Now, here's why it's impossible for oil to be leaking out of these types of head gaskets, and in some cases, why it can't even leak out of some heads that do have pressurized oil going through them. A significant variance in compression readings between cylinders can suggest a head gasket leak, allowing oil to seep into the combustion chamber This test helps confirm if the head gasket is compromised and causing the oil leak. The head gasket is a seal that fits between the engine block and cylinder head, ensuring you keep compression in the combustion chamber and preventing coolant or engine oil from leaking into the cylinders. When the head gasket fails or “blows,” it can lead to a host of engine problems, some minor but many severe Recognizing the early warning signs can save you from costly repairs — or even worse, from replacing your engine altogether.
Although not directly related to the cylinder head, a damaged oil pan gasket can cause oil to leak near the cylinder head area, giving the illusion of an oil leak from the cylinder head.
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