Diesel Bombers - 6.5 smoke white on start up

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Diesel Bombers (https://www.dieselbombers.com/)

- Chevy/GMC 6.2L and 6.5L (https://www.dieselbombers.com/chevy-gmc-6-2l-6-5l/)

- - 6.5 smoke white on start up (https://www.dieselbombers.com/chevy-gmc-6-2l-6-5l/89519-6-5-smoke-white-start-up.html)

Crazy

01-25-2012 10:17 AM

Quote:

Originally Posted by great white (Post 848731)

Not sure what you guys got going on, but my 98 is good down to -20c (not plugged in) on a cold start with nothing but a quick puff of black and then clean running.

Now, pretty much everything is new (1 year or less) under my hood which is prob part of my trucks "good manners"

If you've got big rolling clouds of white or black, check your glows and glow circuit, or your engine isn't as healthy as you may think it is. Even one bad glow plug or a cylinder down on compression will give you symptoms like these in the cold.

Something is "off"....

You are just one of the lucky ones most of these truck will put white smoke on first cold or hot

great white

01-25-2012 12:16 PM

Quote:

Originally Posted by Crazy (Post 848762)

You are just one of the lucky ones most of these truck will put white smoke on first cold or hot

Lucky?

Nope.

Everything up to snuff?

Yup.

---AutoMerged DoublePost---

Well, I should also mention I have reflashed my cold start glow cycle and afterglow in my PCM.

Not as much a factor with the duraterms, but every bit helps.

My trucks good starting manners are mainly accountable to new glows and a brand new GEP engine...

urban-burban95

01-25-2012 08:01 PM

Apparently brand new motors don't smoke white on start up, they smoke black? I'm missing something here but thanks for the input great white

great white

01-26-2012 03:58 AM

Quote:

Originally Posted by urban-burban95 (Post 848976)

Apparently brand new motors don't smoke white on start up, they smoke black? I'm missing something here but thanks for the input great white

The white smoke is normally raw diesel, the black smoke is partially burnt diesel.

White smoke is normally a bad glow plug, old glow plugs that don't quite reach temp or something not quite up to par in the glow circuit.

An engine with a good reciprocating assembly (ie: ring sealing) is just a cleaner burning unit than a tired engine and gets with the program faster on a cold morning.

ebarresi5894

01-26-2012 10:38 AM

all white smoke is is diesel fuel that isnt burnt hot enough

Brian Troglin

11-20-2014 12:21 AM

So a lot of white smoke for like 3 to 5 min. Means I have really bad glow plugs right. What if I'm driving and have white smoke

Mayhem

11-20-2014 06:38 AM

Quote:

Originally Posted by Brian Troglin (Post 1080418)

So a lot of white smoke for like 3 to 5 min. Means I have really bad glow plugs right. What if I'm driving and have white smoke

White smoke on startup is a good sign that GP's are bad or the controller is not functioning properly and if you have white smoke while driving you could have trash in the injectors or they need replacing try some Seafoam in the fuel tank this may clear it up if they are not to far gone.

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