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Engine thermostat for automobile

Spare: Coolant thermostat original

Information - Thermostat (radiator thermostat)

The thermostat is needed in order to regulate the amount of coolant that passes through the radiator. This ensures an optimal temperature mode for the whole system. This item is located in a hose between the radiator and the cooling jacket of the engine. Cars with powerful engines are provided with thermostat with electric heater, which enables a two-step temperature control of the coolant. In order to ensure that, there are three working positions in the construction of this item. When the engine is submitted to full load, the electric heater ensures a total opening of the thermostat. At the same time, the coolant temperature drops to 90 ° C, and decreases the possibility of engine knock. Usually, the coolant temperature holds within 105 ° C.

The thermostat itself is made of brass. To the bottom of the thermostat housing there is a weld bellows (sylphon) with an auxiliary valve and a hollow shaft with a main valve. Fabricated in the form of a cylindrical sylphon made of thin brass, the thermostat bellows is filled with a mixture of water and ethanol, which gets easily heated and boiled. When the water temperature is below 70 ° C, inside the bellows there is a low pressure of saturated liquid vapors, as it gets compressed under the pressure of the elastic corrugated walls.

Apart from that, the main valve is fully closed, and the auxiliary one - open. Moving in s short circuit, the water bypasses the radiator. Under the pressure of the evaporating liquid and at a water temperature above 70 ° C, the sleeve gets stretched, the spindle and the valves are put forward, which allows the water to enter the radiator through the opened main valve. When the water temperature exceeds 85 ° C, the auxiliary valve closes the side openings and cuts the access of water from the thermostat to the water pump.

If you have detected a problem with your thermostat, you need to check or replace the faulty part in a repair shop or garage. In order to avoid additional expenses for any part, for example radiator, brake hose or expansion valve, order it in our online store, and then replace it. This way you will save precious time and money.

What you need to know about thermostat replacement: lifetime limits, common defects and their signs, tips and recommendations

Averagely, replacement of the cooling radiator thermostat is performed every 4 years of exploitation or after 100 000 operational kilometers. If the component stops working correctly earlier, it also should be replaced. In most cases the cooling system thermostat breaks down because of valve jamming as a result of soiling, corrosion.

The fact that the antifreeze thermostat needs diagnostics is characterized by engine overheating or, vice versa, its inability to reach the working temperature and keep it. Engine overcooling is characterized by increased fuel consumption and lowering of heater operational efficiency in the passenger compartment. In case of overheating the appropriate indicator on the dashboard activates. You can also notice appearance of smoke from under the bonnet and scent of cooling liquid in the cabin. Similar signs can characterize defects of the oil radiator thermostat if it is included in car construction.

Diagnostics of the cooling liquid thermostat can be performed without its demounting. For this you need to start the cool engine and wait 2 minutes, then check the cooling liquid hose going from the thermostat to the radiator. This time is not sufficient for valve activation, thus the hose must be cold. In case if the pipe of the car thermostat gets warm at once or doesn’t get warm at all after a while, then the component needs replacement.

In order to replace the component you should drain antifreeze into the prepared tank after the engine cools down, remove hoses from pipes of the car thermostat. Then unscrew fixation nuts and remove the cap. Remove the defective component, install a new one, set the cap, apply greasing material to it, tighten fixations and fill cooling liquid. Replacement of the thermostat sealing ring is performed together with the thermostat itself. Sometimes replacement of the thermostat body in assembly is required. Moreover, the replacement procedure sometimes takes demounting of the radiator, fan viscous coupling or other components. That is why it is better to contact a service station for thermostat replacement.

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Engine thermostat at low cost: Top Spares

