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Title: Augusta head nut torque Post by: brian on 02 June, 2020, 05:33:46 PM 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 Title: Re: Augusta head nut torque Post by: peteracs on 02 June, 2020, 05:58:41 PM 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 Title: Re: Augusta head nut torque Post by: lancialulu on 02 June, 2020, 07:29:15 PM 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? maybe its a pre war thing but I have never heard of torquing a head when it is hot???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 Title: Re: Augusta head nut torque Post by: DavidLaver on 02 June, 2020, 08:27:38 PM Measure elongation :) The other - more realistic - thought is to look up what that size stud would "normally" be torqued to. Title: Re: Augusta head nut torque Post by: Kari on 03 June, 2020, 07:55:25 AM 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 Title: Re: Augusta head nut torque Post by: brian on 03 June, 2020, 08:15:32 AM Many thanks. It looks as if Arthur was about right!
Brian |