Complex sentence: This noise is said to come from the cams due to incorrect valve setup (when setting valve clearance each cylinder must be set to TDC) or from age and use of incorrect oil grade the correct oil grade is 5w-30 semi synthetic oil.
Split into simpler sentences: This noise is said to come from the cams due to incorrect valve setup (when setting valve clearance each cylinder must be set to TDC) or from age and use of incorrect oil grade. The correct oil grade is 5w-30 semi synthetic oil.