You may have heard the term “valve job” because older engines frequently needed their valves reconditioned. You rarely hear about valve problems in today’s engines because modern OHC engines have fewer components to wear out and fail. Most modern engines valve trains are virtually trouble-free.
A valve job is an operation which is performed on any four stroke cycle, internal combustion engine, the purpose of which is to resurface the mating surfaces of the poppet valves and their respective valve seats that control the intake and exhaust of the air/fuel mixture that powers the motion of the pistons after the start cycle.. In the earliest automotive engines, the valves needed to be ...
Cylinder head Valve Jobs on Gas/Diesel, Aluminum/Cast iron, Import & domestic. Pressure test, Resurface, Grind valves, Cut valve seat, Install guides & more 818 767-6603 CALL
If the engine is under 100,000 miles or so, and a valve job is needed because of damage caused by a broken timing belt (or chain) then a valve service may be all that is required. If the engine is high mileage, with normal associated wear, or if it is using oil or has significant sludge deposits then a remanufactured engine may be the best choice.
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The valves are inspected for wear such as bending, overheating and cracking. If they are good and can be reused, the seats will be ground to match the new sealing surface of the valve seats. The valve springs, rocker arms, push rods, and lifters are all inspected to make sure all parts are reusable and do not need replacement.
A valve job is removing the cylinder head(s) from the engine so the valves, guides and seats can be refurbished to restore compression and oil control. A valve job may be necessary by the time an engine has 80,000 or more miles on it, or to fix a "burned valve," compression or oil burning problem.
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Engines use valves to control airflow for both the intake and exhaust systems. While sealing cylinder pressure is also important, performance-engine builders know that proper angles employed on a valve job can have a tremendous effect on airflow. And we all know that airflow is the key to making power.