Smoke Colors

[Digital Oxygen]

We all know that black smoke is an indicator of overfueling, right?

What are other smoke/exhaust colors indicative of?

Like for example, mine has a bluish/white tint to it. you really can't see it expcept if you put a flashlight to it at night. When I start it up cold, it puffs out a little blue/white smoke, and then it goes away once the motor is running.

I've also seen grey smoke when people put their foot into their diesels.

Any thoughts?

 

[BamaSixGun]

not real sure about this, but when my EGR cooler went out, it blew out a white smoke because of the coolant going thru the exhaust.

and as far as the bluish smoke, i thought that meant an injector problem, i am not 100% sure, seems like i have heard that before, but i could be wrong.

someone with the right answers will be along shortly i'm sure.

very good questions tho!

 

[fordtrucker4life!]

at work we had a ford 7.8 liter inline 6 in a L8000 truck and it was smoking blue/white on start up. Ended up having to rebuild the injector pump no more smoke.

 

[bushpilot]

In a diesel BLACK THICK smoke is a sign of over fueling.

in just about any engine, whiTe smoke is STEAM...and is a
sign of coolant or water entering the combustion chamber.

on a gasser...blue smoke is OIL...on start up (cold) its typically
a sign of valve guides (top end) oil leaking down onto the top
of the pistons.

on a gasser...blue smoke under heavy acceleration or letting
off is typically a sign of RING or cylinder wear (oil blowing by the rings).

black smoke on a gaser is also a sign of over fueling/rich mixture
but it typcially wont be as thick as a diesel...and will come w/
rough running under acceleration.

 

[Digital Oxygen]

Ok, we got the gassers covered. What about diesels?

 

[powerboatr]

In a diesel BLACK THICK smoke is a sign of over fueling.could be as simple as the air filter clogged up, or your tuner/chip

in just about any engine, while smoke is STEAM...and is a
sign of coolant or water entering the combustion chamber.
diesels to
on a gasser...blue smoke is OIL...on start up (cold) its typically
a sign of valve guides (top end) oil leaking down onto the top
of the pistons.Injector O rings maybe to or even injectors leaking down,

on a gasser...blue smoke under heavy acceleration or letting
off is typically a sign of RING or cylinder wear (oil blowing by the rings).
same, and again injector O rings leaking

black smoke on a gaser is also a sign of over fueling/rich mixture
but it typcially wont be as thick as a diesel...and will come w/
rough running under acceleration.

light brown sooty color under hard acceleration ... NORMAL
and if your IC is really full of oil you could get a bluish smoke getting on it.

Ok, we got the gassers covered. What about diesels?

thanks bush, maybe its a barney day
i added color for you D.O.

 

[bushpilot]

Ok, we got the gassers covered. What about diesels?

maybe my explanation wasnt clear enough...maybe the smoke is
TOO think

w/ the exception of the THICK BLACK smoke (over fueling) in
a diesel everything else would be the same as a gasser !

 

[platinum01]

maybe my explanation wasnt clear enough...maybe the smoke is
TOO think

w/ the exception of the THICK BLACK smoke (over fueling) in
a diesel everything else would be the same as a gasser !

Hello Mac Fly is anybody in there??? LOL. It is only Tuesday though

 

[Digital Oxygen]

Hah! thank you gentlemen. I will have to stop by and talk to my melocal FORD tech.

 

[lvtitan]

we all know a little white smoke during warm up on a cold day is normal,
but white smoke on a diesel could also be indicative of a clogged air filter.
i'm around diesel engines all day at work as heavy equipment operator.