chapter 13 (engine top end construction)

1234567891011121314151617181920212223242526272829
Across
  1. 3. A valve rotator turns the valve to prevent ____ buildup and hot spots on the valve face.
  2. 4. The rocker arm assembly is tightened to a specific ____. (measure of force)
  3. 8. Camshaft ___ is found by subtracting the cam base diameter from the height of the cam lobe.
  4. 9. A bare cylinder head is commonly made of cast iron or ____.
  5. 15. The nylon ____ is a cross between a conventional oil seal and a valve spring shield. It seals against the valve stem like a seal and encircles the upper spring like a shield.
  6. 16. The ____ angle reduces the contact area between the seat and valve. It is a 1 /2°—1° difference between the valve seat face angle and the angle of the valve face.
  7. 18. A valve stem cap serves as a ___ that reduces friction; helping to prevent stem and rocker arm wear.
  8. 19. Stellite valves are used in engines designed to burn ____ fuel.
  9. 21. Normal valve face angles are 45 degrees and ___ degrees.
  10. 22. Some push rods have a ___ on each end.
  11. 23. A ____ plate is used to limit camshaft end play.
  12. 24. An ____ valve guide is a hole machined through the cylinder head.
  13. 26. Rather than cast-iron, some high-performance or sports car engines use lightweight, free-flowing ___ tubing exhaust manifolds called headers.
  14. 27. Valve ____ is used to help draw burned gasses out of the cylinder and adds air-fuel mixture flow, increasing engine power.
  15. 28. Some cam housings are designed with a cam cover, with the purpose of reducing the transmission of ____.
  16. 29. Valve spring ___(s) provide a means of restoring full spring tension and pressure without spring replacement.
Down
  1. 1. A camshaft can be driven by ____(s), a belt, or a chain.
  2. 2. Valve ___ occurs when the valve fails to close entirely at high rpms because the spring is too weak. Therefore, spring specifications are important.
  3. 3. Some engine valves are plated with this type of metal to better resist wear.
  4. 5. This valve is shaped like a mushroom, and it “pops” open.
  5. 6. One common method of creating variable valve ____ is: using electro-hydraulically operated rocker arms and two different camshaft profiles for each valve.
  6. 7. This type of valve seal can be made of neoprene rubber or plastic and is shaped like a cup.
  7. 10. ____ cups are precisely machined holes into the cylinder head deck surface.
  8. 11. A rocker arm is a type of ____ lever.
  9. 12. A flame ___ prevents the flame of an engine backfire from entering the air filter housing.
  10. 13. Of the 4 types of valve lifters, this type does not contain oil, and requires periodic adjustment.
  11. 14. An intake manifold holds the ____ body and has passages, called runners, going to each cylinder head port.
  12. 15. Which element (from the periodic table) is used in some valves when extra cooling is needed?
  13. 16. A variable ___ system is like having two intake manifolds in one: one is for low-speed torque and another for high-speed power.
  14. 17. This part of the camshaft (two words, no spaces) controls: when each valve opens in relation to piston position, how long each valve stays open, and how far each valve opens.
  15. 20. A valve spring seat is a cup-shaped ____ installed between the cylinder head and the bottom of the valve spring.
  16. 25. Intake manifolds constructed of plastic allows additional parts such as sensors and ____ fittings, to be bolted to the plastic part without thread damage.