The camshaft carrier is the casing which houses the camshaft, along with the camshaft followers or tappet blocks. Located in the engine, positioned over the poppet valves in the cylinder head, the camshaft carrier offers secure, protective housing to the camshaft.
The camshaft plays a big part in how well the engine performs. It is usually either a steel or cast iron cylindrical structure in the form of a rod which runs along the cylinders. The camshaft's job is to manage the poppet valves, opening and closing the intake and exhaust valves in the cylinder head. The cylinder head is comprised of a series of passages that carry the air and fuel combination needed for combustion to the cylinders; the liquid coolant, needed to keep the engine cool; and harmful fumes (produced by the engine in the process of combustion) from the exhaust valves to the exhaust manifold and away from the vehicle. An integral part of the engine's timing system, the camshaft works to manage this process by making sure that the intake and exhaust valves are opening and closing at exactly the right time. The engine needs the correct amount of air and fuel flowing through it in order for the fuel to burn in the cylinders and for the engine to ignite or spark at the right time. The outer surface of the camshaft has protruding curves or lobes around it (one for each of the valves) which engage with, essentially lifting, the valves as the camshaft turns, opening and closing the intake and exhaust valves.
The camshaft pulley controls how fast the camshaft rotates and enables the smooth rotation of the cylindrical camshaft. The camshaft receives power from the crankshaft, connected by the cam belt/timing belt, and as the camshaft rotates on the camshaft pulley, it opens and closes the valves. The camshaft pulley works in conjunction with the timing belt to make sure the camshaft is rotating in sync with the crankshaft (the part that controls the engine's pistons and turns power from the pistons into the rotational power required to make the car move).
The camshaft carrier should keep the camshaft housed securely in position and in perfect alignment, enabling it to do its job. Cracked, badly rusted and worn camshaft carriers should be replaced as soon as possible. When replacing this part, the camshaft carrier is the ideal choice, specifically designed for the make and model of your vehicle it guarantees perfect compatibility.