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Expansion tank cap for automobile

Spare: Coolant reservoir cap original

Information - Expansion tank cap

Cooling fluid reservoir cap: replacement and selection

When and why it is necessary to replace cooling fluid reservoir cap

Manufacturers do not specify exact operational lifetime for the cooling fluid reservoir cap. Replacement of the part is performed at appearance of cracks on it or at breakage. Moreover, a new cap is installed at valve jamming.

Mechanical damages of the component appear as a result of a road accident. The cause of valve jamming lies in its clogging. Particularly, this is possible, at appearance of emulsion in cooling fluid due to ingress of oil.

Presence of cap defect is indicated by leakage of working fluid from the reservoir, which is noticeable because of specific smell in the passenger compartment. Also leakages under the radiator or smoke from under the bonnet can appear.

During replacement of the cooling fluid reservoir cap you need to take into account, that it can be opened only at turned off and cooled engine. Cooling fluid circulates under the pressure and have high temperature, that is why there is a risk to sustain a burn wound if safety precautions are not observed. It is worth remembering that untimely replacement of the part can lead to improper functioning of the cooling system, which is fraught with engine breakdown.

How to select cooling fluid reservoir cap

The items differ from one another by construction. Thus, there are caps with two valves: safety (releases high pressure) and vacuum (normalizes low pressure). Also there are parts with one valve, which performs both functions noted above.

High-quality expansion tank caps are presented in the assortment of many brands. The most famous are Metzger, AKS DASIS, Swag, Gates, Topran, Vaico.

The items diverge from one another by shape, valve diameter, height and thread size. Moreover, maximum allowed pressure is noted for the components and it depends on the type of the radiator installed.

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Expansion tank cap at low cost: Top Spares

