exhaust question

[slackjawsk5]

hey guys i was wondering what would cause whitish grey exhaust to pour out only on of my tail pipes. the engine sounds good, thought it could be a head gasket or something what do you guys think

 

[blackblazer717]

is it after the truck warms up or when its cold, your question is very short and not a whole lot of info.
im guessing all the time but i say a leaky intake or head could be the culprit. i had a intake gasket go on a 305 and it poarded white til i change them....

LUKE
just a thought

 

[goldwing2000]

Yep... sounds like steam.

Head gasket, cracked head or cracked cylinder wall.

 

[dave_90_blazer]

which tail pipe, and what trans are you running?

if a trans with a vac. modulator(350/400) and the vac line is to a runner on one side or the other(I have seen most to the runner for #8 cylinder, pass side) , and the modulator is bad, it will suck trans fluid into the runner



p.s., trans fluid burns white

 

[1-ton]

If it is grey, it could be running too rich. A rich mixture cuases grey smoke. coolant causes white smoke. try the smell test on your exhaust. If it has a sweet smell it is coolant. If it is gasoline, then it will have a chemical type of smell.

 

[goldwing2000]

Last I checked, too rich caused black smoke.

 

[dave_90_blazer]

Last I checked, too rich caused black smoke.

just slightly rich is grey

 

[1-ton]

Last I checked, too rich caused black smoke

Black smoke is normaly a sign of burning oil.

Black smoke = oil

White smoke = water

Grey smoke = gas

But this is not written in stone or anything.

 

[goldwing2000]

Black smoke is normaly a sign of burning oil.

Black smoke = oil

White smoke = water

Grey smoke = gas

But this is not written in stone or anything.

I think you got your gas and oil backerds. Oil definitely produces whitish/blueish smoke. I get reminded of this every time I start my Blazer.
I suppose grey could be taken for blue so it could be an oil burning issue. And if there's that much oil burning, then the transmission vacuum line is definitely a good place to start looking.

Just to coroborate: http://www.bellaonline.com/ArticlesP/art10101.asp

 

[slackjawsk5]

if the vaccum modulator is bad will that make the engine lack power

 

[dave_90_blazer]

it would definately effect transmission shift timing/quality(which can be mistacken for power issues) and the oil can foul the plug/s as well

 

[slackjawsk5]

thanks guys ill have to try that