ENGINE VALVE ADJUSTMENT

1. What is the primary purpose of valve adjustment?

• To increase fuel efficiency

• To adjust the timing of the ignition system

• To ensure proper clearance between the valve and rocker arm

• To adjust the fuel/air mixture

1. Which of the following tools is essential for measuring valve clearance?

• 1. Torque wrench

• Feeler gauge

• Compression gauge

• Dial indicator

When performing a valve adjustment, what position should the engine be in?

• At top dead center (TDC) of the compression stroke for each cylinder

• At bottom dead center (BDC) of the exhaust stroke

• At full throttle

• At the halfway point between TDC and BDC

1. What symptom can indicate that a valve adjustment is needed?

• Decreased fuel consumption

• A ticking noise from the valve cover area

• The engine cranks too slowly

• A whining noise from the timing belt

1. What could happen if the valve clearance is set too tight?

• Increased fuel economy

• Valve might not fully close, leading to burnt valves

• Reduced engine temperature

• Increased engine power

1. Which component typically needs adjustment when performing a valve clearance check?

• Rocker arm

• Piston

• Spark plug

• Camshaft sensor

1. How often should a valve adjustment generally be performed on a four-cylinder engine?

• Every 10,000 miles

• Every 30,000 miles or per manufacturer’s recommendations

• Only when you notice poor performance

• Every 5,000 miles

1. What type of engine is typically adjusted with tappet screws?

• Overhead cam engines

• Pushrod engines

• Direct injection engines

• Turbocharged engines

1. Which type of camshaft arrangement might require a shim adjustment rather than a tappet screw?

• Overhead valve (OHV) engines

• Overhead cam (OHC) engines

• Dual overhead cam (DOHC) engines

• Flathead engines

1. What happens if valve clearance is too loose?

• The engine will overheat

• There will be reduced compression and power loss

• The valves will close too quickly

• The engine will stall