Thermostats and water pumps

Part No: FNZ105
  In Stock
NUT - 5/16" UNF
Required Quantity: 3
£0.35 inc VAT
£0.29 ex VAT
Part No: SH605101
  In Stock
SET SCREW- 5/16 UNF x 1 1/4''
Required Quantity: 2
£0.42 inc VAT
£0.35 ex VAT
Part No: PWZ105
  In Stock
WASHER - PLAIN - 5/16"
Required Quantity: 3
£0.20 inc VAT
£0.17 ex VAT
Part No: PWZ205
  In Stock
WASHER-PLAIN - 5/16" x 1"
Required Quantity: 3
£0.25 inc VAT
£0.21 ex VAT
Part No: LWZ305
  No Longer Available
USE: LWZ205
Required Quantity: 4
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Part No: SH605151
  In Stock
£0.36 inc VAT
£0.30 ex VAT
Part No: CAM4126
  In Stock
 
6 points earn (£0.06)
£7.74 inc VAT
£6.45 ex VAT
Part No: 3H2963
  In Stock
1 points earn (£0.01)
£1.50 inc VAT
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Part No: 11G292
  No Longer Available
USE: GTS1104
Required Quantity: 1
£0.00 inc VAT
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Part No: 11G291
  No Longer Available
USE: GTS1102
Required Quantity: 1
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Part No: GTS1104
  In Stock
THERMOSTAT-82 DEG.-SUMMER
Required Quantity: 1
4 points earn (£0.04)
£4.92 inc VAT
£4.10 ex VAT
Part No: GTS1102
  In Stock
THERMOSTAT-74 DEG.
Required Quantity: 1
2 points earn (£0.02)
£3.48 inc VAT
£2.90 ex VAT
Part No: GTS280
  In Stock
THERMOSTAT-88 DEGREE-(WINTER)
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Part No: 12A408
  No Longer Available
£0.00 inc VAT
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Part No: CAM4044
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Part No: ADP210
  In Stock
3 points earn (£0.03)
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£3.40 ex VAT
Part No: 1B3664
  In Stock
£0.25 inc VAT
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Part No: TAM1005
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Part No: TAM1007
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Part No: TAM1008
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Part No: CAM6117
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Part No: PEM10036
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Part No: PEG10002
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Part No: PEQ100690
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Part No: PEG100030
  Awaiting Stock - On Order
PLATE-SANDWICH-THERMOSTAT-MPI
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Part No: DAM7760
  In Stock
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Part No: 51K885
  In Stock
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Part No: 11G176
  In Stock
THERMOSTAT BLANKING SLEEVE
Required Quantity: 1
 
8 points earn (£0.08)
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Part No: GWP102
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USE: GWP134
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Part No: GWP132
  In Stock
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Part No: GWP134
  In Stock
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Part No: 8G2570
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Part No: 8G2675
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Part No: 88G446
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Part No: 8G733
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Part No: 88G618
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USE: 12A2075
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Part No: 53K1433
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Part No: 2K4974
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WASHER-FIBRE-1/4 DIAMETER
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Part No: GWP188
  In Stock
19 points earn (£0.19)
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Part No: TAM1180
  In Stock
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Part No: TAM1178
  In Stock
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Part No: 12A1344
  In Stock
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Part No: 12G2077
  No Longer Available
£0.00 inc VAT
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Part No: GUG705555GM
  In Stock
GASKET-WATER PUMP TO BLOCK
Required Quantity: 1
£0.96 inc VAT
£0.80 ex VAT
Part No: 12G103
  In Stock
6 points earn (£0.06)
£8.34 inc VAT
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Part No: GTG101
  In Stock
GASKET-THERMOSTAT HOUSING- CORK
Required Quantity: 1/2
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Part No: GWP101
  No Longer Available
USE: GWP132
Required Quantity: 1
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Part No: GWP187
  In Stock
13 points earn (£0.13)
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Part No: PEQ10010
  In Stock
41 points earn (£0.41)
£49.84 inc VAT
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Part No: PEQ10019
  Currently Unavailable
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Part No: PEQ100650
  Available to Customer Order
HOUSING-THERMOSTAT-MPI '97 ON
Required Quantity: 1
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Part No: CHS2515
  In Stock
STUD-5/16 UNF/UNC x 1 7/8''
Required Quantity: 3
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Part No: FHS2518
  In Stock
STUD-5/16 UNF/UNF x 2 1/4''
Required Quantity: 3
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Part No: GUG705558
  In Stock
GASKET-THERMOSTAT HOUSING, PAPER
Required Quantity: 1/2
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Thermostat and Housing    
Bellows type thermostats were originally fitted in the earliest of 848cc Minis and 997cc Coopers.  However, wax type thermostats soon took over; they were used in all subsequent Minis and also as replacements for the early bellows type.  From time to time, the bellows type thermostats are available, but it has to be said very infrequently. 
         
