How much torque should be applied to cylinder head bolts?

[VanLaura]

Tire bolt torque is generally around 100-120 Nm. Below is more information about tire bolt torque: 1. Different vehicle models require different torque: The specific value should be checked in the manual for the indicated Nm, but some current vehicles use bolts instead of traditional nuts, and the torque should be smaller. 2. Hazards of tire bolt issues: The primary problem is the potential for the wheel to be thrown off due to a sudden bolt breakage. 3. Cracking: Tire bolts should not be over-tightened, as excessive torque can cause stretching of the bolt threads and even lead to cracking. Additionally, there is a specific tightening sequence principle for tire bolts.

[OValeria]

With over 20 years of auto repair experience, I know cylinder head bolts demand precision. Torque specs vary drastically between engines - an old Jetta 1.6L requires about 85 N·m while a BMW N20 turbo needs 130 N·m. The critical three-stage tightening process: pre-torque to 30%, then 70%, finally achieving stepped torque per manual. Aluminum heads demand star-pattern tightening from center outward - skipping this once caused an apprentice's engine to leak coolant overnight. Modern vehicles use angle torque method where the ratchet's 'click' matters more than torque wrenches alone.