Quote:
Originally Posted by Flavor 987S
With the motor running, if you remove the oil fill cap, is there suction? If so, this would further make the AOS suspicious of failure/failing. Not uncommon.
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Hello, I remove the oil fill cap, there is suction, but a very light suction. Also, when remove the cap I ear a noise inside the engine like a pressure cooker, the engine make some variations in revs, but not stopped. I think this noise come from AOS, but is normal or is a sign of failure?