head bolt torque and block

[Steve Jones]

What a lot of talk (torque!!). I've used the same process for nearly 40 years on touring, trials and racing engines and it's always worked. Use a Torque Wrench and start with 5 lb ft. Then 10 lb ft. Follow with 15 lb ft. Finish with 19 lb ft. Leave overnight. Tighten again to 20 lb ft. Run the engine as normal and tighten back to 20 lb ft after each run until it tightens no further. If an alloy head, do the process after each run cold, if a CI head, warm.

Steve