Valves allow gases to flow in and out of the cylinders, and seal the combustion chambers so compression can develop. They open and close in response to the lobes on the camshaft via the valvetrain. The air/fuel mixture flows in when the intake valve opens, and the spent exhaust gases flow out when the exhaust valve opens after the power stroke. Every engine has at least one intake and exhaust valve, while many have a pair of each.

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    • (1 review)
      # sp28905
      Engine Exhaust Valve by Melling®. Designed utilizing the latest technology, this Engine Exhaust Valve by Melling features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $0.37 - $10.49
    • (0 reviews)
      # sp11952
      Replacement Lifter by Melling®. Melling Lifters/Tappets are designed and built to get the job done while ensuring efficient performance and quiet valve train operation.
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $3.77 - $109.13
    • (0 reviews)
      # sp11953
      Replacement Pushrod by Melling®. Melling offers a broad selection of pushrods for both standard and performance engine applications.
      Right for your vehicle and lifestyleMade from high-quality materials for ultimate durability
      $1.07 - $8.39
    • (0 reviews)
      # sp11962
      Replacement Rocker Arm by Melling®. Melling lists rocker arms for both domestic and import applications.
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $2.52 - $45.32
    • (0 reviews)
      # sp11963
      Replacement Rocker Arm Kit by Melling®. New Melling rocker arms should always be part of a new valve train build. To make selection of the desired combination of rocker arms and installation hardware easier, Melling offers Rocker...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $3.75 - $193.18
    • (1 review)
      # sp11960
      Replacement Rocker Arm Shaft by Melling®. Melling offers a selection of quality rocker arm shafts.
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $21.59 - $142.55
    • (1 review)
      # sp11944
      Replacement Valve by Melling®. Precision engineering, selection of superior grade alloy materials and advanced manufacturing processes ensure that Melling intake valves meet the exacting specifications required for efficient,...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $2.88 - $65.87
    • (0 reviews)
      # sp11947
      Replacement Valve Lock by Melling®. New Melling valve keepers (valve locks) should be used to install both reclaimed and new engine valves. Melling valve keepers are manufactured with quality materials and engineered to meet or...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $0.55 - $4.09
    • (0 reviews)
      # sp11968
      Replacement Valve Spring Retainer by Melling®. Melling valve spring retainers are a critical piece of the valve spring system that provides an important part of the geometry needed to assure the best valve train performance....
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $1.31 - $7.61
    • (6 reviews)
      # sp107726
      Engine Parts by GENUINE®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas...
      OE quality parts from top original equipment and aftermarket manufacturershe finest quality at a great price
      $4.05 - $567.51
    • (0 reviews)
      # sp15591
      Exhaust Valve by Genuine®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $8.40 - $94.02
    • (0 reviews)
      # sp15592
      Intake Valve by Genuine®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $7.89 - $90.97
    • (1 review)
      # sp13278
      Exhaust Valve by DNJ Engine Components®. Save your time and hassle when replacing your worn out or cracked valve with this superior part expertly crafted by DNJ. Designed to meet or exceed the highest OE standards, the top-notch...
      Designed to replace your worn out or cracked valveLooks, fits and performs just like your OE part
      $3.57 - $24.98
    • (0 reviews)
      # sp13295
      Intake Valve by DNJ Engine Components®. Save your time and hassle when replacing your worn out or cracked valve with this superior part expertly crafted by DNJ. Designed to meet or exceed the highest OE standards, the top-notch...
      Designed to replace your worn out or cracked valveLooks, fits and performs just like your OE part
      $2.98 - $9.35
    • (0 reviews)
      # sp27741
      Valve Stem Oil Seal by Beck Arnley®. For one hundred years, Beck/Arnley has been providing premium OE quality parts for vehicles. Beginning with motorcycle parts in 1914 and transitioning to import vehicles in the 1950’s, brand...
      OE quality products from top original equipmentTop quality materials
      $1.28 - $5.98
    • (0 reviews)
      # sp9560
      Exhaust Valve by Mopar®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $21.35 - $23.11
    • (0 reviews)
      # sp21461
      Exhaust Valve by Sealed Power®. Designed utilizing the latest technology, this product by Sealed Power features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured to...
      Direct replacementManufactured to strict engineering quality standards
      $5.95 - $63.67
    • (0 reviews)
      # sp21463
      Intake Valve by Sealed Power®. Designed utilizing the latest technology, this product by Sealed Power features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured to...
      Direct replacementManufactured to strict engineering quality standards
      $4.46 - $32.45
    • (0 reviews)
      # sp16052
      Exhaust Valve by Crown®. Crown Automotive is just the ticket if you want to get the most out of your vehicle as well as revel in a more exciting driving experience. You will surely get a real bang for the buck!
      Developed to improve your driving experienceConstructed to ensure ultimate operation
      $8.37 - $26.65
    • (0 reviews)
      # sp16053
      Engine Intake Valve by Crown®. Crown Automotive is just the ticket if you want to get the most out of your vehicle as well as revel in a more exciting driving experience. You will surely get a real bang for the buck!
      Developed to improve your driving experienceConstructed to ensure ultimate operation
      $6.41 - $27.88
    • (0 reviews)
      # sp16457
      Engine Rocker Arm by Crown®. Crown Automotive is just the ticket if you want to get the most out of your vehicle as well as revel in a more exciting driving experience. You will surely get a real bang for the buck!
      Developed to improve your driving experienceConstructed to ensure ultimate operation
      $5.32 - $35.54
    • (0 reviews)
      # sp16459
      Engine Rocker Arm Kit by Crown®. Crown Automotive is just the ticket if you want to get the most out of your vehicle as well as revel in a more exciting driving experience. You will surely get a real bang for the buck!
      Developed to improve your driving experienceConstructed to ensure ultimate operation
      $60.33 - $79.96
    • (0 reviews)
      # sp96895
      Exhaust Valve by Omix-ADA®. The engine is the heart of your Jeep, but with many years and miles it may not be beating as strong as it once did. If you're hearing strange noises from under the hood, power is not what it used to be,...
      Performs according to OEM specificationsMeets or exceeds OEM quality standards
      $3.02 - $19.81
    • (0 reviews)
      # sp96899
      Intake Valve by Omix-ADA®.
      $1.22 - $21.70
    • (0 reviews)
      # sp9414
      Engine Exhaust Valve by Auto 7®. Over the lifespan of your vehicle your engine's parts can become worn and in need of replacement. This can cause serious problems including power and fuel economy loss. Auto 7 has the quality parts...
      Original equipment quality parts for Hyundai, KIA and GM Daewoo vehicles without the original equipment priceAll parts made where the vehicles are made, South Korea
