: For newer models or high-stress applications, a more rigorous two-step process is often recommended: Step 1 : Tighten to 75 lb-ft . Step 2 : Tighten to 145 lb-ft .
: Ensure the special thin-head hex bolt is installed in its marked position under the cam idler gears to avoid catastrophic mechanical failure. Alignment Check : Before final torquing, it is critical to use a dial indicator Cummins Isx Rear Structure Torque Specs