Thermostat, coolant 88°C, with seal, Synthetic Material Housing (RIDEX, 316T0004)
-24%
original Thermostat, coolant RIDEX 316T0004
Article №: 316T0004
RIDEX Thermostat, coolant 316T0004
£ 20,99**
£ 15,95
incl. 20% VAT, excl. delivery costs
  • Opening Temperature [°C]: 88
  • Supplementary Article/Supplementary Info: with seal
  • Housing Type: Synthetic Material Housing
  • Condition: New
Details
Over 100 items in stock
Thermostat, coolant 89°C, with seal (RIDEX, 316T0031)
-24%
original Thermostat, coolant RIDEX 316T0031
Article №: 316T0031
RIDEX Thermostat, coolant 316T0031
£ 7,49**
£ 5,69
incl. 20% VAT, excl. delivery costs
  • Opening Temperature [°C]: 89
  • Supplementary Article/Supplementary Info: with seal
  • Condition: New
Details
Over 100 items in stock
Thermostat, coolant 80°C, with gaskets/seals (RIDEX, 316T0008)
-24%
original Thermostat, coolant RIDEX 316T0008
Article №: 316T0008
RIDEX Thermostat, coolant 316T0008
£ 9,49**
£ 7,21
incl. 20% VAT, excl. delivery costs
  • Opening Temperature [°C]: 80
  • Supplementary Article/Supplementary Info: with gaskets/seals
  • Condition: New
Details
Over 100 items in stock
Thermostat, coolant 83°C, with seal (RIDEX, 316T0011)
-24%
original Thermostat, coolant RIDEX 316T0011
Article №: 316T0011
RIDEX Thermostat, coolant 316T0011
£ 6,49**
£ 4,93
incl. 20% VAT, excl. delivery costs
  • Opening Temperature [°C]: 83
  • Supplementary Article/Supplementary Info: with seal
  • Condition: New
Details
Over 100 items in stock
Thermostat, coolant 87°C, without housing (RIDEX, 316T0002)
-24%
original Thermostat, coolant RIDEX 316T0002
Article №: 316T0002
RIDEX Thermostat, coolant 316T0002
£ 5,49**
£ 4,17
incl. 20% VAT, excl. delivery costs
  • Opening Temperature [°C]: 87
  • Diameter 1 [mm]: 53,9
  • Diameter 2 [mm]: 35
  • Housing Type: without housing
  • Height 1 [mm]: 31,5
  • Condition: New
Details
Over 100 items in stock
Thermostat, coolant 105°C, with seal, Integrated housing, Synthetic Material Housing, with sensor (RIDEX, 316T0121)
-24%
original Thermostat, coolant RIDEX 316T0121
Article №: 316T0121
RIDEX Thermostat, coolant 316T0121
£ 57,99**
£ 44,07
incl. 20% VAT, excl. delivery costs
  • Opening Temperature [°C]: 105
  • Supplementary Article/Supplementary Info: with seal
  • Housing Type: Integrated housing, Synthetic Material Housing
  • Supplementary Article/Info 2: with sensor
  • Equipment Variant: Kennfeldttyp
  • Operating Mode: Electronic
  • Condition: New
Details
Over 100 items in stock
Thermostat, coolant ORIGINAL Quality, 87°C, with seal (MEYLE, 100 121 0048)
-24%
original Thermostat, coolant MEYLE 100 121 0048
Article №: 100 121 0048
MEYLE Thermostat, coolant 100 121 0048
£ 9,49**
£ 7,21
incl. 20% VAT, excl. delivery costs
  • Supplementary Info: ORIGINAL Quality
  • Opening Temperature [°C]: 87
  • Supplementary Article/Supplementary Info: with seal
  • Temperature range to [°C]: 102
  • Temperature range from [°C]: 87
  • Condition: New
Details
Over 100 items in stock
Thermostat, coolant 88°C, with housing (GATES, TH35488G1)
-24%
original Thermostat, coolant GATES TH35488G1
Article №: TH35488G1
GATES Thermostat, coolant TH35488G1
£ 40,99**
£ 31,15
incl. 20% VAT, excl. delivery costs
  • Opening Temperature [°C]: 88
  • Housing Type: with housing
  • Condition: New
Details
Over 100 items in stock
Thermostat, coolant 87°C, with seal (ERA, 350012A)
-24%
original Thermostat, coolant ERA 350012A
Article №: 350012A
ERA Thermostat, coolant 350012A
£ 10,49**
£ 7,97
incl. 20% VAT, excl. delivery costs
  • Opening Temperature [°C]: 87
  • Supplementary Article/Supplementary Info: with seal
  • Condition: New
Details
Over 100 items in stock
Thermostat, coolant 89°C, with seal (MAGNETI MARELLI, 352317101020)
-24%
original Thermostat, coolant MAGNETI MARELLI 352317101020
Article №: 352317101020
MAGNETI MARELLI Thermostat, coolant 352317101020
£ 7,49**
£ 5,69
incl. 20% VAT, excl. delivery costs
  • Opening Temperature [°C]: 89
  • Supplementary Article/Supplementary Info: with seal
  • Height [mm]: 23
  • Specification: Single Thermostat
  • Condition: New
Details
Over 100 items in stock
Thermostat, coolant 87°C, with seal, Metal Housing (ERA, 350000A)
-24%
original Thermostat, coolant ERA 350000A
Article №: 350000A
ERA Thermostat, coolant 350000A
£ 9,99**
£ 7,59
incl. 20% VAT, excl. delivery costs
  • Opening Temperature [°C]: 87
  • Supplementary Article/Supplementary Info: with seal
  • Housing Type: Metal Housing
  • Condition: New
Details
Over 100 items in stock
Thermostat, coolant 97°C, with seal, 0 (FEBI BILSTEIN, 43624)
-24%
original Thermostat, coolant FEBI BILSTEIN 43624
Article №: 43624
FEBI BILSTEIN Thermostat, coolant 43624
£ 53,99**
£ 41,03
incl. 20% VAT, excl. delivery costs
  • Opening Temperature [°C]: 97
  • Supplementary Article/Supplementary Info: with seal
  • Housing Type 0
  • Weight [kg]: 0,355
  • Observe service information
  • Material: Plastic
  • Number of connectors: 2
  • Condition: New
Details
Over 100 items in stock
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