K-Series Coolant Expansion Tank Failure

When checking the engine oil or coolant level of your K-Series Elise, Exige or 340R it is essential to also inspect the coolant expansion tank closely for cracking or splits. The older the vehicle, the more likely the tank will have become brittle and ‘crazed’ as can be seen in our video.

The solution however is very simple: replace the tank and cap when you notice the crazing appear!  Failure to spot this in good time will cause a gradual over-heating of the engine when the cooling system is unable to achieve the pressure required to keep temperatures down and the coolant moving efficiently around the system. Replacement is quick and simple and avoids potential head-gasket problems in the future.

You can purchase a new expansion tank and pressure cap from our online store here.

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