Smoke?
 

On cold starts, my 92' 6.5TD smokes WHITE smoke... Alot. But also after it has warmed up a bit, it'll white smoke when I rev it instead of black smoke. How do I get rid of the white and get more black smoke??

You don't want more black smoke. As cool as it may look to roll coal, our pistons just don't like the excess fuel and heat that goes with it. It sounds like either you have a timing issue, HPCA problem, or your IP may be going bad. Does the smoke have a smell?

is it coolant or fuel if it fuel maybe the glow plugs if it coolant not good

Well, I doubt it's a glow plug issue, as it still does it warm. It could be a leaking injector, retarded timing, loose timing chain, bad IP, fuel filter (black smoke at idle would indicate bad air filter), blocked or kinked return system or line. If you can get a vid up of it running we could give it a more definitive diagnosis. Smoke is a symptom, but so are idle(high and low), engine movement or vibration, smell (only seen one guy diagnose smell via a video, but it was real freaky looking), and a host of other quirks.

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As a side note, black smoke is a result of too rich a mix of fuel/air going through the cylinders. Often, this is seen when trucks at rest suddenly are given a healthy dose of right foot. The fuel flow from the IP is increased but the air is not immediately increased to compensate due to the turbo spinning up ("turbo lag"). The result is a flume of black smoke (unburned fuel) out of the exhaust. On a 6.2/6.5, we have aluminum pistons. These were prone to cracking and even melting (often seen as holes through the piston) due mostly to a leaking injector. The excess fuel would contribute to heat as well as the concentration and conduction of that heat causing major engine damage. This condition is also replicated when too much fuel is added via turning up the DB2's fuel screw, as many do this in effort to gain the black smoke. We all see the Dirtymax and Cummins guys with the black clouds streaming from their exhaust stacks, and some people think this looks cool. Others who want a 6.2/6.5 to last as long as it should but still get some noticeable power out of it will seek other means of looking cool. Cool factor goes down exponentially with the hood up, the truck on a lift, or a puddle of somethin' underneath. Just my two cents.


And anyone who wants to put a big big lift on their more-money-than-sense-mobile so they can fit those big 40" boggers but has no idea what "gear ratio" means needs to put down the wrench and back away. Just back away.

Ok, so no black smoke. The smoke does have a smell to it. When it idles it's fine, no smoke at all. and when I take off from a stop it won't smoke. when I accelerate quickly down a road it'll get a bit of black smoke off but not much. It'll white smoke when I rev the engine (letting the gassers their missing out) and at 55 degrees and down when i start it, but i see alot of diesels do that.

A small bit of black smoke when you accelerate is completely healthy. Any other smoke other than this is a bad thing, a sign of trouble. What does it smell like? Is it burned oil (blue-ish smoke)? Rich diesel? Pancake syrup (white smoke)? Any choppiness to the idle? Does the engine shake like it has a bad motor mount? I'm in the mood for fixing something so let's get to work.

No choppiness or shaking. Outta the three smells there, It'd have to be rich diesel.

you didn't pt gas buy mistake did you

NO, unless my parents were retarded and put gas in it.

If it smells like rich diesel then it could be an injector stuck open, bad timing, or a bad IP. Feel your injector lines at the injector. One may feel less hot then the others (or hotter). Also, it may have a knock at that injector. How bad is the engine's blowby?

Blowby?

mine is the same year and does the same thing when i rev it at idol, except the first time i rev it the smoke is white and after that its black. if it does that after a cold start it could just be that the motor is cold, these motors dont seem to warm up at idol very good until you drive them a few miles

Blowbly means compression loss via it getting around the piston rings and into the crankcase. It's common, but too much of it indicates excessive cylinder wear. If you take your oil cap off and see what looks like white smoke oozing out, that's blowby. If it looks like a steam locomotive from the wild west, or when you put your hand over it it pressurizes so much you can't hold it on, then you have a problem.

my 93 6.5td does the same thing with the whitesmoke but it smells like its healthy for what it is. i get smoke coming out of the oil cap but i can hold my hand over the cap for a while(until i decided to take my hand off after 30 seconds or so). the two front injectors closest to the fan aren't dry but those are the only two not dry. the truck does burn some oil though. at 70mph the truck vibrates and i can feel it in the seat. i was told that the white smok out the exhaust when warm is good and means good tuning but from what it seems like whites smoke out the exhaust even when its warmed up is not good.

man you newbes like jump to lot things i not even going to comet on this

Hey, I'm still in my teens so I still got questions...

ask away


that what here for help one other


are you going thru coolant

Crazy's rite u r looking to deep process of elimination like if truck has constant miss maybe fuel prob. or it is cutting out at certain times under certain conditions it could be electrical u dont have to look so deep easy stuff first!:c:

i hate to invade on your post my 98 6.5 white smokes alot as well, it also has the smell of unburned diesel and a seemingly bad motor mount(but they arnt bad) what could this be?

white smoke at start up or all the time?

PM me because you dont wanna highjack this thread

You already have your own thread rolling on this subject:

https://www.dieselbombers.com/chevy-...uid-dampr.html

Go check there.

:pca1: