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.

Expansion tank cap at low cost: Top Spares

Sealing Cap, coolant tank ADP (FEBI BILSTEIN, 14700) -27%
original Sealing Cap, coolant tank FEBI BILSTEIN 14700 Article №: 14700
FEBI BILSTEIN Sealing Cap, coolant tank 14700
£ 6,49**
£ 4,74
incl. 20% VAT, excl. delivery costs
Over 100 items in stock
  • 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
  • Condition  New
Details
Sealing Cap, coolant tank 2,0bar (TOPRAN, 500 343) -27%
original Sealing Cap, coolant tank TOPRAN 500 343 Article №: 500 343
TOPRAN Sealing Cap, coolant tank 500 343
£ 5,99**
£ 4,37
incl. 20% VAT, excl. delivery costs
Over 100 items in stock
  • Opening Pressure [bar] 2,0
  • Colour Black
  • Material Plastic
  • Mounting Type Screw Connection
  • Condition  New
Details
Sealing Cap, coolant tank (ABAKUS, 053-027-004) -27%
original Sealing Cap, coolant tank ABAKUS 053-027-004 Article №: 053-027-004
ABAKUS Sealing Cap, coolant tank 053-027-004
£ 2,49**
£ 1,82
incl. 20% VAT, excl. delivery costs
Over 100 items in stock
  • Colour Blue
  • Pressure [bar] 1,4
  • Condition  New
Details
Sealing Cap, coolant tank Left (CALORSTAT by Vernet, RC0017) -27%
original Sealing Cap, coolant tank CALORSTAT by Vernet RC0017 Article №: RC0017
CALORSTAT by Vernet Sealing Cap, coolant tank RC0017
£ 4,49**
£ 3,28
incl. 20% VAT, excl. delivery costs
Over 100 items in stock
  • Pressure [bar] 1,4
  • Condition  New
Details
Sealing Cap, coolant tank (FEBI BILSTEIN, 37600) -27%
original Sealing Cap, coolant tank FEBI BILSTEIN 37600 Article №: 37600
FEBI BILSTEIN Sealing Cap, coolant tank 37600
£ 5,49**
£ 4,01
incl. 20% VAT, excl. delivery costs
Over 100 items in stock
  • Shifting Points [bar] 1,4
  • Mounting Type Screw Connection
  • Weight [kg] 0,04
  • Condition  New
Details
Sealing Cap, coolant tank for hot climate zones (FEBI BILSTEIN, 22080) -27%
original Sealing Cap, coolant tank FEBI BILSTEIN 22080 Article №: 22080
FEBI BILSTEIN Sealing Cap, coolant tank 22080
£ 5,49**
£ 4,01
incl. 20% VAT, excl. delivery costs
Over 100 items in stock
  • Shifting Points [bar] 1,4
  • Mounting Type Bayonet
  • Weight [kg] 0,07
  • Condition  New
Details
Sealing Cap, coolant tank 0,9bar (MAXGEAR, 28-0369) -27%
original Sealing Cap, coolant tank MAXGEAR 28-0369 Article №: 28-0369
MAXGEAR Sealing Cap, coolant tank 28-0369
£ 4,99**
£ 3,64
incl. 20% VAT, excl. delivery costs
Over 100 items in stock
  • Opening Pressure [bar] 0,9
  • Required quantity 1
  • Weight [kg] 0,050
  • Condition  New
Details
Sealing Cap, coolant tank 66mm, 2,0bar (MAHLE ORIGINAL, CRB 22 000P) -27%
original Sealing Cap, coolant tank MAHLE ORIGINAL CRB 22 000P Article №: CRB 22 000P
MAHLE ORIGINAL Sealing Cap, coolant tank CRB 22 000P
£ 15,49**
£ 11,31
incl. 20% VAT, excl. delivery costs
Over 100 items in stock
  • Diameter 1 [mm] 66
  • Diameter 2 [mm] 30
  • Opening Pressure [bar] 2,0
  • Version produced by MAHLE
  • Condition  New
Details
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