How many kilograms for cylinder head bolts?

[DelMichael]

Cylinder head bolts weigh around eight to nine kilograms. The method for tightening cylinder head bolts in an engine is as follows: 1. Tighten from the center outward to 50% of the final torque, then loosen all; 2. Then tighten from the center outward to 50% again, and finally tighten in the order of center first and then both sides. Engine cylinder heads can be divided into two types: 1. Side-valve engine cylinder head: Cast with water jacket, inlet hole, outlet hole, spark plug hole, bolt hole, combustion chamber, etc.; 2. Overhead-valve engine cylinder head: In addition to the cooling water jacket, there are also valve mechanisms, intake and exhaust passages, etc.