Valve Spring Free Length and Preload
WARNING: This page is about a different car, the 2010 Suzuki Kizashi. However, it is still accessible from the selected car via links, so may be relevant.
- Check each valve spring for breakage or weakening.
- Measure valve spring free length and preload.
Replace valve spring if measured value is less than limit.
NOTE: Weakened valve springs can cause chatter, not to mention possibility of reducing power output due to gas leakage caused by decreased seating pressure.
Valve spring free length "a"
Standard: 51.34 mm (2.021 in.)
Limit: 50.34 mm (1.981 in.)
Valve spring preload when compressed to 41.0 mm (1.61 in.)
Standard: 170 - 196 N (17.4 kgf - 19.9 kgf, 125.5 lbf - 144.0 lbf)
Limit: 165 N (16.9 kgf, 37.1 lbf)
Valve spring preload when compressed to 31.2 mm (1.22 in.)
Standard: 379 - 437 N (38.7 - 44.5 kgf, 279.5 - 322.0 lbf)
Limit: 375 N (38.2 kgf, 277.0 lbf)