The rod bolts are hand started into the rods.
The second set of rods is installed.
The rods are lightly torqued down with an electric impact. The crank is flipped over and the other two rods are installed.
Next, the crank and rods are placed into this bespoke assembly fixture so they can be held firmly without damage while the rod bolts are finally tightened. IAG uses bolt stretch to reach the correct torque. The amount of bolt stretch is measured with the special micrometer from ARP.
When the bolts are tightened they are marked with a confirmation mark. This way no bolts will be forgotten.
All the rod bolts are tightened via this method.