What is the torque specification for the cylinder head bolts of Wuling Hongguang?
2 Answers
The torque specification for the cylinder head bolts of Wuling Hongguang is 103 N·m. Method for tightening the cylinder head bolts of Wuling Hongguang: First, tighten from the center outward to both sides. Initially, tighten to 50% of the final torque, then completely loosen all bolts. Next, tighten again from the center outward to 50% of the final torque. Finally, tighten the cylinder head bolts fully, following the sequence of center first and then both sides. Preventive measures for cylinder head cracks in Wuling Hongguang: Cylinder head bolts should be evenly tightened, the fuel injection timing should be correctly adjusted, soft water should be used in the radiator with minimal water changes, and the engine should avoid prolonged operation under overload conditions.
Last time I disassembled the Wuling Hongguang's engine, the cylinder head bolt torque was around 85 Newton meters. I usually tighten them in three steps: first the center bolts at 45 Nm, then cross-tighten the side bolts to 70 Nm, and finally fully tighten all to 85 Nm. The sequence is crucial - working from the center outward prevents cylinder head deformation. Too loose torque may cause gas or oil leaks, while over-tightening risks snapping bolts and engine failure, so always use a reliable torque wrench. Remember, torque specs vary by model - for instance, a 1.2L engine may require slightly less, while a 1.5L needs marginally more, though 80-100 Nm is the typical range. When unsure, always consult the factory manual or seek professional help at a repair shop. Engine repair isn't child's play - sealing issues directly impact longevity, so never cut corners here.
