Engine valve
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  • Valves are used to control gas flow to and from cylinders in automotive internal combustion engines. The most common type of valve used is the poppet valve.
  • The valve itself consists of a disc-shaped head having a stem extending from its centre at one side. The edge of the head on the side nearest the stem is accurately ground at an angle usually 45 degrees, but sometimes 30 degrees, to form the seating face. When the valve is closed, the face is pressed in contact with a similarly ground seat.
  • The valve seat in an internal combustion gasoline or diesel engine is the surface against which an intake or an exhaust valve rests during the portion of the engine operating cycle when that valve is closed.
  • The valve seat is a critical component of an engine in that if it is improperly positioned, oriented, or formed during manufacture, valve leakage will occur which will adversely affect the engine compression ratio and therefore the engine efficiency, performance (horsepower), exhaust emissions, and engine life.
  • Valve seats are often formed by first press-fitting an approximately cylindrical piece of a hardened metal alloy, such as Stellite, into a cast depression in a cylinder head above each eventual valve stem position, and then machining a conical-section surface into the valve seat that will mate with a corresponding conical-section of the corresponding valve.
  • Valves are subject to both thermal and mechanical loads,the latter being applied by the springs and actuating gear. All these loads are so severe as to justify an assertion that the valves are the most heavily loaded components in an engine.
  • Exhaust valves , in particular , operate for long periods at high temperatures 700-800.
  • Valve seats are an extremely important part of a cylinder head because the seats cool and seal the valves. They also support the valve when it closes, which affects both valve train geometry and valve lash.
  • If a seat is damaged, cracked, loose, receded or too badly worn to be recut or reground, it can cause a variety of problems: loss of compression, valve burning, valve failure, valve train wear and breakage, even head and valve damage if the seat comes loose.
  • Seats should not be replaced until the head has been thoroughly cleaned and inspected. This includes checking for cracks (especially around and near the valve seats) and checking the deck surface and cam bore for straightness. Any welding and/or straightening that may be needed must be done before remachining the valve seats or installing new inserts.
  • Also, the valve guides should be replaced or reconditioned before the seats are machined. Concentricity between the seat and guide is absolutely essential for a proper alignment, good compression and long term valve durability.
  • The cylinder head must be dimensionally and geometrically within specifications before seat counterbores are machined. That includes cylinder head thickness, valve guide clearances, concentricity and perpendicularity. There should be no warping, twisting or any type of misalignment anywhere in the head.
  • PEP-PRO Engine Valves were introduced to the Australian market in 1985, in response to a growing demand from the performance aftermarket industry. The initial launch with Chevrolet, Datsun, Ford and Holden valves has seen the Pep-Pro brand become the choice of many engine builders across Australia.
  • The automotive parts industry has undergone a significant change in the recent past. There has been a considerable shift in cars and components, production methods and materials. Driven by expanding demand in the Asian economies and new product developments, worldwide pistons, piston rings and engine valves market is forecast to reach 2.5 billion units by 2010.
  • Engine valves market is forecast to witness the fastest growth at a CAGR of over 3% over the period 2000-2010.
  • Most engine subsystems can be implemented using different technologies, and better technologies can improve the performance of the engine.
  • The valve train consists of the valves and a mechanism that opens and closes them. The opening and closing system is called a camshaft. The camshaft has lobes on it that move the valves up and down.
  • Valve seat
  • Valve Train
  • Summary on valves
  • Global Automobile Industry: Changing with Times


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  • Valve Regulated Lead Acid Battery
  • Valve Purge Compound
  • Valve pack
  • Valve lubricant and sealant
  • Valve- Engine Valve & Lifter Cleaner
  • Valve action paint marker


  • New Valve Bridge and Lash Adjuster
  • Manton product catalogue
  • Cummins valve
  • Engine valve seat
  • Engine valve EX
  • Alfa romeo 4-cylinder valve train
  • Nissan Sr20de Engine Build Up Intake Valve Seat
  • Valve seats


  • How to install valve retainers and keepers
  • Titanium Engine Valve Installation Guide
  • How to Install Valve Seals in a 350 Engine
  • Rock Solid Engines - Reed Valve Installation
  • Valve spring and retainer installation
  • How to install Intake and Exhaust Valves
  • Valve Seat Installation Procedures

