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Description & Operation: Testing

  1. Ensure that engine and air cleaner are cold. Check position of flap valve in air cleaner snorkel. The valve should be against the cold air intake (hot air position).
  2. Start and run engine until normal operating temperature is reached. Check operation of flap valve. It should move towards the hot air hose (cold air position).
Fig 1: Thermostatic Air Cleaner System (Typical)
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