White Smoke
Thread Starter
|
Senior User
Joined: Dec 2016
Posts: 129
Likes: 1
White Smoke
It may have been talked about but I’m on the road and the search function is not working on my phone. My truck is blowing white smoke at idle. It clears up but what is causing this. It’s the 6.7.
Cargo Master
Joined: Oct 2015
Posts: 2,745
Likes: 72
From: West Virginia
Are you sure it's not steam?
White smoke is usually caused by coolant entering the combustion chamber. Unless you have a cracked block, that's not likely on a new(ish) truck.
When it's very cold outside and the engine/exhaust haven't fully warmed up, white "smoke" is very common during idle. It doesn't come out of the pipe with any real force and quickly dissipates, while actual smoke would accumulate and kind of come out in pulses as the piston(s) with the leak force the gas out.
White smoke is usually caused by coolant entering the combustion chamber. Unless you have a cracked block, that's not likely on a new(ish) truck.
When it's very cold outside and the engine/exhaust haven't fully warmed up, white "smoke" is very common during idle. It doesn't come out of the pipe with any real force and quickly dissipates, while actual smoke would accumulate and kind of come out in pulses as the piston(s) with the leak force the gas out.
Fleet Mechanic
Joined: Jan 2015
Posts: 1,377
Likes: 292
From: SE Michigan
Technically, if it's white, it's not smoke -- it's steam. That said:
Blue exhaust smoke = burning oil
Black exhaust smoke = fuel mixture rich
White exhaust "smoke" = coolant in combustion chamber
You'll get light white "smoke" early in the AM @ start up if you have condensation that has built up, but that shouldn't last for long.
If it's heavier white "smoke", don't drive it. Get it to the shop ASAP.
Blue exhaust smoke = burning oil
Black exhaust smoke = fuel mixture rich
White exhaust "smoke" = coolant in combustion chamber
You'll get light white "smoke" early in the AM @ start up if you have condensation that has built up, but that shouldn't last for long.
If it's heavier white "smoke", don't drive it. Get it to the shop ASAP.
More Turbo
Joined: Apr 2011
Posts: 543
Likes: 33
From: Extreme NW Ohio
Trending Topics
Thread Starter
|
Senior User
Joined: Dec 2016
Posts: 129
Likes: 1
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
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
Thread
Thread Starter
Forum
Replies
Last Post
mjnoakes
1999 - 2003 7.3L Power Stroke Diesel
1
Dec 16, 2003 02:36 PM
GAPS-54
Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460)
1
Nov 10, 2003 03:24 AM