CAR Coolant expansion tank / coolant reservoir

Coolant expansion tank: common defects and their signs

  1. Corrosion and clogging of the expansion tank cap valve.
    • Temperature of the engine increases.
    • The passenger compartment warms up insufficiently during winter time.
    • Smoke appears from under the hood.
  2. Valve jamming.
    • Pressure in the cooling system increases.
    • Pipes and clamps crack.
    • The tank may inflate or explode.
  3. Tank body cracking.
    • Antifreeze consumption increases.
    • The engine overheats.
    • Efficiency of the cooling system worsens.
    • Cooling liquid leaks.

How to repair or replace coolant expansion tank?

Manufacturers recommend to replace the car coolant expansion tank once a year. However, if the component breaks down earlier, it is necessary to repair or replace it immediately.

The cooling system expansion tank can be repaired, if the cause of its malfunction is in the cap valve. In this case, you can just replace the cap. Make sure the spare part is marked identically to the broken one.

If the housing is cracked or damaged, the coolant expansion tank requires replacement. It can be performed single-handedly, as the procedure is quite simple. In order to replace the part, you need to:

  1. After the engine cools down, drain cooling liquid into a spare container.
  2. Loosen the clamps of steam- and liquid-discharge hoses and remove them from the tank.
  3. Remove tank fasteners from the bracket.
  4. Lift and tilt the tank in the direction of the headlights to release it.
  5. Loosen the lower clamp and remove the hose from the tank pipe. Remove the tank.
  6. Install a new one in reverse order. Fill with antifreeze up to the mark on tank walls.
  7. Start the engine and check for leaks on tank walls and hoses.

Coolant expansion tank / coolant reservoir Information

Coolant expansion tank / coolant reservoir: Bestsellers

-21%
FEBI BILSTEIN Expansion Tank, coolant
Article № : 46748
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£ 14,35
£ 11,34
incl. 20% VAT, Shipping
  • Supplementary Article/Info 2: with sensor
  • Number of connectors: 2
  • Weight [kg]: 0,319
  • Condition: New

OEM-Number

1K 01 2 140 7A

1K 01 2 140 7

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-21%
VAICO Expansion Tank, coolant
Article № : V46-0291
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£ 11,68
£ 9,23
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  • Supplementary Info: Original VAICO Quality
  • Supplementary Article/Info 2: without lid
  • for OE number: 77 01 470 460
  • Condition: New

OEM-Number

77 01 4 704 60

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-21%
TOPRAN Expansion Tank, coolant
Article № : 722 676
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£ 12,36
£ 9,76
incl. 20% VAT, Shipping
  • Supplementary Article/Info 2: without lid
  • Material: Plastic
  • Observe system fill quantity:
  • Condition: New

OEM-Number

98 00 7 772 80

13 23 T 9

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-21%
ABAKUS Expansion Tank, coolant
Article № : 032-026-001
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£ 18,58
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  • Supplementary Article/Info 2: with cap
  • Condition: New

OEM-Number

17 13 7 529 273

17 13 7 509 072

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-21%
TOPRAN Expansion Tank, coolant
Article № : 104 049
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£ 11,62
£ 9,18
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  • Supplementary Article/Info 2: without lid, with sensor
  • Heating/Cooling: with coolant level switch connection
  • Material: Plastic
  • Condition: New

OEM-Number

70 11 2 140 7B

70 11 2 140 7C

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ABAKUS Expansion Tank, coolant
Article № : 053-026-004
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£ 11,40
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  • Supplementary Article/Info 2: with sensor
  • Condition: New

OEM-Number

6Q 01 2 140 7B

6Q 01 2 140 7

6Q 01 2 140 7A

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-21%
FEBI BILSTEIN Expansion Tank, coolant
Article № : 02264
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  • Supplementary Article/Info 2: with sensor
  • Material: Plastic
  • Weight [kg]: 0,4
  • Condition: New

OEM-Number

1H 01 2 140 7A

1H 01 2 140 7

35 71 2 140 7C

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FEBI BILSTEIN Expansion Tank, coolant
Article № : 33550
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£ 37,47
£ 29,60
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  • Material: Plastic
  • Weight [kg]: 0,984
  • Condition: New

OEM-Number

17 11 7 573 781

17 13 7 787 039

17 11 7 573 751

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