Question

With reference to timing chains:

State the cause of chain elongation in service, using a sketch of a section of a camshaft roller chain to illustrate your answer;

State: i. The effects of increased chain length:

ii. The method of assessing percentage increase in length:

Explain how the effects of elongation are corrected:

State why a limit is placed on percentage chain elongation and give typical example.

2010/SR09 2015/SR11 2018/OCT