System Specifications
Cylinder Head and Valve TrainHead face surface finish 0.2/2.5 0.8 mm
Valve stem-to-guide clearance
Intake 0.020 - 0.069 mm
Exhaust 0.049 - 0.095 mm
Valve head diameter
Intake 41.9 - 42.1 mm
Exhaust 34.9 - 35.1 mm
Valve face runout limit intake and exhaust 0.005 mm
Valve face angle 45.5 degrees
Valve stem diameter standard
Intake 8.025 - 8.043 mm
Exhaust 8.006 - 8.017 mm
Valve springs 4.3 turns
Compression pressure
Loaded 83.0 N - 29.27 mm
Unloaded 350 N @ 39.53 mm
Free length (approximate) 52.4 mm
Installed spring height 39.53 mm
Valve springs assembled height 39.53 mm
Service limit, pressure lost @ specified height % 5 mm
Cylinder head bolts
1. Tighten all bolts in a single sequence to 50 Nm.
2. Back the bolts off 1/2 turn.
3. Tighten the bolts in sequence shown to 50 Nm.
4. Rotate all the bolts in a single sequence an additional 180 degrees in two steps of 90 degrees each.