Exhaust valve for automobile

Spare: Exhaust valve original

Information - Exhaust valve

The main purpose of the valve is to open or close the inlet or outlet hole, which is located in the cylinder head (overhead valve) or in the cylinder blocks (L head mechanism). Exhaust valve consists of two components - the head and the rod. Exhaust valve fulfils just two functions. First, it must well perform an insulating function of the cylinder during the compression and combustion strokes both of the intake and the exhaust pipe. Second, when the valve is open, it provides the least possible resistance to the movement of gases. It is also worth noting that the resistance decrease when gases flow the valve, provides a smooth passing from the head to the rod.

Along with other parts of the gas distribution mechanism, such as a rod or tappet, the exhaust valve must be light. This is because of the fact that when the reciprocating motion, there should not occur a large inertia force. As for a tight fit of the parts directly to the saddle, on the lower side of the exhaust valve head there is a chamfer at an angle of 45 ° or at an angle of 30 °, which is obligatory grinded. In car engines the most commonly used exhaust valves are the valves with flat or tulip heads. Valves with flat heads are lighter and their heating surface is smaller.

If you have any problems with the failed parts of the gas distribution mechanism, do not give way to despair! Before you decide to go to the service centre to replace the parts, visit our online store to purchase the necessary original spare part at a reasonable price. Regardless of whether you need a timing belt, toothed wheel or a middle silencer, you can always find the right auto parts in our vast catalogue. Moreover, sometimes garages may not have the parts you need and you need to wait a few weeks until they get it.

This is because they do not work directly with suppliers of spare parts. When ordering in our online shop, you can be sure that the product will be in your hands just in a few working days!

What you need to know about exhaust valve: lifetime limits, common defects and their signs, tips and recommendations

The exhaust valve has no exact lifetime limit. Terms of part operation depend on quality of used oil and also whether proper octane rating fuel is used. Replacement of the waste gases exhaust valve is performed in case of its burning-out, and consequent appearance of shears and cracks.

Presence of exhaust valve defect is indicated by unstable operation and specific noise of the engine, jerks of the car at accelerator pedal pressing, engine power loss and etc.

Precise diagnostics of part condition can be performed by specialists at a service station. It will be necessary to remove the cylinder head – this is quite laborious process, which requires skill in engine works. Employees of a car service station will check the cylinders with the help of a compression gauge and define, which exact valve is broken down.

It is advised to perform replacement of the burnt mixture exhaust valve also at a service station. Improper engine assembling may lead to its expensive repair or total replacement. Installation of a new valve oil seal, sleeve or seat may become necessary along with the exhaust valve – this will be decided by a car service station specialist after their visual inspection.

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