101	G23N/18164#	MGB/14588#
1969	10/68	GT	GUD4/U/158233	GHD4/L/162552	18GH/WE/H101	N/A	N/A
1970	10/69	RD	GHN5/UA/187211	GHN5/UA/196222	18GH/-/22209	G23N/31862#	MGBU/27359
1970	10/69	GT	GHD5/UA/187841	GHD5/UA/194552	18GH/-/22209	G23D/18042	GBUD/510630
1971	9/70	RD	GHN5/UB/219021	GHN5/UB/232765	18GK/WE/H101	N/A	MGBU/300101
1971	9/70	GT	GHD5/UB/219355	GHD5/UB/233500	18GK/WE/H101	G23D/029048	GBUD/520235
1972	5/71	RD	GHN5/UC/258001	GHN5/UC/268635	18V/584Z/L101 (non O/D) 18V/585Z/L101 (O/D)	N/A	MGBU/400101
1972	5/71	GT	GHD5/UC/258004	GHD5/UC/269303	18V/585Z/L101 (O/D) 18V/672Z/L101 (non O/D)	G23D/047002	GBUD/620101
1973	8/72	RD	GHN5/UD/294251	GHN5/UD/307772	18V/63Z/L101 (O/D)	G23N/62557#	MGBU/500101
1973	8/72	GT	GHD5/UD/296001	GHD5/UD/31600	18V/672Z/L101 (non O/D) 18V/673/L101 (O/D)	N/A	GBUD/720101
1974*	8/73	RD	GHN5/UE/328101	GHN5/UE/338790	18V/672Z/L14891 (non O/D)# 18V/673Z/l14891 (O/D)#	G23N/86226#	MGBU/600101
1974*	8/73	GT	GHD5/UE/328801	GHD5/UE/338560	18V/672Z/L13234 (non O/D)#	G23D/70589	GBUD/820101
1974	9/74	1. Rubberbumper Model Roadster - from Chassis-No. 360301
1974	9/74	1. Chromebumper Model GT - from Chassis-No. 361001
1975	12/74	RD	GHN5/UF/368082 (N.Amer.) GHN5/UF/367901 (non-N.A.)	GHN5/UF/368090	18V/797AE/L101 (non O/D) 18V/798AE/L101 (O/D)	G23N/115009#	GU23T/7707
1975	12/74	GT	N/A	GHD5/UF/369101	N/A	N/A	N/A
1976	9/75	RD	GHN5/UG/386601	GHN5/UG/393763	18V/801AE/L101 (non O/D) 18V/802AE/L101 (O/D)	G23N/129440#	GU23T/50101
1976	9/75	GT	N/A	GHD5/UG/394665	N/A	N/A	N/A
1977	6/76	RD	GHN5/UH/410001	GHN5//UH/424748	18V/883AE/L101 (non O/D) 18V/884AE/L101 (O/D)	N/A	GU23T/760000
1977	6/76	GT	GHD5/UH/410351	GHD5/UH/422730	N/A	N/A	N/A
1978	9/77	RD	GHN5/UJ/447001	GHN5/UJ/455743	N/A	N/A	GU23T/860000
1978	9/77	GT	N/A	GHD5/UJ/455283	N/A	N/A	N/A
1979	6/78	RD	GHN5/UL/471001	GHN5/UL/485179	18V/883AEL/29033 (non O/D) #	N/A	GU23T/960000
1979	6/78	GT	N/A	GHD5/UL/483812	N/A	N/A	N/A
1980	6/79	RD	GVVDJ2AG/501001	GVVDJ2AIG/507309	18V/883AEL/43540 (non O/D) #	N/A	GU23T /984080#
1980	6/79	GT	N/A	GVGEJIAG/507309	N/A	N/A	N/A

HEATER PIPES, HOSES AND THERMOSTAT HOUSING

unillustrated articles

Ill.no.	Partno.	Part	Quantity required	Info	Price
NI	GHF301	WASHER 5/16 X 5/8 M8	1		CHF 0.55

Ill.no.	Partno.	Part	Quantity required	Info	Price
1	12H797	HOUSING THERMOSTAT	1	1962-67 18G-18GB	CHF 29.30

Ill.no.	Partno.	Part	Quantity required	Info	Price
2	12H2556Z	THERMOSTAT HOUSING	1	1967-76 18GG-18V673	CHF 36.75

