I need professional opinion from Video of acceptable blowby from 7.3 - Ford Powerstroke Diesel Forum
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Old 08-19-2013, 12:53 PM
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I need professional opinion from Video of acceptable blowby from 7.3

I have a creampuff 1997 Ford. You know, the kinds with 110,000 miles and has always been garaged / never used for anything. Anyway, I notice i have alot of blowby coming from the oil fill cap and i am very concerned. I please ask anyone here for their opinions on whether this amount of blowby is acceptable or not? I have a 45 second video right here for all of you to see.
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Old 08-19-2013, 01:02 PM
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every 7.3 has blow by.

if your trying to see if its bad, take the cap and put it upside down over the hole. if it gets blown off then you have too much blow by. if it just slowly moves off then your fine.
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Old 08-19-2013, 02:29 PM
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Is this amount as seen in the video excessive to any of you with experience with this type of engine? Any feedback would be appreciated, I am being told this is above normal and my rings could be failing or my headgasket is blown.
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Old 08-19-2013, 03:46 PM
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looks like mine.
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Old 08-19-2013, 03:54 PM
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@ campbellflage...Is your 7.3 healthy? How many miles on it?
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Old 08-19-2013, 04:05 PM
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210k on mine, runs perfect
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Old 08-19-2013, 04:06 PM
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try the lid test as stated by the other member, flip it over and set it on there. If it vibrates around and falls off its ok, but if it gets blown off then its probably a little excessive.
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7.3 blowby, blowby, potential engine failure

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