SOHC (Single Overhead Camshaft)
SOHC means a single camshaft in the cylinder head operates both the intake and exhaust valves, often through rocker arms.
What is SOHC (Single Overhead Camshaft)?
It is a simpler and cheaper design than DOHC. It was common on older engines and is still used on some small engines. Two or three valves per cylinder are typical, though four-valve SOHC heads also exist.
How it works
One camshaft driven by a belt or chain opens all valves, using rocker arms to reach valves on the other side.
Why it matters for your car
Worn rocker arms or shafts can cause ticking noises. Valve clearance may need periodic adjustment on engines without hydraulic lifters.
Other terms
- All-wheel Drive (AWD)
- Automated Manual Transmission (AMT)
- Battery Charger (Smart Charger)
- Child Seat Fitting
- Crankshaft
- Door Card (Door Panel)
- Exhaust System
- Forward Collision Warning
- Front Wing (Fender)
- Heat Pump
- Low-Profile Tyre
- No-Claims Bonus (No-Claims Discount)
- Open Loop (Engine Control Mode)
- Thermostat Housing
- Trafficators (Semaphore Indicators)
- Transponder Key
- Trolley Jack (Floor Jack)
- Tyre Repair Kit (Sealant Kit)
- Universal Joint (U-joint)
- Wheelspin