Ill.no.	Partno.	Part	Quantity required	Info	Price
3	CAM1577	HOUSING-STAT MGB 76>	1	1976 on	CHF 87.50

Ill.no.	Partno.	Part	Quantity required	Info	Price
4	TRS1418	O-RING FILLER PLUG	1		CHF 2.05

Ill.no.	Partno.	Part	Quantity required	Info	Price
5	KTP9401	FILLER PLUG - BRASS	1		CHF 18.75
5	ARA2634B	PLUG BRASS	1		CHF 25.55

Ill.no.	Partno.	Part	Quantity required	Info	Price
6	CHS2515	STUD 5/16 UNC/F1-7/8	3		CHF 3.95

Ill.no.	Partno.	Part	Quantity required	Info	Price
7	GHF301	WASHER 5/16 X 5/8 M8	3		CHF 0.55

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

Ill.no.	Partno.	Part	Quantity required	Info	Price
9	GTG101	GASKET, THERMOSTAT HOUSING, CORK	1	standard material	CHF 0.75
9	GTG101X	GASKET THERMOSTAT HOUSING, KLINGERSIL	1	uprated material	CHF 5.60

Ill.no.	Partno.	Part	Quantity required	Info	Price
10	GTS102	THERMOSTAT 74° C/165°F	1	165°F - 74°C	CHF 11.65
10	GTS104	THERMOSTAT WAX TYPE 82°C/180°F STANDARD	1	180°F - 82°C	CHF 12.30
10	GTS106	THERMOSTAT WAX TYPE 90°C/195°F, COLD CLIMATE	1	190°F - 88°C	CHF 12.15
10	AJJ4012	BLANKING SLEEVE KIT THERMOSTAT	1	replaces thermostat, see 'Cooling'	CHF 22.65

Ill.no.	Partno.	Part	Quantity required	Info	Price
11	GTR101	THERMAL TRANSMITTER, WATER TEMP., ELECTRIC GAUGE	1	1976 on 18V883 on	CHF 18.65

Ill.no.	Partno.	Part	Quantity required	Info	Price
12	BHA5298	VALVE HEATER OE TOOLING MGB	1		CHF 48.35

Ill.no.	Partno.	Part	Quantity required	Info	Price
13	27H1193	CABLE CLAMP, OUTER	1		CHF 5.20

Ill.no.	Partno.	Part	Quantity required	Info	Price
14	AB606021	SCREW PANHD NO6X1/4	1		CHF 1.30

Ill.no.	Partno.	Part	Quantity required	Info	Price
15	24G1482K	TRUNNION KIT, INNER CABLE TO CONTROL ROD	4		CHF 3.75
15	24G1482	USE 24G1482K	4

Ill.no.	Partno.	Part	Quantity required	Info	Price
16	53K1016	SCREW TRUNNION	4		CHF 2.45

Ill.no.	Partno.	Part	Quantity required	Info	Price
17	12H3868	GASKET HEATER TAP/HEAD	1		CHF 1.10

Ill.no.	Partno.	Part	Quantity required	Info	Price
18	SH604071	SCREW 1/4" UNF X 7/8"	2		CHF 0.55

Ill.no.	Partno.	Part	Quantity required	Info	Price
19	GHF331	WASHER SPRING 1/4	2		CHF 0.55

Ill.no.	Partno.	Part	Quantity required	Info	Price
20	1G1282	BLANKING PLATE HEATER VALVE PORT	1		CHF 23.80

Ill.no.	Partno.	Part	Quantity required	Info	Price
21	GRH903	HOSE, VALVE TO HEATER	1		CHF 9.45
21	GRH903X	HOSE, VALVE TO HEATER, SILICONE	1		CHF 24.95

Ill.no.	Partno.	Part	Quantity required	Info	Price
22	CS4013	WIRECLIP 5/8 - 13/16	a/r	alternative	CHF 3.30
22	GHC11020	HOSE CLIP 13-20MM	a/r	alternative	CHF 6.00

Ill.no.	Partno.	Part	Quantity required	Info	Price
23	GRH1006M	HOSE, VALVE TO HEATER, 1/2IN, PER METRE	a/r	sold per metre	CHF 18.10

Ill.no.	Partno.	Part	Quantity required	Info	Price
24	AMK8847	ADAPTOR WATER TAKE OFF	1	18G-18GG 1962-71	CHF 31.75

