06-15-2015, 10:37 PM
At my 12,000 km (8K mi) service, all valves were in spec. I let the dealer note down the measured values for me:
Outlet valve clearance, 0.28 mm +-0.03mm:
27 28 | 30 30 | 30 30 | 29 28
Inlet valve clearance , 0.15mm +-0.03mm:
15 17 | 14 16 | 15 15 | 16 15
Wearout of valve seating decreases clearance over time. So it's better to have more clearance than less.
Outlet valve clearance, 0.28 mm +-0.03mm:
27 28 | 30 30 | 30 30 | 29 28
Inlet valve clearance , 0.15mm +-0.03mm:
15 17 | 14 16 | 15 15 | 16 15
Wearout of valve seating decreases clearance over time. So it's better to have more clearance than less.