The camshaft, or cam for short, opens and closes the intake and exhaust valves, allowing the fresh air/fuel mixture to enter the cylinder for combustion, and the spent gases to flow out. Most production cams are iron castings that are supported on journals that rotate in bearings, with individual eccentric lobes to actuate each valve. A single cam can be located in the cylinder block, or one or two cams can be mounted on the cylinder head.

Featured Products

  • Melling® Mechanical Lifters Camshafts
    (0 reviews)
    # sp11978
    Camshafts Using Mechanical Lifters by Melling®. Melling offers a full line of camshafts for domestic cars & light trucks, import vehicles, marine and high performance engines.
    $109.05 - $258.75
  • AE® Camshafts
    (1 reviews)
    # sp1997
    Camshafts 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 out...
    $2.60 - $256.04
  • Melling® Replacement Camshaft
    (0 reviews)
    # sp11942
    Replacement Camshaft by Melling®. Melling offers a full line of camshafts for domestic cars & light trucks, import vehicles, marine and high performance engines.
    $74.33 - $500.90
  • Crown® Camshaft
    (0 reviews)
    # sp9422
    Camshaft 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!
    $1.30 - $133.26
  • EUROSPARE® Camshafts
    (1 reviews)
    # sp2000
    Camshafts 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...
    $1.00 - $754.35
  • INA® Camshafts
    (0 reviews)
    # sp1998
    Camshafts 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...
    $12.98 - $229.61
  • Auto 7® Engine Camshaft Position Sensor
    (0 reviews)
    # sp4981
    Engine Camshaft Position Sensor 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...
    $27.43 - $128.75
  • Dorman® Engine Camshaft Synchronizer
    (0 reviews)
    # sp4188
    More like a kit than a single part, many of Dorman’s Engine Camshaft Synchronizers include a new camshaft position sensor in addition to the synchronizer. Installation is convenient-and performance is trouble-free. The rigorous...
    $31.28 - $197.52
  • Spectra Premium® Engine Camshaft Synchronizer
    (0 reviews)
    # sp8331
    Engine Camshaft Synchronizer by Spectra Premium®. Spectra Premium Cam Shaft Synchronizers feature in-house proven technology that provides increased accuracy by providing a stronger, more consistent signal and performance.
    $15.33 - $214.08
  • Dorman® Camshaft Position Sensor
    (0 reviews)
    # sp4121
    Camshaft Position Sensor by Dorman®. Engine Camshaft Position Sensors are used by the engine control module to synchronize the pulsing of sequential fuel injectors so they match the firing order of the engine. Dorman’s Engine...
    $12.47 - $92.88
  • Hitachi® Engine Camshaft Position Sensor
    (0 reviews)
    # sp5071
    Engine Camshaft Position Sensor by Hitachi®. By determining camshaft position, this sensor allows the computer to maintain effective fuel injection timing and ignition timing control for optimal engine performance. It is built to...
    $47.28
  • Omix-Ada® Camshaft Position Sensor
    (0 reviews)
    # sp1364
    Camshaft Position Sensor by Omix-Ada®. The Camshaft Position Sensor indicates when the No. 1 cylinder is at TDC compression. The engine control computer uses this information to establish fuel injection sequence and ignition firing...
    $2.33 - $161.58
  • Mitsubishi Electric Automotive® Camshaft Position Sensor
    (0 reviews)
    # sp5500
    Camshaft Position Sensor by Mitsubishi Electric Automotive®. 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...
    $41.46 - $696.38
  • Spectra Premium® Engine Camshaft Position Sensor
    (0 reviews)
    # sp8330
    Engine Camshaft Position Sensor by Spectra Premium®. Spectra Premium Camshaft Position Sensors are designed and produced under a strict TS16949 quality control process.
    $17.48 - $208.55
  • Bosch® Camshaft Position Sensor
    (1 reviews)
    # sp5742
    Camshaft Position Sensor by Bosch®. A faulty camshaft sensor will report faulty position readings to the ECU, affecting your engine's operation or resulting in poor fuel mileage. Replace your faulty camshaft position sensor with a...
    $15.88 - $199.15
  • ACDelco® Professional™ Engine Camshaft Position Sensor
    (0 reviews)
    # sp11840
    Professional™ Engine Camshaft Position Sensor by ACDelco®. Designed utilizing the latest technology, this Camshaft Position Sensor by ACDelco features premium quality and will perform better than advertised. Perfect for your...
    $8.91 - $159.76
  • Delphi® Engine Camshaft Position Sensor
    (0 reviews)
    # sp5759
    Engine Camshaft Position Sensor by Delphi®. Delphi sensors use the Hall Effect or magneto resistive (MR) principles for accurate and clean signal input to the electronic control module (ECM). The result is more design flexibility...
    $20.31 - $86.93
  • National® Engine Camshaft Repair Sleeve
    (0 reviews)
    # sp4818
    Engine Camshaft Repair Sleeve by National®. This part is manufactured by one of the most trusted names in the automotive industry to keep your vehicle perform optimally. It is built to the original equipment specifications to...
    $21.73 - $32.76
  • National® Engine Camshaft Seal
    (0 reviews)
    # sp4817
    Engine Camshaft Seal by National®. Don’t just repair a leak, prevent future problems with a National Oil Seal. This part is manufactured using exclusive National Dynamic Edge technology that generates a dynamic pumping action to...
    $4.31 - $19.02
  • Timken® Engine Camshaft Repair Sleeve
    (0 reviews)
    # sp5026
    Engine Camshaft Repair Sleeve by Timken®. Repair sleeves restore the sealing surface on yokes and shafts, avoiding expensive components replacement. This hard, wear-resistant, and ultra low friction sleeve is precision manufactured...
