The Acura MDX Camshaft coordinates accurate valve timing to ensure that the SUV is breathing efficiently and providing balanced power. Positioned in synchrony with the crankshaft by either a chain or belt, the Camshaft rotates at half crank speed in the four-stroke engine, raising its eccentric lobes to open the intake and exhaust valves and then allowing spring force to close them. Earlier generations of the Acura MDX were designed around a single overhead cam layout that applied one Camshaft per cylinder head and rocker arms to actuate the valves, whereas later generations of the MDX use a double overhead cam design that has two Camshafts per cylinder head and bucket followers to separately control intake and exhaust events for better smooth high rpm operation. Each Camshaft must maintain perfect alignment with the crank, or else misfires would occur. The main difference between these styles comes from the valve actuation path, with SOHC using one Camshaft for both valve sets and DOHC splitting the job, which makes the engine breathing sharper and increases performance. Both designs are beneficial to help the Acura powerplant remain durable; however, a worn Camshaft throws combustion off and can be damaging to critical Acura MDX engine parts.
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