Where is the Camshaft Located In a Car?

Reviewed by

Richard McCuistian, ASE Certified Master Automobile Technician

Technical Reviewer at CarParts.com

Written by CarParts.com Research Team - Updated on December 2nd, 2025

Reading Time: 2 minutes

Summary

  • The camshaft is usually located in the engine’s cylinder head, while cam-in-block engines place it inside the engine block. It becomes visible on overhead cam engines once the valve cover is removed.

  • The camshaft rotates in sync with the crankshaft. Its lobes open the intake and exhaust valves, making it a key part of the valvetrain that controls gas flow in and out of the combustion chamber.

  • Accessing the camshaft requires removing the valve cover on overhead cam engines. Cam-in-block engines require additional steps, and proper gasket installation is essential to avoid oil leaks.

On most vehicles, the camshaft’s location will be in the engine’s cylinder head or the top part of the engine that contains the engine’s valvetrain. On overhead camshaft engines, the camshaft is typically visible as soon as you remove the engine’s valve cover, which is the cover for the engine’s valvetrain. 

That said, cam-in block engines will have the camshaft somewhere inside the engine block. An engine can have one or two camshafts, depending on whether an engine is a single overhead or dual overhead cam. 

Overhead camshaft positioned in the engine’s cylinder head, operating the intake and exhaust valves directly. | Image Source: Richard McCuistian
Cam-in-block engine layout with the camshaft positioned inside the engine block and driving the valvetrain through lifters and pushrods. | Image Source: Richard McCuistian

The camshaft is a rod-like component that rotates in sync with your engine’s crankshaft. When the camshaft spins, its lobes push the engine’s intake and exhaust valves open. 

The camshaft is a critical part of an engine’s valvetrain, which is the component responsible for opening and closing the cylinder valves, effectively controlling when gases enter and leave the combustion chamber. 

Tips on How to Access the Camshaft

You’ll have to open the engine’s valve cover to reach the camshaft. The engine must be cool before you attempt to access the camshaft. That’s if it’s an overhead cam engine. Cam in block engines require the removal of the rocker arms, pushrods, lifters, and front cover. 

Warning: The distributor will need to be removed (if equipped). Don’t try this if you don’t know how and you expect the engine to run again without asking for help.

Mechanic accessing an overhead camshaft after removing the valve cover to work on the valvetrain. | Image Source: Richard McCuistian

The valve cover prevents oil from leaking from the engine’s valvetrain. It is typically removed by unscrewing the bolts that keep the cover in place and disconnecting the wiring connectors located around the engine. 

Remember that valve cover gaskets must be properly reinstalled. Otherwise you risk an oil leak, which can be catastrophic. It’s common to replace valve cover gaskets every time the valve cover is opened, but they can be reused as long as you properly reinstall them. That said, the likelihood of a leak is greater if you reuse the valve cover gasket.

Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. The accuracy and timeliness of the information may change from the time of publication.

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Published by
CarParts.com Research Team and Richard McCuistian, ASE Certified Master Automobile Technician