    $21.51 - $25.98
  • ACDelco® GM Original Equipment™ Engine Camshaft Components
    (0 reviews)
    # sp11738
    GM Original Equipment™ Engine Camshaft Components by ACDelco®. Designed utilizing the latest technology, this GM Original Equipment Engine Camshaft Components by ACDelco features premium quality and will perform better than...
    $18.76 - $43.59
  • URO Parts® Engine Camshaft Oiler Kit
    (0 reviews)
    # sp12889
    Camshaft Oiler Kit by URO Parts®. Replace your worn out engine part with this superior engine component designed by URO to restore your vehicle's factory performance. Manufactured to meet the highest OE standards, this reliable...
    $3.72
  • Timken® Engine Camshaft Seal
    (0 reviews)
    # sp5025
    Engine Camshaft Seal by Timken®. Timken offers the right seal to keep your vehicle running optimally. Timken seals provide ultimate protection from contaminants and help retain lubricants and liquids, ensuring reliable vehicle...
    $3.42 - $21.51
  • Cloyes® Camshaft Thrust Button
    (0 reviews)
    # sp5245
    Camshaft Thrust Button by Cloyes®. Keep your engine’s valvetrain in perfect time with Cloyes, the world leader in timing drive systems. No matter whether you need a timing gear or complete timing gear set, Cloyes has the OE...
    $8.78 - $27.86
  • Continental® ContiTech™ Camshaft Seal
    (0 reviews)
    # sp5386
    ContiTech™ Camshaft Seal by Continental®. Designed as an OEM quality replacement for your worn-out or leaking camshaft seal, this product provides a precise fit, reliable and long-lasting performance. Made of premium quality...
    $2.06 - $24.61
  • AJUSA® Camshaft Plug
    (0 reviews)
    # sp5344
    Camshaft Plug by AJUSA®. If you are looking for quality sealing solutions, Ajusa offers you various replacement products from seals and bolts to O-Rings and dowel pins. Engineered using the latest technologies and global...
    $2.96 - $4.02
  • Fel-Pro® Engine Camshaft Plug Set
    (0 reviews)
    # sp4478
    Engine Camshaft Plug 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...
    $4.02 - $16.21
  • Fel-Pro® Engine Camshaft Seal
    (0 reviews)
    # sp4480
    Engine Camshaft Seal 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 global...
    $4.00 - $32.17
  • ACDelco® GM Original Equipment™ Camshaft Position Actuator Magnet Gasket
    (0 reviews)
    # sp11719
    GM Original Equipment™ Camshaft Position Actuator Magnet Gasket by ACDelco®. Designed utilizing the latest technology, this GM Original Equipment Camshaft Position Actuator Magnet Gasket by ACDelco features premium quality and...
    $10.50
  • Victor Reinz® Camshaft O-Ring
    (0 reviews)
    # sp5675
    Camshaft O-Ring by Victor Reinz®. When you’re low on oil, coolant or some other fluid, you may be tempted to just run down to the local auto parts chain store. But before you waste your time and gas only to find high prices and...
    $1.03
  • Victor Reinz® Camshaft Plug
    (0 reviews)
    # sp5674
    Camshaft Plug by Victor Reinz®. When you’re low on oil, coolant or some other fluid, you may be tempted to just run down to the local auto parts chain store. But before you waste your time and gas only to find high prices and...
    $3.47 - $8.20
  • Victor Reinz® Camshaft Seal
    (0 reviews)
    # sp5673
    Camshaft Seal by Victor Reinz®. When you’re low on oil, coolant or some other fluid, you may be tempted to just run down to the local auto parts chain store. But before you waste your time and gas only to find high prices and...
    $3.68 - $32.28
  • ACDelco® GM Original Equipment™ Driver Side Camshaft Cover Seal
    (0 reviews)
    # sp11734
    GM Original Equipment™ Driver Side Camshaft Cover Seal by ACDelco®. Designed utilizing the latest technology, this GM Original Equipment Driver Side Camshaft Cover Seal by ACDelco features premium quality and will perform better...
    $21.11
  • Victor Reinz® Camshaft Gasket
    (0 reviews)
    # sp5676
    Camshaft Gasket by Victor Reinz®. When you’re low on oil, coolant or some other fluid, you may be tempted to just run down to the local auto parts chain store. But before you waste your time and gas only to find high prices and...
    $4.10 - $17.95
  • Cloyes® Timing Camshaft Gear Bolt
    (0 reviews)
    # sp5237
    Timing Camshaft Gear Bolt by Cloyes®. Keep your engine’s valvetrain in perfect time with Cloyes, the world leader in timing drive systems. No matter whether you need a timing gear or complete timing gear set, Cloyes has the OE...
    $8.33 - $8.82
  • Fel-Pro® Engine Camshaft Position Sensor O-ring
    (0 reviews)
    # sp4479
    Engine Camshaft Position Sensor O-ring 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...
    $4.46 - $6.64
  • Dorman® Camshaft Plug
    (0 reviews)
    # sp6846
    Camshaft Plug by Dorman®. Dorman’s Engine Camshaft Plugs are available in multiple styles, including Cup Type, Pilot Seal™, Reverse Taper, Concave, Quick-Seal® Rubber and Quick-Seal ® Copper. Our uniquely designed Pilot Seal...
    $1.43 - $16.73
  • ACDelco® Professional™ Camshaft Position Solenoid Connector
    (0 reviews)
    # sp11838
    Professional™ Camshaft Position Solenoid Connector by ACDelco®. Designed utilizing the latest technology, this Professional Camshaft Position Solenoid Connector by ACDelco features premium quality and will perform better than...
    $16.12
  • Victor Reinz® Camshaft Sensor O-ring
    (0 reviews)
    # sp5672
    Camshaft Sensor O-ring by Victor Reinz®. When you’re low on oil, coolant or some other fluid, you may be tempted to just run down to the local auto parts chain store. But before you waste your time and gas only to find high...
    $2.87


