This cylinder head bolt set is used to fasten the cylinder head securely to the engine block in your Nissan Navara D22 ZD30Di engine. These bolts are responsible for maintaining the immense pressure created during the combustion cycle and ensuring the head gasket remains perfectly sealed.
These bolts are a critical component that must be replaced any time the cylinder head is removed. They are Torque-to-Yield (TTY), or "stretch" bolts, meaning they are designed to permanently stretch when tightened to the correct specification. This one-time stretch provides the precise and even clamping force required to seal the head gasket effectively. Once stretched, they lose their elasticity and cannot be safely reused.
Failing to replace old head bolts during a cylinder head service will almost certainly lead to an improper seal. This can cause the new head gasket to fail prematurely, resulting in coolant and oil mixing, severe engine overheating, loss of compression, and potentially catastrophic engine damage that could require a complete and costly engine replacement.
This part has been designed to fit
Please check vehicle fitment to confirm compatibility with your vehicle. Please contact us with your VIN details if you require further assistance to confirm fitment.
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