Rio L4-1.5L (2001)
Intake 1.6107 inch (41.3 mm)
Exhaust 1.6068 inch (41.2 mm)
Valve spring
1. Inspect each valve spring for cracks and damage.
2. Measure free length and out-of-square. Replace valve springs as needed.
Free length:
Standard: 1.653 in (42.4 mm)
Limit: 1.646 inch (42.2 mm)
Out-of-square: 0.433 inch (1.11 mm)