      $3.71 - $18.63
    • (0 reviews)
      # sp9415
      Engine Intake Valve by Auto 7®. Over the lifespan of your vehicle your engine's parts can become worn and in need of replacement. This can cause serious problems including power and fuel economy loss. Auto 7 has the quality parts...
      Original equipment quality parts for Hyundai, KIA and GM Daewoo vehicles without the original equipment priceAll parts made where the vehicles are made, South Korea
      $2.18 - $14.38
    • (1 review)
      # sp34412
      Exhaust Valve by AE®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas running...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $6.75 - $51.95
    • (0 reviews)
      # sp34416
      Intake Valve by AE®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas running...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $3.57 - $23.54
    • (0 reviews)
      # sp34589
      Intake Valve by ALLMAKES 4X4®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $18.20
    • (0 reviews)
      # mpn2348408
      Exhaust Valve by Allmakes 4x4®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $13.81
    • (0 reviews)
      # sp34764
      Pushrod by AMO®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas running out to...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $3.93
    • (0 reviews)
      # sp94934
      Valve by Dokuro®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas running out...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $2.95 - $34.54
    • (0 reviews)
      # sp38493
      Intake Valve by Eurospare®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $14.58 - $15.52
    • (0 reviews)
      # sp38503
      Rocker Arm by Eurospare®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $9.74 - $10.74
    • (0 reviews)
      # sp38717
      Exhaust Valves by FEBI®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $32.23
    • (0 reviews)
      # sp38720
      Intake Valve by FEBI®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas running...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $9.84 - $16.07
    • (0 reviews)
      # sp38728
      Rocker Arm by FEBI®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas running...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $13.99 - $87.66
    • (0 reviews)
      # sp95777
      Engine Rocker Arm by HITACHI®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $20.34
    • (0 reviews)
      # sp40288
      Rocker Arm by INA®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas running out...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $8.79 - $23.40
    • (0 reviews)
      # mpn2574000
      Intake Valve by KS®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas running...
      $9.74
    • (0 reviews)
      # mpn2574000
      Intake Valve by KS®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas running...
      $9.74
    • (0 reviews)
      # sp1996
      Valve by Nakamura®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas running out...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $2.41 - $40.18
    • (0 reviews)
      # sp43310
      Exhaust Valve by Original Equipment®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $20.63 - $89.72
    • (0 reviews)
      # sp43313
      Intake Valve by Original Equipment®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $7.72 - $76.92
    • (0 reviews)
      # sp43357
      Rocker Arm by Original Equipment®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $81.74 - $124.53
    • (0 reviews)
      # sp5515
      Exhaust Valve by Osvat®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas...
      OE quality parts from top original equipment and aftermarket manufacturershe finest quality at a great price
      $12.63 - $20.02
    • (0 reviews)
      # sp47307
      Exhaust Valve by TRW®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas running...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $6.83 - $141.96
    • (0 reviews)
      # sp47312
      Intake Valve by TRW®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas running...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $4.66 - $124.78
    • (0 reviews)
      # sp11956
      Replacement Rocker Arm Ball by Melling®. The rocker arm ball (aka pivot and or fulcrum) is essential to dependable rocker arm performance. Damaged and / or worn rocker arm balls will increase friction and allow for erratic and...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $0.59 - $1.90
    • (0 reviews)
      # sp11961
      Replacement Rocker Arm Ball by Melling®. Melling recommends new rocker arm bolts with every engine rebuild. Old bolts are subject to metal failure, bolt stretching, and worn threads. Bolts also tend to be lost or damaged during the...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $0.86 - $1.70
    • (0 reviews)
      # sp11976
      Replacement Rocker Arm Fulcrum by Melling®. The rocker arm pivot (aka ball and or fulcrum) is essential to dependable rocker arm performance. Damaged and / or worn rocker arm pivots will increase friction; can cause misalignment...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $1.24 - $4.46
    • (0 reviews)
      # sp11957
      Replacement Rocker Arm Nut by Melling®. Melling recommends new rocker arm nuts with every engine rebuild. Old nuts are subject to metal failure, worn threads and also tend to be lost during the rebuilding process. Melling rocker...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $0.62 - $1.76
    • (0 reviews)
      # sp11958
      Replacement Rocker Arm Pivot by Melling®. The rocker arm pivot (aka ball and or fulcrum) is essential to dependable rocker arm performance. Damaged and / or worn rocker arm pivots will increase friction; can cause misalignment and...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $1.03 - $11.33
    • (0 reviews)
      # sp11955
      Replacement Rocker Arm Retainer by Melling®. Melling recommends new rocker arm retainers with every engine rebuild. Old retainers are subject to metal failure and also tend to be damaged or lost during the rebuilding process....
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $0.77
    • (0 reviews)
      # sp11980
      Replacement Rocker Arm Screw by Melling®. Melling recommends new rocker arm screws with every engine rebuild. Old screws are subject to metal failure, screw stretching, and worn threads. Scews also tend to be lost or damaged during...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $4.02 - $5.18
    • (0 reviews)
      # sp11954
      Replacement Rocker Arm Stud by Melling®. Melling recommends new rocker arm studs with every engine rebuild. Old studs are subject to metal failure, stud stretching, and worn threads. Studs also tend to be lost or damaged during the...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $1.26 - $3.24
    • (1 review)
      # sp15582
      Camshaft Follower by Genuine®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $8.51 - $165.96
    • (0 reviews)
      # mpn150645
      Camshaft Follower Kit by Genuine®. With 20 Lifters. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $219.87
    • (1 review)
      # sp25978
      Rocker Arm by Genuine®. Is your vehicle feeling down on power? Do you see dark puddles on the ground when you park? Is your CHECK ENGINE light on? Your engine may be in need of repair, but before you waste your time and gas running...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $6.59 - $425.74
    • (0 reviews)
      # sp4512
      Engine Valve Stem Seal Set by Fel-Pro®. If you are looking for quality sealing solutions, Fel-Pro offers you various replacement products from seals and bolts to O-Rings and dowel pins. Engineered using the latest technologies and...
      Direct OEM replacement for a proper fitEnsures reliable sealing performance
      $3.70 - $97.21