Manufacturing process

  • Engine valve and valve seat manufacturing
  • Valve Manufacturing Industry
  • Engine valve manufacturing process
  • Valves - Manufacturing process
  • How to Make a Valve
  • Production of Engine valves
  • Valve manufacturers
  • Manufacturing valves at egge machine company
  • Valve making process

Raw material suppliers

  • Casting materials
  • Lead
  • Phenol
  • Steel rods
  • Toluene
  • Xylene

Machinery suppliers

  • Suppliers from Bangalore
  • Suppliers from Chennai
  • Suppliers from Maharashtra
  • Suppliers from Punjab
  • Suppliers from Taiwan
  • Suppliers from U.K


  • Engine technologies
  • F1 Engines _ Valve technology
  • Nissan Introduces New Engine Valve Control Technology - Variable Valve Event & Lift
  • Laser sensor motion control system with application to engine valve seat metrology
  • New engine technology - Spring less valves


  • Pre-oxidation of engine valves and seat inserts for improved life
  • Engine valve
  • Engine valve actuation system
  • Engine valve driving apparatus
  • Lightweight composite engine valve
  • Electro hydraulic engine valve actuator assembly
  • Chrome plated engine valve
  • Hydraulically-assisted engine valve actuator
  • Valve seal for rotary valve engine
  • Valve operating system for multi-valve engine
  • Reducing engine emissions on an engine with electromechanical valves

Working of Engine valves

  • Car engine valves
  • How car engines work
  • Working of Relief valve


  • Car Engine Valve Guide and Valve Rotation
  • Car Engine Valve Operation and Geometry
  • How to Locate the Engine Valve Cover in a Car
  • Valve rod machining
  • Replacing valves on engine
  • Toyota variable valve timing
  • Valve seats
  • Suppliers of Engine valves
  • Manufacturers of Engine valves
  • Selling leads of Engine valves
  • Engine valves Suppliers
  • Exporters of Engine valves
  • Supplier from Aurangabad

Company profiles

  • Company from Ahmedabad
  • Company from Bangalore
  • Another company from Bangalore
  • Company from Chennai
  • Company from England
  • Company from Gujarat
  • Company from Israel
  • Company from Italia
  • Company from Mumbai
  • Company from Pakistan
  • List of manufacturers


  • Consultancy from Indore
  • Consultancy from New York
  • Consultancy from U.S.A
  • Online Consultancy1
  • Online Consultancy2
Manufacturing plants
  • Manufacturing plant from Chennai
  • Manufacturing plant from Gujarat
  • Manufacturing plant from Karnataka
  • Manufacturing plant from Pune
  • Manufacturing plant from Uttar Pradesh


  • Pre-pro market
  • World Pistons, Piston Rings and Engine Valves Market to Reach 2.5 Billion units by 2010
  • Rane engine valve pricing
  •  4-valve engines attracted customers
  • Eaton Invests in New Engine Valve Facility to Meet Growing Demand in Chinese Automotive Market


  • Auto turning fuel valve
  • Composite in Engine Valve Guides
  • Solenoid Actuated Valve Control
  • Use of decompression valves in the IC engine of hybrid cars to improve its brake force regeneration.
  • Electronic Valve Actuation


  • 302ci Engine OEM Valvetrain Adjustment
  • Composite engine valves?
  • Magnetically-Actuated Engine Valve
  • Materials for Advanced Engine Valve Train
  • In-line Inspection of Engine Valve Seats
  • Automotive engine valve recession


  • Automobile vale manufacturing- Technical and economic analysis
  • Premium engine valve
  • Nitromet
  • The impact of valve events upon engine performance and emissions
  • Automatic Mesh Generation
  • Valve lash adjustments


  • Valve timing diagram of four cycle diesel engine
  • Eaton US Engine Valve
  • Repetitive Control of an Electro-Hydraulic Engine Valve Actuation System
  • Engine Valve Lash - Inspect/Adjust
  • Identification of Engine Valve Deposits
  • Formation of Nitride Layers in the Nitro carburizing of Engine Valves
  • The 2.0l FSI engine with 4-valve technology
  • Effect of advancing the closing angle of the intake valves on diffusion-controlled combustion in a HD Diesel engine
  • Auto loading of Engine Valves


  • Honda Civic Natural Gas has green rewards, challenges
  • Daily & Fortnightly Report on New & Upcoming Projects in India.
  • Hyundai i-Gen i20 road test 20
  • Eaton invests in manufacturing of engine valves for fuel efficient car engines
  • Toyota: Engine trouble

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