CAR Coolant expansion tank
Coolant expansion tank: common defects and their signs
- 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.
- Valve jamming.
- Pressure in the cooling system increases.
- Pipes and clamps crack.
- The tank may inflate or explode.
- 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:
- After the engine cools down, drain cooling liquid into a spare container.
- Loosen the clamps of steam- and liquid-discharge hoses and remove them from the tank.
- Remove tank fasteners from the bracket.
- Lift and tilt the tank in the direction of the headlights to release it.
- Loosen the lower clamp and remove the hose from the tank pipe. Remove the tank.
- Install a new one in reverse order. Fill with antifreeze up to the mark on tank walls.
- Start the engine and check for leaks on tank walls and hoses.
Heating and ventilation Car parts:
Thermostat - Cooling fan - Oil cooler - Heater matrix - Radiator - Coolant flange - Water pump - Fan clutch - Radiator fan switch - Heater resistor - Radiator cap - Expansion tank cap

Coolant expansion tank / coolant reservoir Information
Coolant expansion tank / coolant reservoir: Bestsellers
RIDEX Coolant expansion tank
Article № : 397E0127
Read the product details
£ 10,60
(Price per item)
incl. 20% VAT, excl. delivery costs
- Supplementary Article / Supplementary Info Info 2: without sensor, without cap
- Colour: white
- Material: PP (Polypropylene)
- Condition: New
In stock
Read the product details
RIDEX Coolant expansion tank
Article № : 397E0008
Read the product details
£ 11,56
(Price per item)
incl. 20% VAT, excl. delivery costs
- Supplementary Article / Supplementary Info Info 2: without lid, with sensor
- Material: Plastic
- Heating/Cooling: with coolant level switch connection
- Condition: New
In stock
Read the product details
RIDEX Coolant expansion tank
Article № : 397E0040
Read the product details
£ 11,85
(Price per item)
incl. 20% VAT, excl. delivery costs
- Supplementary Article / Supplementary Info Info 2: with sensor, without lid
- Number of connectors: 2
- Weight [kg]: 0,319
- Condition: New
In stock
Read the product details
RIDEX Coolant expansion tank
Article № : 397E0156
Read the product details
£ 14,26
incl. 20% VAT, excl. delivery costs
- Supplementary Article / Supplementary Info Info 2: with sealing plug, with sensor
- Weight [g]: 493
- Material: Plastic
- Condition: New
In stock
Read the product details
NRF Coolant expansion tank
Article № : 454083
Read the product details
£ 16,36
incl. 20% VAT, excl. delivery costs
- Supplementary Article / Supplementary Info Info 2: with cap
- Condition: New
In stock
Read the product details
ORIGINAL IMPERIUM Coolant expansion tank
Article № : 29608
Read the product details
£ 17,86
incl. 20% VAT, excl. delivery costs
- Supplementary Article / Supplementary Info Info 2: with sealing plug
- for OE number: 4469385
- Weight [g]: 599
- Condition: New
In stock
Read the product details
TOPRAN Coolant expansion tank
Article № : 722 676
Read the product details
£ 14,33
incl. 20% VAT, excl. delivery costs
- Supplementary Article / Supplementary Info Info 2: without lid
- Observe system fill quantity:
- Material: Plastic
- Condition: New
In stock
Read the product details
ORIGINAL IMPERIUM Coolant expansion tank
Article № : 44215
Read the product details
£ 21,53
incl. 20% VAT, excl. delivery costs
- Supplementary Article / Supplementary Info Info 2: with sealing plug
- Weight [g]: 585
- Condition: New
In stock
Read the product details