Push down on the compressor and carefully remove the split valve keepers. Take great care not drop the valve keepers into the engine. Remove the valve spring. Pull the old seal off the valve stem and replace it with a new valve seal.
Why do valve seals leak?
Your car may be suffering from a valve seal leak. These types of leaks are normally due to the age and/or high milage of the vehicle or could also leak due to the vehicle being stored for an extended period of time.
Can bad valve stem seals cause misfire?
A positive valve stem seal provides a tighter seal; which reduces the amount of oil that enters the guides. Worn valve guides and seals will allow air to leak. As a result, causing lean misfire and a rough idle.
What can I use for valve seals?
Fel-Pro uses a variety of materials including nylon, PTFE, rubber, steel and synthetic rubber or some combination of these. FKM, fluoroelastomer, is used in many Fel-Pro valve stem seals for hotter-running, late-model vehicles.
Related Question how to replace valve seals
What happens if valves are not seated properly?
Engine Power Loss
If your valve guides and seals are leaking, oil can accumulate on the top of the valve and cause it lose its seat or create a gap. This could cause compression issues, which lead to poor combustion and power loss. Have your oil changed regularly, and fix any other engine problems promptly.