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Valve stem seals, unlike many other seals in the engine, play a significant function in lubrication. Valve stem seals lubricate the valve stem as it passes through the valve guides with a regulated amount of oil. Therefore, you should monitor the amount of oil passing through the valve stem seal closely. Too little oil causes stem and guide damage; too much oil creates carbon formation, which causes valve seat deterioration, reduced volumetric efficiency, higher emissions, catalytic converter damage, and unnecessary oil consumption.
Valve stem seals keep the valve stem lubricated as it travels through the valve guide. A lack of oil causes stem and guide wear. Excessive oil increases oil usage and can result in carbon buildup, resulting in valve seat degradation and premature valve grind. Faulty valve stem seals increase oil consumption. Oil must not reach the combustion chamber due to more rigorous pollution regulations. These rules, coupled with the fact that today's engines run hotter and valves open and close 100,000 times per hour, necessitate the use of high-quality materials and cutting-edge technology in valve stem seals to provide a long-lasting seal. As a result, the necessity for valve stem seal repair has decreased. This job is normally done only when an engine head is being repaired nowadays.
Positive seals connect to the valve guide boss. They function similarly to a squeegee, cleaning and measuring oil from the stem as it goes past the seal.
Deflector seals deflect oil away from the valve stem, as the name suggests. They're also known as umbrella seals since they move with the valve stem to protect the valve guide from oil.
There are three basic varieties of synthetic rubber: nitrile, polyacrylate, and Viton??. The heat resistance of the three types of synthetic rubber seals is the most significant distinction. Inadequate heat resistance causes a synthetic rubber seal to stiffen and shatter early. This can cause seal degradation, with portions of the seal breaking off and obstructing the oiling system and oil collection screen, resulting in engine damage due to lubrication loss. As a result, Viton?? is used in many NAPA valve stem seals for late-model cars. Viton?? is the finest material for use in several of today's hotter-running engines, especially in smaller local and imported versions. It's frequently used in conjunction with a "metal jacket" or coating that completely encases the Viton?? positive seal. Viton?? is the material of choice for most Fel-Pro valve stem seals because it is resistant to heat (up to 450?? F) and wears.
Symptoms of a bad valve seal or piston ring are very identical. When either fails, the vehicle's performance will decrease, and other indications will appear. Let's take a look at some of the warning indications that these parts are failing:
If you detect thick blue-gray or light-gray smoke coming from your car, it's likely consuming oil. It's a symptom that oil is spilling into your engine's combustion chamber.
Oil will flow into the combustion chamber if the piston rings are burnt out, or the valve seal is damaged, as previously stated. This causes your engine's oil supply to deplete significantly more quickly.
Your engine will lower compression if the piston rings and valve seals are damaged. You will lose engine power as a result of this. Consequently, when you step on the gas pedal, you won't be able to speed up normally.
If you notice that your valve seals are damaged, get new oil seals installed by an auto specialist. Depending on the make and model of your vehicle, this replacement repair will cost depending on your auto shop. But, the typical cost of a valve seal is $30. Valve seal replacement involves removing the entire engine until the technician can reach the valve spring. The spark plugs, cylinder head cover, pushrods, and rocker arms should all be removed. The length of time this will take is mostly determined by the brand and type of your vehicle. The technician may need to disassemble and detach the cylinder head, then replace it with a cylinder kit that includes a cylinder head gasket.
From fitment help from our in-house experts to shipping packages, we'll take care of you and your Engine Valve Stem Seals every step of the way. We know how much of a financial investment you're making in a set of Engine Valve Stem Seals or accessories and upgrades. In return, we'll deliver a service and product that is second to none.
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