Ill.no.	Partno.	Part	Quantity required	Info	Price
25	232043A	COPPER WASHER 13/16X5/8	1	18G-18GG 1962-71	CHF 2.90

Ill.no.	Partno.	Part	Quantity required	Info	Price
26	CS4012	WIRECLIP .625-.75IN	a/r	18G-18GG 1962-71	availability request (add quantity to basket, offer follows)
26	GHC11020	HOSE CLIP 13-20MM	a/r	18G-18GG 1962-71	CHF 6.00

Ill.no.	Partno.	Part	Quantity required	Info	Price
27	AHH5435	HEATER PIPE A&B >68	1	18G-18GB 1962-67	CHF 52.30

Ill.no.	Partno.	Part	Quantity required	Info	Price
28	PCR811	P CLIP, 1/2" CABLE DIAMETER X 11/32"	1	all models	CHF 9.20

Ill.no.	Partno.	Part	Quantity required	Info	Price
29	SH605041	SCREW 5/16" UNF X 1/2"	1	all models	CHF 1.30

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

Ill.no.	Partno.	Part	Quantity required	Info	Price
31	GHF301	WASHER 5/16 X 5/8 M8	1	all models	CHF 0.55

Ill.no.	Partno.	Part	Quantity required	Info	Price
32	GRH1006M	HOSE, VALVE TO HEATER, 1/2IN, PER METRE	a/r	sold per metre	CHF 18.10

Ill.no.	Partno.	Part	Quantity required	Info	Price
33	AHH9498	HEATER PIPE B 68>	1	18GG on 1976 on	CHF 33.40

Ill.no.	Partno.	Part	Quantity required	Info	Price
34	12H2557	NUT, ROCKER COVER, WITH STUD	2	18GG on 1976 on	CHF 13.25

Ill.no.	Partno.	Part	Quantity required	Info	Price
35	GHF301	WASHER 5/16 X 5/8 M8	2	18GG on 1976 on	CHF 0.55

Ill.no.	Partno.	Part	Quantity required	Info	Price
36	GHF331	WASHER SPRING 1/4	2	18GG on 1976 on	CHF 0.55
36	BHA5298Z	HEATER TAP MGB NONOE	1	18GG on 1976 on - aftermarket - alternative	CHF 31.75

Ill.no.	Partno.	Part	Quantity required	Info	Price
37	GHF201	NUT 5/16 UNF	2	18GG on 1976 on	CHF 0.40

Ill.no.	Partno.	Part	Quantity required	Info	Price
38	GRH903	HOSE, VALVE TO HEATER	1	18GG on 1976 on	CHF 9.45
38	GRH903X	HOSE, VALVE TO HEATER, SILICONE	1	18GG on 1976 on	CHF 24.95

Ill.no.	Partno.	Part	Quantity required	Info	Price
40	12H2463	LONG CYLINDER HEAD NUT	1	1976 on only	availability request (add quantity to basket, offer follows)
40	GHF261A	NUT 5/16 BRASS LONG	1	alternative	CHF 11.80