Owners of some cars whose engines were designed to operate with bellows thermostats swear by them (the early 4 cylinder Triumph TR sports cars are a case in point), but the BMC A Series engines in the earliest Minis seem to be at best unaffected by the type of thermostat and are probably better off with a wax type. 
         
Thermostats which opened at different temperatures were traditionally classified as being for temperate, hot or cold climates.  This was the case with the Mini up to 1975, with an 82 deg. C thermostat being recommended for temperate climates, 74 deg. C for hot climates and 88 deg. C for cold climates.  After 1975 the 88 deg. C thermostat was fitted as standard.  
         
The recommendation for temperate climates such as that of the United Kingdom is always more of a compromise than the recommendations for specifically hot or cold climates, often resulting in the car running a bit too warm in hot summers and feeble cabin heating in the winter.  This can be offset if desired by the use of an 82 deg. C thermostat in the summer and 88 deg. C in the winter.
         
All Models 1959-92      
Except 1275cc 1990-92      
Ill. No. Part No. Description Qty. Rqd. Remarks
1 11G292 THERMOSTAT, original bellows type, 82 deg. C 1 1959-61, temperate climates; may be replaced with wax type.
  11G291 THERMOSTAT, original bellows type, 74 deg. C 1 1959-61, hot climates; may be replaced with wax type.
2 GTS1104 THERMOSTAT, wax type, 82 deg. C 1 1959-75, temperate climates.
  GTS1102 THERMOSTAT, wax type, 74 deg. C 1 1959-75, hot climates.
  GTS280 THERMOSTAT, wax type, 88 deg. C 1 1959-75, cold climates.
  GTS280 THERMOSTAT, wax type, 88 deg. C 1 1975-92.
3 12G103 HOUSING, thermostat 1 1959-92, all models; except 1975-80, Canada and Sweden.
4 12A408 HOUSING, thermostat, with transmitter tapped boss 1 Some early to mid-1960s 848 and 998cc engines.
5 CAM4044 HOUSING, thermostat 1 1975-80, Canada and Sweden.
6 ADP210 PLUG, thermal transmitter boss 1 For 12A408 thermostat housing.
7 1B3664 WASHER, sealing plug 1 For 12A408 thermostat housing.
8 TAM1005 PLATE, sandwich, thermostat 1 1980-92, Japan.
9 TAM1007 PLUG, sandwich plate 1 1980-92, Japan.
10 TAM1008 WASHER, sealing plug 1 1980-92, Japan.
         
1275cc Models 1990-96      
Ill. No. Part No. Description Qty. Rqd. Remarks
11 GTS280 THERMOSTAT, wax type, 88 deg. C 1  
12 PEQ10019 HOUSING, thermostat, without drilled small outlet 1 1990-91, Cooper Rover Special Products and Cooper Carburetter models.
  CAM6117 HOUSING, thermostat, with drilled small outlet 1 Alternative to PEQ10019; small outlet must be blanked off with a cap before use.
PEQ10019 is a housing with an extra, smaller outlet - originally required for the Austin Metro model - which is not used and is therefore blanked off (i.e. not drilled). The original Metro item CAM6117 may be used in place of PEQ10019, but since the small outlet on it is drilled and operational, it must be capped before fitting to a carburetter Cooper.
Ill. No. Part No. Description Qty. Rqd. Remarks
13 12G103 HOUSING, thermostat   1 1991-96, single point injection models.
14 PEQ10010 HOUSING, thermostat, with sensor boss 1 1992-94, Mayfair and Sprite Carburetter models.
15 PEM10036 PLATE, sandwich, with fan switch boss 1 1990-91, Cooper Rover Special Products and Cooper Carburetter models.
16 PEG10002 PLATE, sandwich, without fan switch boss 1 1991-96, single point injection models. 1992-94, Mayfair and Sprite Carburetter models.
         
