Excessive blow by... possible engine failure? (video)

rdwngs444 · #1 (**permalink**) 12-04-2010, 05:44 PM

I took this video of my truck tonight after i was told by a buddy that it has way too much blow by. I checked 2 other 6.4 and they had zero blow by. My truck only has 40k miles. Let me add that i experience no loss of power, boost, mpg, or anything odd from my truck. Im taking it to Ford on monday. What do you guys think?

YouTube - Excessive blow 6.4

AW794 · #2 (**permalink**) 12-04-2010, 06:13 PM

Completely normal. It's oil vapor from the crankcase ventilation system.

**dieselkane** · #3 (**permalink**) 12-04-2010, 06:20 PM

Mine makes just as much, if not more than your truck. It's normal for the 6.4's. I have checked several others as well. Did you make sure the other trucks you checked with zero blow by had their engines warmed up? You won't notice it so much when it's cold. But once the engine is warm it becomes really noticeable.

AW794 · #4 (**permalink**) 12-04-2010, 07:23 PM

It happens on all internal combustion engines when the pcv system is removed or in this case modified (removing the cap)

rdwngs444 · #5 (**permalink**) 12-04-2010, 07:28 PM

Both trucks I checked were cold, thanks for the quick replies guys, reassuring to say the least. Im gonna go check again when my truck is cold.

**dieselkane** · #6 (**permalink**) 12-04-2010, 08:58 PM

Quote:

Originally Posted by rdwngs444

Both trucks I checked were cold, thanks for the quick replies guys, reassuring to say the least. Im gonna go check again when my truck is cold.

After you check, please update with what you found out

rdwngs444 · #7 (**permalink**) 12-05-2010, 01:44 PM

Quote:

Originally Posted by dieselkane

After you check, please update with what you found out

Just a quick update, i went out this morning to look at the blow by and noting, truck was completely cold and no signs of blow by at all. Im still going to take it to Ford monday to check things out but seems like its ok.

Dietoremain · #8 (**permalink**) 12-05-2010, 01:47 PM

very normal.. these engines have very high compression so therefore more blowby than a gasser.

**dieselkane** · #9 (**permalink**) 12-05-2010, 02:10 PM

You could check some other trucks again just to compare it to, but make sure they are up to operating temp.

powerstrokedub · #10 (**permalink**) 12-05-2010, 07:29 PM

Mine has just as much when its warm man, no worries! My cousins does the same thing too.

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