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1. Ensure both mating surfaces are clean and free of dirt and oil.
2. Do not clean block threads with a thread tap. Use an old head bolt with a cleaning groove cut the length of the thread to thoroughly clean block threads.
3. Make sure new torque to yeild head bolts are always used. Ensure a light covering of engine oil is applied to the threads and under the bolt head and washer.
4. Ensure the correct torque settings and sequence is employed.
5. Multi-layer steel (mls) head gaskets: flush block of any remaining anti-freeze, do not add any new anti-freeze to coolant system until engine has travelled a minimum of 600kms. To ensure the gasket has the best possible chance to seal correctly.
6. Fuel injectors must be checked for correct operation and serviced if required.

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	Clean Surfaces		Use an old bolt to clean threads		No anti-freeze for min 600kms
	Oil head bolts		Correct torque procedure?		Service the injectors