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Old 02-28-2019, 08:40 PM   #15
maytag
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Join Date: Mar 2018
Location: Utah
Posts: 2,446
Quote:
Originally Posted by JFP in PA View Post
Not necessarily. The optimum method to test the condition of the AOS is to use a digital manometer attached to an old oil fill cap. Warmed up, the system should read 5 inches of water or less; if it reads higher, or you read pressure, it is toast.
JFP, you've probably seen a bunch of these over the years, yeah? (I mean the cam plug popping out)
What's been the most common cause, in your experience?

If my opinion below was way off the mark, I won't be offended if you correct me, haha.


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