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How to Check if the Cylinder Head is Blown

Model: (Various brands) Various
Part: Engine

In this video, you will learn how to identify a classic symptom of a blown cylinder head; open the bonnet and check the radiator water cap. Inside the cap, once opened, you will see a kind of sludge, which is the emulsification of the fluid, and also inside the reservoir, there is no liquid, just a sort of semi-liquid paste that does not bode well. This is a classic example of what happens when the head gasket is blown; the coolant has thickened into that kind of glue, which obviously can no longer cool the engine.

Updated on 12 July 2026 by ScegliAuto

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