I have read the procedure for tightening the 12mm stretch to yield head bolts in the Haynes and Bentley manuals. Both give a base torque, the instruct that an additional turn of 180 be given to the bolts. Man, I could manage a 90, but not 180. I'm used to head bolt torques of 105-120 on US V8s, but trying for that 180 felt like I was gonna twist the bolt off.
How do you folks do this? Was I too cautious?
these were new stretch bolts, slightly oiled going into to clean threaded holes?
now you are turning them an additional 180 degrees (1/2 of a complete turn of the bolt)...................not 180 ftlbs? You might feel them stretch too! 8^) Had to ask that!
later, dave (One out of many daves)
Yes.
Good one!
I seem to remember the manual saying to torque, run X miles, then do a quarter turn.
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