Sealing Cap, coolant tank with seal (RIDEX, 56V0006)
-24%
original Sealing Cap, coolant tank RIDEX 56V0006
Article №: 56V0006
RIDEX Sealing Cap, coolant tank 56V0006
£ 4,49**
£ 3,41
incl. 20% VAT, excl. delivery costs
  • Pressure [bar]: 1,4
  • Diameter [mm]: 50,0, 65,0
  • Colour: Black
  • Material: Plastic
  • Supplementary Article/Supplementary Info: with seal
  • Weight [kg]: 0,045
  • Condition: New
Details
Over 100 items in stock
Sealing Cap, coolant tank 2,0bar (TOPRAN, 500 343)
-24%
original Sealing Cap, coolant tank TOPRAN 500 343
Article №: 500 343
TOPRAN Sealing Cap, coolant tank 500 343
£ 5,99**
£ 4,55
incl. 20% VAT, excl. delivery costs
  • Opening Pressure [bar]: 2,0
  • Colour: Black
  • Material: Plastic
  • Mounting Type: Screw Connection
  • Condition: New
Details
Over 100 items in stock
Sealing Cap, coolant tank 1,4bar (TOPRAN, 720 173)
-24%
original Sealing Cap, coolant tank TOPRAN 720 173
Article №: 720 173
TOPRAN Sealing Cap, coolant tank 720 173
£ 4,49**
£ 3,41
incl. 20% VAT, excl. delivery costs
  • Opening Pressure [bar]: 1,4
  • Diameter [mm]: 60
  • Material: Plastic
  • Colour: Black
  • Mounting Type: Screw Connection
  • Thread Type: Inner Thread
  • Condition: New
Details
Over 100 items in stock
Sealing Cap, coolant tank (FEBI BILSTEIN, 37600)
-24%
original Sealing Cap, coolant tank FEBI BILSTEIN 37600
Article №: 37600
FEBI BILSTEIN Sealing Cap, coolant tank 37600
£ 5,49**
£ 4,17
incl. 20% VAT, excl. delivery costs
  • Shifting Points [bar]: 1,4
  • Mounting Type: Screw Connection
  • Weight [kg]: 0,04
  • for OE number: 1306.J5
  • Condition: New
Details
Over 100 items in stock
Sealing Cap, coolant tank (FEBI BILSTEIN, 22080)
-24%
original Sealing Cap, coolant tank FEBI BILSTEIN 22080
Article №: 22080
FEBI BILSTEIN Sealing Cap, coolant tank 22080
£ 5,49**
£ 4,17
incl. 20% VAT, excl. delivery costs
  • Shifting Points [bar]: 1,4
  • Mounting Type: Bayonet
  • Weight [kg]: 0,07
  • for OE number: 1306.C7
  • Condition: New
Details
Over 100 items in stock
Sealing Cap, coolant tank 1,5bar (FEBI BILSTEIN, 40722)
-24%
original Sealing Cap, coolant tank FEBI BILSTEIN 40722
Article №: 40722
FEBI BILSTEIN Sealing Cap, coolant tank 40722
£ 7,99**
£ 6,07
incl. 20% VAT, excl. delivery costs
  • Thickness [mm]: 32,0
  • Diameter [mm]: 87,0
  • Colour: Blue
  • Opening Pressure [bar]: 1,5
  • Weight [kg]: 0,064
  • for OE number: 3B0 121 321
  • Condition: New
Details
Over 100 items in stock
Sealing Cap, coolant tank ORIGINAL Quality (MEYLE, 314 800 9004)
-24%
original Sealing Cap, coolant tank MEYLE 314 800 9004
Article №: 314 800 9004
MEYLE Sealing Cap, coolant tank 314 800 9004
£ 12,49**
£ 9,49
incl. 20% VAT, excl. delivery costs
  • Pressure [bar]: 2
  • Colour: Black
  • Diameter [mm]: 56
  • Supplementary Info: ORIGINAL Quality
  • Condition: New
Details
Over 100 items in stock
Sealing Cap, coolant tank (FEBI BILSTEIN, 14700)
-24%
original Sealing Cap, coolant tank FEBI BILSTEIN 14700
Article №: 14700
FEBI BILSTEIN Sealing Cap, coolant tank 14700
£ 5,49**
£ 4,17
incl. 20% VAT, excl. delivery costs
  • Switch point from [bar]: 1,4
  • Switch point to [bar]: 1,6
  • Outer thread [mm]: M63 x 3
  • Colour: Blue
  • Material: Plastic
  • Weight [kg]: 0,16
  • for OE number: 1J0 121 321 B
  • Condition: New
Details
Over 100 items in stock
Sealing Cap, coolant tank 1,4bar (FEBI BILSTEIN, 12205)
-24%
original Sealing Cap, coolant tank FEBI BILSTEIN 12205
Article №: 12205
FEBI BILSTEIN Sealing Cap, coolant tank 12205
£ 7,49**
£ 5,69
incl. 20% VAT, excl. delivery costs
  • Opening Pressure [bar]: 1,4
  • Weight [kg]: 0,057
  • Condition: New
Details
Over 100 items in stock
Sealing Cap, coolant tank (ABAKUS, 017-027-001)
-24%
original Sealing Cap, coolant tank ABAKUS 017-027-001
Article №: 017-027-001
ABAKUS Sealing Cap, coolant tank 017-027-001
£ 4,49**
£ 3,41
incl. 20% VAT, excl. delivery costs
  • Colour: Black
  • Pressure [bar]: 1,5
  • Condition: New
Details
Over 100 items in stock
Sealing Cap, coolant tank with seal (TOPRAN, 111 023)
-24%
original Sealing Cap, coolant tank TOPRAN 111 023
Article №: 111 023
TOPRAN Sealing Cap, coolant tank 111 023
£ 4,49**
£ 3,41
incl. 20% VAT, excl. delivery costs
  • Material: Plastic
  • Colour: Blue
  • Mounting Type: Screw Connection
  • Thread Type: Outer Thread
  • Supplementary Article/Supplementary Info: with seal
  • for OE number: 3B0 121 321
  • Condition: New
Details
Over 100 items in stock
Sealing Cap, coolant tank 1,4bar (FEBI BILSTEIN, 02111)
-24%
original Sealing Cap, coolant tank FEBI BILSTEIN 02111
Article №: 02111
FEBI BILSTEIN Sealing Cap, coolant tank 02111
£ 4,49**
£ 3,41
incl. 20% VAT, excl. delivery costs
  • Colour: Blue
  • Material: Plastic
  • Opening Pressure [bar]: 1,4
  • Weight [kg]: 0,057
  • for OE number: 1H0 121 321 C
  • Condition: New
Details
Over 100 items in stock
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