21-08-2018, 02:22 PM
Tightening torque is partly used to generate axial force, and partly to overcome friction. The lower the friction the higher the clamp force. This is important in critical fasteners like big end bolts as you may take the bolt into yield, or conversely it may be insufficiently tight. You are right to worry Simon; and Stuart, I share your doubt about fancy lubes.
Last time I had to ask this question the reply I got was 'in engine assembly condition', which meant with oil. However I know nothing about Phoenix or where your spec came from - may be best to go back to them or the bolt supplier. If all else fails you could conduct a torque - angle test to establish yield point and work backwards.
Last time I had to ask this question the reply I got was 'in engine assembly condition', which meant with oil. However I know nothing about Phoenix or where your spec came from - may be best to go back to them or the bolt supplier. If all else fails you could conduct a torque - angle test to establish yield point and work backwards.