Featured Brands

On Over Head Valve (OHV) engines, the block mounted cam actuates the valves via lifters that ride on the lobes, pushrods that transfer motion up to the cylinder head, and rocker arms that pivot on shafts or studs. Single Over Head Cam (SOHC) engines operate the valves using followers or pivoting rocker arms, while Double Over Head Cam (DOHC) engines, which have separate cams for the intake and exhaust valves, employ buckets between the cam and valves.

The crankshaft drives the cam(s) using a timing chain and gears or timing belt and sprockets, at ½ crankshaft speed. The camshaft must be timed with the crankshaft so that valve opening and closing is perfectly synchronized with piston movement. On performance engines, valve timing can be fine-tuned by advancing or retarding the cam, to achieve desired power characteristics. Along with timing, valve lift and duration are also great engine power production factors and these too are determined by the cam’s lobe profile.

Duration is the length of time that the valve is open. Duration is increased on performance camshafts to increase flow for more high rpm power. Lift is the distance the valve is raised from its seat. On vehicles with rocker arms the lobe lift can be increased by the rocker arm ratio, so there is a lobe lift and a valve lift specification. Lobe profile can also differ between solid lifter and hydraulic lifter camshafts. The former require a certain amount of clearance, or lash, during operation and require periodic adjustment. Hydraulic lifters have a plunger and spring inside an oil-filled cavity to compensate for expansion.

Lifters can be further segregated according to whether they are flat tappets or rollers. Flat tappet cam lobes are ground with a taper to allow the lifter to rotate, otherwise the lobe and bottom of the lifter would quickly wear. Because the wear pattern is unique to each lobe, if components are reused they must be reinstalled in the same position. Flat tappet cams should always be installed with new lifters. The significantly reduced friction enables roller lifter cams to be much more durable than flat tappet designs, and as long as the roller wheels and bearings are in good shape, roller lifters can be reused.

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    This article will guide you through a generic tune up on most any car or light duty gasoline-powered vehicle built within the last 20 years or so. We will presume that you are tuning up your engine because it has reached the mileage or time point to do so, and that you are NOT performing a tune up to cure an engine performance defect. We make this distinction because not all running/performance issues will be solved via a simple tune up.
  • Auto Repair Parts
    Does your ride have timing gears, a timing belt, or a timing chain? Is one better than the other? And perhaps most importantly, do I need to be concerned about the recommendation to replace the timing belt at a certain mileage interval? Welcome to our discussion of "engine timing".
  • Auto Repair Parts
    Internal combustion engines are extremely complex and feature a wide array of components that rotate, move up and down, pump, seal, or remain stationary. When repairing or rebuilding your engine, you will come across many different terms when referencing repair manuals and ordering parts. We know it can be confusing, especially when the repair is complex. Even if you are paying a professional to do the work, it’s good to be conversant with the topic. In order to help you understand the terminology of engine components, we’ve created the following glossary, listed in alphabetical order.

Camshafts Reviews

Average rating:  4.5  4.6 - 11 reviews
Read All Camshafts Reviews
5 of 5
Great Cam
I did not expect this cam will change anything much, but I noticed my car runs better even after a cold start. Good quality cam with low price CARiD service was great, no hiccups on delivery.
JPosted by Jerry (Pembroke Pines, FL) /
1973 Chevy Chevelle
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