31. The intake valve closes, sealing the chamber. 32. During the intake stroke, fresh air is inducted into the cylinder through a mechanically operated intake valve . 33. The connecting rod valve lifters which, in turn, open and close the intake valves and exhaust valves. 34. If the deposits have formed on the intake valves , they may be removed via walnut shell blasting. 35. In 1908 Thor achieved automatic intake valves on their engine and offered many typical options for the day. 36. Hyder was fined $ 100, 000 for his involvement with lining fuel tanks and intake valves with Sterno. 37. The 360 used the large intake port 340 heads with a smaller intake valve ( 1.88 inch ). 38. Shell claims its formula keeps intake valves clean while an unnamed " convenience store gas " damages them. 39. Honda also made the intake ports shorter and utilised intake valves that were 2 mm larger in diameter. 40. They are filled with water through an intake valve ( at the highest end of the construction ).