MDE Unit 3 Chain and Belt driven camshaft timing, tappets

With reference to a diesel engine chain driven camshaft:
(a) state the important checks that must be made during the drive inspection;(6)
(b) explain why the checks described in part (a) are necessary.(4)

Study Notes MDE Unit 3 Q1 Quiz

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With reference to engine timing belts or chains:
(a) state the cause of loss of timing drive tension;(2)
(b) state how this will affect the engine;(6)
(c) explain how slight loss of tension can be corrected.(2)

Study Notes MDE Unit 3 Q2 Quiz

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Study Notes MDE Unit 3 Q3 Quiz

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(a) Sketch a four stroke timing diagram, showing the position of fuel valve, exhaust valve and inlet valve operation.(8)
(b) Explain the meaning of the term valve overlap, stating its purpose.(2)

Study Notes MDE Unit 3 Q4 Quiz

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(a) Describe the procedure for setting tappet clearance on diesel engine inlet/exhaust valves.(6)
(b) Explain the importance of tappet clearances.(4)

Study Notes MDE Unit 3 Q5 Quiz

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Study Notes MDE Unit 3 Q6 Quiz

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MDE End of Unit Quiz