* Cam Bearings: These are individual cylindrical bearings pressed into the engine block. The camshaft's lobes ride on these bearings, providing support and reducing friction.
* Front and Rear Cam Bearings: These are typically larger diameter bearings located at the front and rear ends of the camshaft. They provide additional support and prevent axial movement (movement along the length of the cam). Sometimes these are thrust washers rather than full bearings.
While the cam bearings are the primary means of holding the cam in place, they work in conjunction with the timing chain (or belt, in less common applications) which keeps the camshaft in rotational position relative to the crankshaft. The chain/belt is tightened via a tensioner. The cam is *not* directly held in place by the chain/belt. The chain/belt only governs the *timing* relative to the crank, not positional holding in the block.
