The screw on the engine cylinder head is not as tight as possible. It needs to be operated according to the corresponding torque, otherwise it will easily cause unnecessary trouble. So, how many kilograms the cylinder head screws are screwed, let's discuss it together today.
Actually, the kilogram force required to tighten the cylinder head screw depends on the size of the bolt. Generally, the cylinder head screw of the engine needs to be tightened 8-9 kilograms, the connecting rod is 5-6 kilograms, and the crankshaft is 10 kilograms. The requirements of the instruction manual. But as the saying goes, practice makes perfect. After you are proficient and experienced, even if there is no specific standard data, you can still judge by the feel of the tightening.
How to tighten cylinder head screws:
1. First screw from the middle to both sides, and for the first time, screw 50% of the final torque, then loosen it all.
2. Then twist 50% from the middle to both sides.
3. Finally, tighten the cylinder head screws in the middle first and then both sides.
But don't overtighten it, otherwise it will cause excessive force on the bolt, which will not only cause slippage of the internal thread, but it is also possible to pull it off directly. Therefore, before tightening, you must always determine the size of the bolt torque.
Engine screw torque comparison table
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