CAR Expansion tank cap

Coolant reservoir cap: common defects and their signs

  1. Corrosion and clogging of the cap valve.
    • Efficiency of cooling system operation decreases.
    • Level of cooling liquid in the expansion tank lowers.
    • Smoke appears from under the hood.
    • Coolant hoses are deformed.
    • Smell of antifreeze is noticeable in the car passenger compartment.
  2. Valve jamming.
    • Stains of antifreeze appear on coupling elements of the cooling system.
    • Boiling of cooling liquid occurs.
    • Antifreeze in the expansion tank quickly grows dark and cloudy.
    • The expansion tank may inflate or blow up.
  3. Spring wear.
    • Pressure in the cooling system increases.
    • The passenger compartment warms up insufficiently during cold season.
    • Antifreeze consumption increases.

How to replace coolant reservoir cap?

Manufacturers don’t indicate a specific lifetime limit for the coolant reservoir cap, so it is necessary to regularly check the component for mechanical damages. The part is not repairable, so it should be immediately replaced if any defect signs are found.

Procedure of car component replacement is quite simple, even a young driver can do it. One should be scrupulous about choosing a new component: the value of pressure at which the cap valve activates should strictly correspond to the same parameter of the broken-down part.

Basic sequence of steps for coolant reservoir cap replacement for any car is:

  1. Open the bonnet.
  2. Carefully unscrew the coolant reservoir cap.
  3. Clean the mounting seat of the cap.
  4. Install a new component and tighten it securely.

The work should only be performed after the engine cools down.

Expansion tank cap Information

Expansion tank cap: Bestsellers

-21%
ABAKUS Sealing Cap, coolant tank
Article № : 053-027-003
Read the product details
Buy ABAKUS 053-027-003
£ 2,08
£ 1,64
incl. 20% VAT, Shipping
  • Colour: Blue
  • Opening Pressure [bar]: 1,5
  • Condition: New

OEM-Number

1J 01 2 132 1B

1J 01 2 132 1

1J 01 2 132 1A

In stock
Read the product details
-21%
ABAKUS Sealing Cap, coolant tank
Article № : 053-027-002
Read the product details
Buy ABAKUS 053-027-002
£ 2,14
£ 1,69
incl. 20% VAT, Shipping
  • Colour: Blue
  • Opening Pressure [bar]: 1,5
  • Condition: New

OEM-Number

1H 01 2 132 1C

35 71 2 132 1C

1H 01 2 132 1A

In stock
Read the product details
-21%
TOPRAN Sealing Cap, coolant tank
Article № : 111 023
Read the product details
Buy TOPRAN 111 023
£ 3,89
£ 3,07
incl. 20% VAT, Shipping
  • Material: Plastic
  • Colour: Blue
  • Mounting Type: Screw Connection
  • Condition: New

OEM-Number

3B 01 2 132 1

95 81 0 644 700

In stock
Read the product details
-21%
FEBI BILSTEIN Sealing Cap, coolant tank
Article № : 01617
Read the product details
Buy FEBI BILSTEIN 01617
£ 13,85
£ 10,94
incl. 20% VAT, Shipping
  • Inner diameter [mm]: 28,5
  • Diameter [mm]: 56,0
  • Colour: Black
  • Condition: New

OEM-Number

17 11 7 639 022

17 11 1 742 231

17 11 1 712 669

In stock
Read the product details
-21%
BLUE PRINT Sealing Cap, coolant tank
Article № : ADC49902
Read the product details
Buy BLUE PRINT ADC49902
£ 5,86
£ 4,63
incl. 20% VAT, Shipping
  • Opening Pressure [bar]: 0,9
  • Weight [kg]: 0,050
  • Condition: New

OEM-Number

16 40 1 630 10

13 50 A 730

MB 66 0 735

In stock
Read the product details
-21%
ABAKUS Sealing Cap, coolant tank
Article № : 053-027-004
Read the product details
Buy ABAKUS 053-027-004
£ 1,96
£ 1,55
incl. 20% VAT, Shipping
  • Colour: Blue
  • Opening Pressure [bar]: 1,4
  • Condition: New
In stock
Read the product details
-21%
MAXGEAR Sealing Cap, coolant tank
Article № : 28-0369
Read the product details
Buy MAXGEAR 28-0369
£ 4,25
£ 3,36
incl. 20% VAT, Shipping
  • Opening Pressure [bar]: 0,9
  • Required quantity: 1
  • Weight [kg]: 0,050
  • Condition: New

OEM-Number

MR 48 1 252

0K 20 2 152 05A

21 43 0 01F 02

In stock
Read the product details
-21%
VAICO Sealing Cap, coolant tank
Article № : V10-0490
Read the product details
Buy VAICO V10-0490
£ 4,63
£ 3,66
incl. 20% VAT, Shipping
  • Colour: Blue
  • Pressure [bar]: 1,4
  • Material: Plastic
  • Condition: New
In stock
Read the product details