Blowby video. How bad?
Postmaster
Joined: Jan 2009
Posts: 2,667
Likes: 1
From: Glen Rose,Texas
I think the real test is to take the oil fill cap off and turn it upside down on the fill tube.If it just rattles off that is normal.If it is blown off by internal blow by then that is bad.
Postmaster
Joined: Jan 2009
Posts: 2,544
Likes: 4
From: Suffolk, VA
Looks like a bit more than what I see on mine but it didn't blow the cap off. If its really cold out there maybe some of that is steam? Its the velocity of what I see that im sure about. Mine doesn't push out so fast.
Thread Starter
|
Senior User
Joined: Aug 2006
Posts: 122
Likes: 0
Post Fiend
Joined: Sep 2003
Posts: 6,096
Likes: 26
From: Mesa AZ
Is that a new engine? How many miles/hours so far? Sounds nice If it's a recent rebuild, then the blowby seems about normal to me.
Just my $0.02...
Just my $0.02...
Trending Topics
Thread Starter
|
Senior User
Joined: Aug 2006
Posts: 122
Likes: 0
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!
Joe Kucinski
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!
Michael S. Palmer
The Best F-150 Deal of Every Trim Level (XL through Raptor)
Joe Kucinski
Post Fiend
Joined: Sep 2003
Posts: 6,096
Likes: 26
From: Mesa AZ
Hmm, 10k miles? In that case I think the blowby is excessive. Has it been like that for the entire 10k miles? Have you had the CCV mod since the rebuild or did you just recently run it to that spot behind the cab? I am wondering if maybe the hose froze up recently and the engine didn't have anyplace to vent the crankcase pressure. 
Post Fiend
Joined: Sep 2003
Posts: 6,096
Likes: 26
From: Mesa AZ
You said "got it back 10k miles ago"...so I assume that means you had someone rebuild it for you? If it smoked like that since day one then I would take it back and see if they'll correct their work. I would expect some blowby on a fresh rebuild but it should clear up pretty quick...maybe 500 miles at the most.
Plug the CCV hose, put the oil cap on upside down and start the engine. If it blow right off then something isn't right.
EDIT: To clarify...if you plug the CCV and start the engine with the oil cap upside down it might topple off and that wouldn't necessarily prove anything. But if the cap shoots off like a projectile, then you probably have an issue. (sorry for the confusing post...)
