Ningbo World Broad Hardware&Electrical Co., Ltd.
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Cylinder head bolt Custom

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home / Product / Automobile Bolt / Cylinder head bolt

Product

Cylinder head bolt Manufacturers

Ningbo World Broad as one of the Cylinder head bolt Manufacturers and Cylinder head bolt ODM Company in China, we provide custom Cylinder head bolt at a cheap price. And we have more than 20 years of production experience, a professional research and technical team that provides OEM and ODM for customers, and provides you with complete fastener solutions with technological innovation.
Customized

We have more than 20 years experience and we have an professional research&technical team to provide a OEM & ODM Cylinder head bolt to customers.

Cost

Some department have auto-machines which can reduce customers’ cost.

Quality

Passing ISO 9001 every year and having complete inspection machines. Besides, we have the research lab separately to develop new product. So we can provide the consistent high quality Cylinder head bolt products.

Diversity

We not only have high standard machines and various production department but also complete supply chain.These let us can provide the high standard and various Cylinder head bolt products.

Capacity

Our annual production capacity is over 5000 tons,we can meet the needs of different customers with different purchase quantity.

Service

We focus on developing high-quality fasteners products for top-end markets.Our products are in line with international standards,and are mainly exported to Europe, America, ANZ and other destinations around the world.

If you are interested in our products or have any questions, please consult us.

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Cylinder head bolt Industry Knowledge Extension

What are cylinder head bolts?
Cylinder head bolts are fasteners used to secure the cylinder head to the engine block of an internal combustion engine. They are usually made of high-strength steel and are designed to withstand the high stress and heat generated by the engine.


Tightening method of cylinder head bolts
1. If the bolts are manually tightened at one time, the pre-tightening force of the first tightened bolts will be greatly attenuated, and in some cases it will even become loose and fail, affecting the sealing of the cylinder head;
2. If tightening with a tightening machine, it is difficult for the bolts to reach at the same time, and the tightening force of the bolts that arrive first will drop more. Multiple tightenings usually begin with tightening to 50% of the specified torque. Usually, this torque can make the contact surface between the cylinder head bolts and the engine block close, and the interaction between the subsequent tightening bolts will be greatly reduced.
3. The cylinder head bolts of the diesel engine have a large number and a large diameter, generally 4? Eight bolts. This kind of multi-bolt fastener generally should be tightened according to the tightening sequence and tightening torque specified by the original factory;
4. If you don't know the original factory's regulations, you can tighten the tightening sequence evenly and symmetrically, from the inside to the outside, and from the middle to both ends, so as to ensure that the cylinder head can be leveled and pressed tightly. When tightening the bolts, it can be tightened according to the following procedures, that is, tighten to 1/3 of the specified torque value for the first time, tighten to 2/3 for the second time, and tighten to the specified value for the third time;
5. Then loosen the bolts to a completely loose state, tighten the bolts again to 1/2 of the specified value, and finally tighten to the specified value to complete the tightening cycle.