Blowby maybe an issue

[Baker42]

I decided to do the blowby test by starting my truck and checking for smoke with the oil fill cap removed and to my surprise I had smoke at a steedy stream and seemed to increase the longer it idled. Could it be the valves ( best case senario) or am I looking at a larger issue. Any EXPIERIENCED info would be greatly appreciated. Thanks PSA

 

[Baker42]

Bump

 

[ghohouston]

If you flip the cap upside down and set it on the fill tube, will it blow it off or just kind of shake there? My 7.3 had quite a bit of visible blowby at idle, especially when it was warm outside, even though it compression tested well through all cylinders, although I never actually measured blowby with a gauge. It ran just fine.

Heres a video I took of it last summer
https://www.youtube.com/watch?v=sN65PhwFt1k&feature=youtube_gdata_player

 

[ghohouston]

Granted this is a video I took of a 6.4 at work, your truck should not do this
https://www.youtube.com/watch?v=j8fUllbhAos&feature=youtube_gdata_player

 

[Baker42]

Thanks for respond I will try that tommorow. Truck runs strong and does not burn any oil. Just never thought to check till a friend suggested it. Now a little worried. Maybe a worn seat on the valves is all I could think. Thanks

 

[Baker42]

riest:Not that bad 4 sure but still makes me escared

 

[ghohouston]

Its a 7.3 buddy, just drive it an be happy

 

[Baker42]

Thanks bud

 

[Baker42]

Still escared tho

 

[Baker42]

Dont see how it could be rings. Used to be a mechanic in another life,but what does a plummer know.

 

[89 Stroker]

if it sides off then your good , but blows off then not soo good , but like said its a 7.3 just drive it