View Single Post
Old 02-28-2019, 11:55 AM   #14
JFP in PA
Registered User
 
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,261
Quote:
Originally Posted by dmonk View Post
No, I haven't tried removing the cap while idling. So if my AOS has failed, shouldn't I have a check engine light or something?
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.
__________________
Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
JFP in PA is offline   Reply With Quote