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Overflow & Expansion Tanks


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Dayco Coolant Overflow Bottle - DOT0083

Dayco Coolant Overflow Bottle - DOT0083

Check fitment
$174
Fitment Notes:
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Dayco Coolant Expansion Tank - DET0002

Dayco Coolant Expansion Tank - DET0002

Check fitment
$116
Fitment Notes:
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Dayco Coolant Expansion Tank

Dayco Coolant Expansion Tank

Check fitment
$111
Fitment Notes:
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Dayco Coolant Overflow Bottle - DOT0048

Dayco Coolant Overflow Bottle - DOT0048

Check fitment
$91
Fitment Notes:
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Dayco Coolant Expansion Tank - DET0082

Dayco Coolant Expansion Tank - DET0082

Check fitment
$280
Fitment Notes:
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Dayco Coolant Expansion Tank - DET0010

Dayco Coolant Expansion Tank - DET0010

Check fitment
$92
Fitment Notes:
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Dayco Coolant Overflow Bottle - DOT0025

Dayco Coolant Overflow Bottle - DOT0025

Check fitment
$103
Fitment Notes:
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Little Trees Air Fresheners 1pk

Freshen up your vehicle interior with a classic Little Trees Car Air Freshener.

Dayco Coolant Expansion Tank - DET0042

Dayco Coolant Expansion Tank - DET0042

Check fitment
$256
Fitment Notes:
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Goss Coolant Expansion Tank - CB122

Goss Coolant Expansion Tank - CB122

Check fitment
$108
Fitment Notes:
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Dayco Coolant Expansion Tank - DET0013

Dayco Coolant Expansion Tank - DET0013

Check fitment
$196
Fitment Notes:
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Dayco Coolant Overflow Bottle - DOT0078

Dayco Coolant Overflow Bottle - DOT0078

Check fitment
$136
Fitment Notes:
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Dayco Coolant Overflow Bottle - DOT0006

Dayco Coolant Overflow Bottle - DOT0006

Check fitment
$87
Fitment Notes:
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Dayco Radiator Expansion Tank - DET0091

Dayco Radiator Expansion Tank - DET0091

Check fitment
$189
Fitment Notes:
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Goss Coolant Expansion Tank - CB102

Goss Coolant Expansion Tank - CB102

Check fitment
$243
Fitment Notes:
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Dayco Coolant Expansion Tank - DET0059

Dayco Coolant Expansion Tank - DET0059

Check fitment
$236
Fitment Notes:
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Dayco Radiator Expansion Tank - DET0094

Dayco Radiator Expansion Tank - DET0094

Check fitment
$217
Fitment Notes:
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Goss Coolant Expansion Tank - CB162

Goss Coolant Expansion Tank - CB162

Check fitment
$70
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Dayco Coolant Expansion Tank - DET0084

Dayco Coolant Expansion Tank - DET0084

Check fitment
$278
Fitment Notes:
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Dayco Coolant Expansion Tank - DET0044

Dayco Coolant Expansion Tank - DET0044

Check fitment
$101
Fitment Notes:
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Dayco Coolant Overflow Bottle - DOT0005

Dayco Coolant Overflow Bottle - DOT0005

Check fitment
$118
Fitment Notes:
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Dayco Coolant Expansion Tank - DET0016

Dayco Coolant Expansion Tank - DET0016

Check fitment
$114
Fitment Notes:
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Dayco Coolant Overflow Bottle

Dayco Coolant Overflow Bottle

Check fitment
$119
Fitment Notes:
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Dayco Coolant Overflow Bottle - DOT0011

Dayco Coolant Overflow Bottle - DOT0011

Check fitment
$71
Fitment Notes:
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Dayco Coolant Expansion Tank - DET0088

Dayco Coolant Expansion Tank - DET0088

Check fitment
$295
Fitment Notes:
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Goss Coolant Expansion Tank - CB137

Goss Coolant Expansion Tank - CB137

Check fitment
$84
Fitment Notes:
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Dayco Coolant Expansion Tank - DET0086

