Augusta head nut torque

[brian]

Fitting head back on engine - thought I knew torque setting but either never did know for sure or I cannot find a record. Any ideas?
I have an old letter from Arthur Keeling who reckoned (but did not know for sure as he was a Lambda man) up to 40ft-lbs and then tighten when hot to 50 but probably up to  70 was fine!
Another problem is my torque wrench is in g/km or some such non-Imperial measure!
Brian

[peteracs]

Hi

Conversion from ft lbs to Nm if that helps...

https://www.metric-conversions.org/energy-and-power/newton-meters-to-foot-pounds.htm

Peter

[lancialulu]

Fitting head back on engine - thought I knew torque setting but either never did know for sure or I cannot find a record. Any ideas?
I have an old letter from Arthur Keeling who reckoned (but did not know for sure as he was a Lambda man) up to 40ft-lbs and then tighten when hot to 50 but probably up to  70 was fine!
Another problem is my torque wrench is in g/km or some such non-Imperial measure!
Brian

maybe its a pre war thing but I have never heard of torquing a head when it is hot???

[DavidLaver]

Measure elongation

The other - more realistic - thought is to look up what that size stud would "normally" be torqued to.

[Kari]

The problem is not the strenght of the studs, but their attachments in the cylinder block.

I tighten in several steps from the inside outwards and cross-wise starting at 40Nm (30ft-lb) and then up to 85Nm (63ft-lb). After warming the engine, (not hot) a recheck ot two.

Regards  Karl

[brian]

Many thanks. It looks as if Arthur was about right!
Brian