How much torque is the cylinder head screw of the car, and the torque of the cylinder head screw of various engine models

A car cylinder head screw has a torque. If it is tightened too tightly, it is likely to damage the thread. So, how much torque is the car cylinder head screw, today we will reveal it to everyone.

Actually, the torque for tightening the cylinder head screw needs to be determined according to the size of the bolt. Generally, the engine cylinder head screw needs to be tightened to eight or nine kilograms, the connecting rod is five to six kilograms, and the crankshaft is ten kilograms. Require. 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 the bolt to be overstressed, which will not only cause slippage of the internal thread, but also the bolt has a certain chance of deforming, and it is even possible to pull it off directly. Therefore, before tightening, you must always determine the size of the bolt torque.

Cylinder head screw torque of various engine models