    Valvetrains differ according to camshaft location. On Over Head Valve engines the cam is in the cylinder block. On Over Head Cam engines one or two cams are on the cylinder head. On OHV engines lifters ride on the camshaft lobes, pushrods transfer motion up to the cylinder head, and rocker arms pivot on shafts or studs actuating the valves. OHC valvetrains may have pivoting rocker type followers and lash adjusters or buckets between the cam and valves.

    Valvetrain problems are often caused by excessive clearance. As cam lobes, lifters/followers, pushrods, and rocker arms wear, clearance is increased. Once clearance starts to increase, the pounding experienced by each component becomes greater as the lash opens and is taken up during valve operation. This can result in bent pushrods and broken rocker arms. Clicking noise in the valvetrain area can indicate excessive clearance, which can often be confirmed with a visual inspection. Check pushrods for a bent condition by rolling them on a flat surface. Inspect rocker arms for wear at the pivot and valve contact areas.

    The most common valve failure is overheating, especially on exhaust valves, which causes the valve to “burn” and distort and/or crack. The exhaust valve is exposed to extreme temperatures, and the valve must be able to seat fully to transfer this heat to the cylinder head. Carbon buildup, incorrect valve adjustment, or any other factor that keeps the valve from seating will prevent heat transfer. A burnt valve will not be able to seal the combustion chamber, causing reduced compression and power from that cylinder. Some performance engines have sodium filled exhaust valves to help reduce their temperature.

    Miles and engine heat can also take their toll on valve springs. The valve springs must have enough pressure to keep the valves closed and maintain valve lash. Seat pressure is usually 70-90 lbs. on a stock engine with open pressure at 200 lbs. or more. Weak valve springs can’t exert the proper amount of pressure, which can cause misfire and loss of power as engine speed increases, resulting in “valve float”, where the valves fail to close. In extreme cases valve float can allow the valves to contact the pistons on some engines, bending or breaking the valves and cracking or breaking the pistons.

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    Valves & Valvetrain Parts Reviews

    Average rating:  4.5  4.5 - 18 reviews
    5 of 5
    Nicely Made Kit
    Nicely made shafts and rocker arms. Easy to install and fit well. Broke several retainers good idea to have backup supply.
    DPosted by Dorian (Caldwell, ID) / April 30, 2017
    1970 Buick Electra
    Was this review helpful for you? Yes
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