Quote:
Originally Posted by mbonwick
Running it with the expansion cap off is meaningless, as it is a pressurised system.
Hardly surprising that the coolant starts to boil with no pressure to stop it.
How does it do with the cap on?
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Sorry, but not sure why you think the cap was off ? All of the observations noted were with the new cap securely in place ! : The volcano effect can be seen through the translucent plastic of the header tank.