1275cc Models 1997 On      
Ill. No. Part No. Description Qty. Rqd. Remarks
17 GTS280 THERMOSTAT, wax type, 88 deg. C 1  
18 PEQ100650 HOUSING, thermostat 1 Multi point injection models.
19 PEQ100690 HOUSING, thermostat 1 Single point injection (Japan).
20 PEG100030 PLATE, sandwich 1 Multi point injection models.
21 PEG10002 PLATE, sandwich 1 Single point injection (Japan).
         
Thermostat Housing Fitting Hardware    
Ill. No. Part No. Description Qty. Rqd. Remarks
22 GTG101 GASKET,  housing and sandwich plate, cork 1/2 Qty. 2 required if sandwich plate is fitted.
  GUG705558 GASKET,  housing and sandwich plate, paper 1/2 Qty. 2 required if sandwich plate is fitted.
In theory the two gasket materials are interchangeable, but the cork gasket seems to be preferred by Somerford Mini customers for a simple thermostat housing fitment, whereas the later paper gasket is preferred for a thermostat housing with sandwich plate (applicable for Japan 1980 on).  
         
Ill. No. Part No. Description Qty. Rqd. Remarks
23A CHS2515 STUD, housing to cylinder head 3 1959-92, all models without sandwich plate except Canada and Sweden 1975-80.
  FHS2518 STUD, housing to cylinder head 3 Canada and Sweden 1975-80.
  51K885 STUD, housing and sandwich plate to cylinder head 3 Japan 998cc 1980-92 and 1275cc carb 1990-91.
23B FNZ105 NUT, housing and sandwich plate to cylinder head 3 1959-92, all models except 1991-92 injection.
24 PWZ105 WASHER, plain 3 1959-92, all models except 1991-92 injection.
25 DAM7760 BOLT, housing and sandwich plate to cylinder head 3 1992 on, plus 1991-92 injection models.
26 51K885 STUD, housing and sandwich plate to cylinder head 3 Alternative to DAM7760 bolt.
27 PWZ205 WASHER, plain 3 Alternative to DAM7760 bolt.
28 FNZ105 NUT  3 Alternative to DAM7760 bolt.
         
Thermostat Blanking Sleeve    
If the thermostat is removed from the engine to reduce the running temperature, a blanking sleeve must be fitted in its place to maintain the correct coolant flow around the engine; without the blanking sleeve fitted, overheating in certain areas will occur with resultant damage to the engine.  If the engine is fitted with a bypass hose, this will also require removal if a blanking sleeve is fitted.  This can be done by blanking the unions in the cylinder head and water pump with caps, also listed below.  Alternatively, if the water pump is due for replacement anyway, the later water pump without bypass hose facility GWP187 can be fitted.
Ill. No. Part No. Description Qty. Rqd. Remarks
29 11G176 BLANKING SLEEVE, thermostat 1  
30 CAM4126 PLUG, bypass hose union blanking 2 Use if thermostat blanking sleeve is fitted.
31 3H2963 CLIP, bypass hose union blanking plug 2  
         
Water Pump      
1959-84      
Before ordering a new water pump, you must establish which type is fitted to your engine.  There are two different types of impeller (or vane) in A Series engine water pump assemblies.  In early 1968 a deeper impeller was fitted to increase the capacity of the water pump; different machining work was required on the engine block to allow clearance for the deeper impeller.  You should not try to fit the later high capacity pump to an earlier engine. The early, shallow impeller stands out proud of the back of the water pump body by 5/16"; the 1968 onwards impeller stands out by 5/8". 
         
