Cylinder Head tightening.

[Trevor Wilks]

I have tightened down my refurbished 406 cylinder head according to the routine outlined in the 404/405 workshop manual, and a new gasket supplied by the Bristol Owners and Drivers Association.

What is considered best practice with regard to further tightening? I have been used to a further check on tightness after approx. 500 miles, but also remember that Alvis (Red Triangle) advised re torqueing their heads after running the engine up to temperature for the first time.

What do those who have done this job on a Bristol 6, consider to be best practice?