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Empirical Test for Cylinder Head Gasket Integrity

Model: (Various brands) Various
Part: Checks and maintenance

In an internal combustion engine, there is a gasket that separates the combustion chambers from the cooling circuit. Failure of this component can lead to serious damage if not addressed promptly. Here’s a simple "home" test to perform if you suspect issues, such as unusual coolant consumption. Open the bonnet and locate the coolant expansion tank; remove the cap and replace it with an elastic balloon or a latex glove. Start the engine and let it idle for a few minutes. If the balloon does not inflate, all is well; however, if the balloon inflates, it indicates that combustion gases are passing through the gasket, and it’s advisable to intervene as soon as possible.

Updated on 18 August 2026 by ScegliAuto

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