Earlier Mini engines were originally fitted with a cast iron bodied water pump, which was superseded in production by an alloy bodied version in the late 1970s. The cast iron bodied pump had three major differences from the later alloy design: 
(i) It has a screw-in adaptor for the bypass hose (on the alloy pump the bypass hose union is part of the main casting).  This is the easiest identification point.
(ii) It has a smaller inlet diameter, technically necessitating the use of a smaller diameter bottom hose (in practice the alloy pump type hose usually fits).
(iii) It may be repaired or serviced (whereas the alloy pump is a sealed unit).     
Cast iron water pumps are only occasionally available nowadays, as are the parts with which to service or repair them.  The majority of Mini engines now wear alloy pumps, as a cast iron pump may be directly replaced by an alloy pump of the correct capacity.
         
Ill. No. Part No. Description Qty. Rqd. Remarks
32 GWP101 WATER PUMP, cast iron, repairable 1 1959-68; may be replaced by GWP132.
  GWP102 WATER PUMP, cast iron, high capacity, repairable 1 1968-77 approx.; may be replaced by GWP134.
33 GWP132 WATER PUMP, alloy, sealed unit 1 1959-68.
  GWP134 WATER PUMP, alloy, high capacity, sealed unit 1 1968-84.
34 8G2570 REPAIR KIT, cast iron water pump 1 1959-68 (shallow impeller).
  8G2675 REPAIR KIT, high capacity cast iron water pump 1 1968-77 approx. (deep impeller).
35 88G446 SEAL, cast iron water pump 1 Included in repair kits.
36 8G733 HUB, pulley, cast iron water pump 1 Included in repair kits.
37 88G618 ADAPTOR, bypass hose 1 Cast iron pumps only.
38 53K1433 SCREW, lubricating point (if fitted) 1 Cast iron pumps only.
39 2K4974 WASHER, fibre, lubricating point (if fitted) 1 Cast iron pumps only.
         
1985-96       
Ill. No. Part No. Description Qty. Rqd. Remarks
40 GWP134 WATER PUMP, with bypass facility 1 998cc, 1985-92. 1275cc, Mayfair and Sprite Carburetter models, 1992-94.
41 GWP187 WATER PUMP, without bypass facility 1 1275cc, Cooper Rover Special Products and Cooper Carburetter, 1990-91. 1275cc, single point injection models, 1991-96.
         
1997 On      
Ill. No. Part No. Description Qty. Rqd. Remarks
42 GWP188 WATER PUMP, without bypass facility 1 1275cc, multi point injection, 1997 on.
        1275cc, single point injection (Japan), 1997 on.
         
Water Pump Fitting Hardware    
Ill. No. Part No. Description Qty. Rqd. Remarks
43 SH605151 SCREW, water pump to engine, long 2 1959-92; except 1275cc 1990-92.
44 SH605101 SCREW, water pump to engine, short 2 1959-92; except 1275cc 1990-92.
45 LWZ305 WASHER, locking 4 1959-92; except 1275cc 1990-92.
46 TAM1180 BOLT, water pump to engine, long 2 1990 on, 1275cc.
47 TAM1178 BOLT, water pump to engine, short 2 1990 on, 1275cc.
48 12A1344 DOWEL, water pump to engine 2 1959-68 (shallow impeller type pump).
  12G2077 DOWEL, water pump to engine 2 1968 on (deep impeller type pump).
49 GUG705555GM GASKET, water pump to engine 1  
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Part No: GUG705558
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Part No: FHS2518
  In Stock
1 points earn (£0.01)
£1.36 inc VAT
£1.13 ex VAT
Part No: CHS2515
  In Stock
£1.19 inc VAT
£0.99 ex VAT
Part No: PEQ100650
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£36.66 inc VAT
£30.55 ex VAT
Part No: PEQ10019
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£58.80 inc VAT
£49.00 ex VAT
Part No: PEQ10010
  In Stock
41 points earn (£0.41)
£49.84 inc VAT
£41.53 ex VAT
Part No: GWP187
  In Stock
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£16.20 inc VAT
£13.50 ex VAT
Part No: GWP101
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Part No: GTG101
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£1.28 ex VAT
Part No: 12G103
  In Stock
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£6.95 ex VAT
Part No: GUG705555GM
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£0.80 ex VAT
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