Ill.no.	Partno.	Part	Quantity required	Info	Price
1	12H797	HOUSING THERMOSTAT	1	1962-67 18G-18GB	CHF 29.30
2	12H2556Z	THERMOSTAT HOUSING	1	1967-76 18GG-18V673	CHF 36.75
3	CAM1577	HOUSING-STAT MGB 76>	1	1976 on	CHF 87.50
4	TRS1418	O-RING FILLER PLUG	1		CHF 2.05
5	KTP9401	FILLER PLUG - BRASS	1		CHF 18.75
5	ARA2634B	PLUG BRASS	1		CHF 25.55
6	CHS2515	STUD 5/16 UNC/F1-7/8	3		CHF 3.95
7	GHF301	WASHER 5/16 X 5/8 M8	3		CHF 0.55
8	GHF201	NUT 5/16 UNF	1		CHF 0.40
9	GTG101	GASKET, THERMOSTAT HOUSING, CORK	1	standard material	CHF 0.75
9	GTG101X	GASKET THERMOSTAT HOUSING, KLINGERSIL	1	uprated material	CHF 5.60
10	GTS102	THERMOSTAT 74° C/165°F	1	165°F - 74°C	CHF 11.65
10	GTS104	THERMOSTAT WAX TYPE 82°C/180°F STANDARD	1	180°F - 82°C	CHF 12.30
10	GTS106	THERMOSTAT WAX TYPE 90°C/195°F, COLD CLIMATE	1	190°F - 88°C	CHF 12.15
10	AJJ4012	BLANKING SLEEVE KIT THERMOSTAT	1	replaces thermostat, see 'Cooling'	CHF 22.65
11	GTR101	THERMAL TRANSMITTER, WATER TEMP., ELECTRIC GAUGE	1	1976 on 18V883 on	CHF 18.65
12	BHA5298	VALVE HEATER OE TOOLING MGB	1		CHF 48.35
13	27H1193	CABLE CLAMP, OUTER	1		CHF 5.20
14	AB606021	SCREW PANHD NO6X1/4	1		CHF 1.30
15	24G1482K	TRUNNION KIT, INNER CABLE TO CONTROL ROD	4		CHF 3.75
15	24G1482	USE 24G1482K	4
16	53K1016	SCREW TRUNNION	4		CHF 2.45
17	12H3868	GASKET HEATER TAP/HEAD	1		CHF 1.10
18	SH604071	SCREW 1/4" UNF X 7/8"	2		CHF 0.55
19	GHF331	WASHER SPRING 1/4	2		CHF 0.55
20	1G1282	BLANKING PLATE HEATER VALVE PORT	1		CHF 23.80
21	GRH903	HOSE, VALVE TO HEATER	1		CHF 9.45
21	GRH903X	HOSE, VALVE TO HEATER, SILICONE	1		CHF 24.95
22	CS4013	WIRECLIP 5/8 - 13/16	a/r	alternative	CHF 3.30
22	GHC11020	HOSE CLIP 13-20MM	a/r	alternative	CHF 6.00
23	GRH1006M	HOSE, VALVE TO HEATER, 1/2IN, PER METRE	a/r	sold per metre	CHF 18.10
24	AMK8847	ADAPTOR WATER TAKE OFF	1	18G-18GG 1962-71	CHF 31.75
25	232043A	COPPER WASHER 13/16X5/8	1	18G-18GG 1962-71	CHF 2.90
26	CS4012	WIRECLIP .625-.75IN	a/r	18G-18GG 1962-71	availability request (add quantity to basket, offer follows)
26	GHC11020	HOSE CLIP 13-20MM	a/r	18G-18GG 1962-71	CHF 6.00
27	AHH5435	HEATER PIPE A&B >68	1	18G-18GB 1962-67	CHF 52.30
28	PCR811	P CLIP, 1/2" CABLE DIAMETER X 11/32"	1	all models	CHF 9.20
29	SH605041	SCREW 5/16" UNF X 1/2"	1	all models	CHF 1.30
30	GHF332	WASHER SPRING 5/16	1	all models	CHF 0.30
31	GHF301	WASHER 5/16 X 5/8 M8	1	all models	CHF 0.55
32	GRH1006M	HOSE, VALVE TO HEATER, 1/2IN, PER METRE	a/r	sold per metre	CHF 18.10
33	AHH9498	HEATER PIPE B 68>	1	18GG on 1976 on	CHF 33.40
34	12H2557	NUT, ROCKER COVER, WITH STUD	2	18GG on 1976 on	CHF 13.25
35	GHF301	WASHER 5/16 X 5/8 M8	2	18GG on 1976 on	CHF 0.55
36	GHF331	WASHER SPRING 1/4	2	18GG on 1976 on	CHF 0.55
36	BHA5298Z	HEATER TAP MGB NONOE	1	18GG on 1976 on - aftermarket - alternative	CHF 31.75
37	GHF201	NUT 5/16 UNF	2	18GG on 1976 on	CHF 0.40
38	GRH903	HOSE, VALVE TO HEATER	1	18GG on 1976 on	CHF 9.45
38	GRH903X	HOSE, VALVE TO HEATER, SILICONE	1	18GG on 1976 on	CHF 24.95
40	12H2463	LONG CYLINDER HEAD NUT	1	1976 on only	availability request (add quantity to basket, offer follows)
40	GHF261A	NUT 5/16 BRASS LONG	1	alternative	CHF 11.80
NI	GHF301	WASHER 5/16 X 5/8 M8	1		CHF 0.55

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

HEATER PIPES, HOSES AND THERMOSTAT HOUSING