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Check your anti-freeze level. In addition to thermostat and water pump issues on some Cruzen, I suspect many of them came from the factory with low levels of anti-freeze and air bubbles in the system. The latter can lead to apparent leaks that don't really exist as the air bubbles work their way to the overflow/fill tank.
Agreed. Check the coolant level in the overflow tank. The sporadic heat tells me it's low without looking.

Next, check the area around the water pump and thermostat housing for leaks. Or, bring it into the dealer to have them check it for leaks. IIRC at least the water pump is covered under the powertrain warranty. If you have the 3/36 warranty still in effect, even better.
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