Valve adjustment
B18 / B20
The valve clearance should be 0.40mm for hot engine.
This applies to both tuned and Std engines.
1: When the valves stand and "weigh" (overlap), on first cylinder, set clearance on the fourth cyl valves.
2: When the fourth cyl valves "weigh" you set cyl 1 valves.
3: When cyl two valves "weigh", set the third cyl valves.
4: And finally when the third valve "weigh" set the second cyl valves.