Quote:
Originally Posted by Mark_T
So, on the topic of AOS replacement, I understand the simple test for a failing AOS is to remove the oil breather cap, then place your hand over the tube and see if there is suction.
My question - is a little suction normal? Or does feeling any suction at all indicate a failing AOS?
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The correct way to test it is with a digital manometer; you are looking for 5 inches of water warmed up, anything over that and it is on the way out.
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