Dayco Coolant Expansion Tank - DET0086

Check fitment
$370
Fitment Notes:
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Dayco Coolant Expansion Tank

Dayco Coolant Expansion Tank

Check fitment
$109
Fitment Notes:
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Dayco Coolant Expansion Tank - DET0020

Dayco Coolant Expansion Tank - DET0020

Check fitment
$170
Fitment Notes:
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Dayco Coolant Expansion Tank - DET0071

Dayco Coolant Expansion Tank - DET0071

Check fitment
$213
Fitment Notes:
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Dayco Coolant Expansion Tank - DET0085

Dayco Coolant Expansion Tank - DET0085

Check fitment
$358
Fitment Notes:
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Dayco Coolant Expansion Tank - DET0102

Dayco Coolant Expansion Tank - DET0102

Check fitment
$185
Fitment Notes:
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Dayco Coolant Expansion Tank - DET0070

Dayco Coolant Expansion Tank - DET0070

Check fitment
$422
Fitment Notes:
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Dayco Coolant Expansion Tank - DET0041

Dayco Coolant Expansion Tank - DET0041

Check fitment
$295
Fitment Notes:
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Dayco Coolant Expansion Tank - DET0003

Dayco Coolant Expansion Tank - DET0003

Check fitment
$109
Fitment Notes:
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Dayco Coolant Expansion Tank - DET0034

Dayco Coolant Expansion Tank - DET0034

Check fitment
$213
Fitment Notes:
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Dayco Coolant Expansion Tank - DET0073

Dayco Coolant Expansion Tank - DET0073

Check fitment
$351
Fitment Notes:
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Showing 1 - 39 of 91 products

Radiator overflow and expansion tanks

Radiator overflow or expansion tank damaged or starting to leak or seep coolant? Gone that brown colour, so you can't see the coolant level? Get in-store or online today to find your replacement overflow or expansion tank with Repco. Offering you the most reputable brands, including Dayco, Swag, and AllCrash.

Popular Questions Asked

What does a radiator overflow tank do?

The radiator overflow or radiator expansion tank in your vehicle's cooling system is designed to capture coolant as it is expelled from your cooling system as it heats up. With this system being pressurized it will also draw back this coolant back in from the tank to making the cooling system operate as a closed system.

Why do I need a radiator overflow or expansion tank?

The reason you need to replace these overflow tanks is a coolant leak through a cracked or damaged tank or a stained coolant tank, so you can't see the coolant level in the tank. This is bad as not knowing the correct level will force excess coolant out of the overflow onto the road, or not enough coolant will cause overheating, where the steam and gas pressure forces the remaining coolant out of the overflow and onto the road.

Pretty much all liquid-cooled engines use this system. Whether they are called a recovery tank, factory expansion tank or radiator overflow tanks, they all basically perform the same function. As cooling systems go through their heating and cooling cycles, the overflow tank typically allows the coolant level to rise and fall. Some have a pressurised radiator cap located on the tank, some have this cap on the radiator itself. Care must still be taken when hot, as the pressurised radiator cap can cause nasty burns from rapidly expanding coolant if not done correctly. Hot coolant fills are best avoided for this reason.

What are the signs my overflow or expansion tank is bad?

There is an array of different signs that indicate that you need a replacement overflow tank. Keep in mind some of these symptoms can occur if other cooling components are not working correctly. If in doubt, get in contact with your local Repco Authorised mechanic or get in contact with your local Repco store, who might be able to recommend a local mechanic.

  • Notice coolant leaks
  • Notice low levels of coolant and having to consistently fill up with coolant.
  • Engine overheating

Our range of quality radiator overflow and expansion tanks

Coolant expansion tanks are vehicle specific and come in all sorts of odd shapes and sizes, and are usually made of translucent plastic so you can see the coolant level. At Repco, we have an extensive range of popular tanks in stock or you can order in units if required, so you get the exact tank you need. Browse our website to see our extensive range of cooling system products