I have a quick question.
I have looked at old list posts on the XJ40 forum on jag-lovers.org and I have found the following information on cylinder head bolt torque:
“The cylinder head must be torque tightened as follows:
Following the sequence shown in Fig 1, tighten the cylinder
head bolts to 59 - 61 Nm.
NOTE: Ensure that the camshaft is still on TDC using the
service Tool 18G1433 (Fig 2).
Then rotate the bolts clockwise in sequence through exactly
90 degrees using Special Tool LST122 or a self-manufactured
tool of the dimensions given in Fig 3.”
What I am wondering is if these torque specifications are for dry bolts and threads (in the block) or if this is a lubricated thread value.
I.E. should I be putting oil or some other lubricant on the threads of the cylinder head bolts prior to torquing them down or not?