What is the reason for the ticking sound in the Rapid's engine?

1 Answers
DeBrady
07/29/25 5:46pm
Rapid engine has a ticking sound caused by excessive clearance between the piston and cylinder wall. Excessive clearance between the piston and cylinder wall: Excessive tightness in piston pin assembly or connecting rod bearing assembly; excessive clearance between the tappet and its guide hole; wear on the camshaft profile; sometimes, a loose starter clutch causes pulley noise (especially noticeable during speed changes). Excessive valve clearance: Excessive clearance between the tappet and its guide hole; wear on the camshaft profile; excessive clearance between the valve stem and its guide; broken valve spring; radial cracking of the camshaft timing gear; loose valve seat; valve sticking and failing to close. Excessive clearance between the piston and cylinder wall: Piston issues due to incorrect depth and width of the main bearing oil groove; poor lubrication due to low oil pressure.
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