Timing Belts

Question 1

Review the Diagram for labeled components and timing belt orientation

Can be found on LH: Midterm Exam prep -> “Timing Belts” page 1

Answer 1

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Question 2

What are some of the components the timing belt interacts with? (

Answer 2

Camshaft gear
Crankshaft gear
Water pump
Idler pulley
Timing belt tensioner

Question 3

Do all vehicles have a timing belt? Why or why not?

Answer 3

No, many do though some will use a chain or sprocket system (like a bike) while others may use gears.

Question 4

Do timing belts last forever?

Answer 4

No - common replacement intervals are 90,000km and 140,000km.

Question 5

What is the difference between and interference and non-interference engine design?

Answer 5

Interference engines: If the camshaft and crankshaft are of time, the pistons can collide with one or more valves. A broken timing belt can even damaged pistons or crack cylinder heads.

Non-interference engines: will have space between the valves and the pistons in any position of the crank - making collision impossible.