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Old 09-03-2018, 12:58 PM   #1
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AOS change

Started getting some smoke at start up that I never had and according to this fórum and the test they recommend, opening the oil filler it looks like I have to change my AOS. I got the new one the other day and it doesn't look like there is anything that can go wrong with it. How does it fail?
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Old 09-03-2018, 04:21 PM   #2
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Theres a few threads where it's been documented how. Plastic diaphragm cracks and allows too much vacuum. You can find them if you search.
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Old 09-04-2018, 05:11 AM   #3
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Thanks, I was just curious as it looks like a rather fool proof piece of plastic.
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Old 09-04-2018, 07:49 AM   #4
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Quote:
Originally Posted by tanque55 View Post
Thanks, I was just curious as it looks like a rather fool proof piece of plastic.
Plastic being the keyword. As I recall theres a lot of vacuum on that plastic and when it fails or cracks you have your issue. There is a really expensive racing aos made of metal that is built to withstand a lot more torture.
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