Isuzu 4BG1 Instruction Manual page 95

31. Engine starting
condition and noise
condition
Check engine stability and noise.
32. Exhaust smoke
condition
Check exhaust smoke color.
33. Cylinder compression Check every 1200 hours.
pressure
34. Valve clearance check Incorrect valve clearance will result in increased engine noise and lower engine
output. Thereby adversely affecting engine performance.
Check and adjust every 1200 hours.
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