engine cylinder head gasket

Cylinder head pad, referred to as the cylinder head gasket is placed between the cylinder block and the cylinder head of an elastic sealing element. Because between the block and the cylinder head can not be absolutely flat, therefore, we need to have a cylinder head gasket to prevent high-pressure gas, lubricating oil and cooling water sprang from between them.

there are two:
1. metal asbestos pad asbestos matrix, outsourcing copper or steel skin. Some with braided wire or rolled steel for the skeleton hole, some with metal ring around the cylinder bore, to increase the strength. The advantage is lower prices, but less strength. Because of asbestos carcinogenic to humans, in developed countries have stopped using.

2.metal pad made of a single piece of steel finishing, elastic relief at the seal, by relief of elastic and resistant sealant to seal role. It has been widely used in foreign countries. The advantages of high strength, good sealing effect, but higher cost.