smoking when hot

[camd64]

so for the past couple of days my 318 has been smoking out the tailpipes when it warms up. when it is cold or just warming up its fine, but as soon as it reaches operating temp it starts to belt out a light greyish smoke and it smells more like gas than anything. the motor is barely over a year old after a complete rebuild. it has hardly any miles on it since i only work about 3 miles from my house and i only drive it about twice a week. i thought maybe the choke was stuck on but it was wide open when it warmed up and i even pulled the airhorn off to see if something was wrong inside but it all looks good. it is coming out of both pipes and i don't have a crossover pipe so it has to be something common to both sides correct? anyone else have any ideas?

 

[chasduster]

hmmmmmmm....Possibly a good carb cleaning and retuning the carb I doubt it is anything major...you need to mover farther away so you can drive it longer LOL...I would wait till some of these motor heads jump in...

 

[memike]

I would take it on a good 50 mile drive and watch the temp, Gas is a black smoke, and check your dip stick for a gas smell 8)your carb may be dripping gas in your oil and that could be the smell you are getting. Change the oil as soon as you can if it has gas in it. Hope this helps, It has happened to me before, I thought my old truck was doing good and not using oil, But gas was just keeping it full. Just a thought.8)
let a tec jump in here.:clock:

 

[6pk2goDemon]

Just an off the wall suggestion here. Take it on a drive every once in awhile and blow it out.....55+ for a few miles.

Someone else will know better, but if you're only driving 3 miles, the engine is never really getting warmed up enough....

 

[camd64]

so i went out after the motor cooled off and fired it back up, no smoke again till it warmed up. then i started poking around and noticed when i pulled the pcv out while it was running it also is smoking through there? tomorrow i'm going to pull the plugs and do a comp. and leakdown on it. but im thinking maybe, hopefully, something like a bad intake gasket? im thinking it could be sucking oil through the underside of the intake? thanks guys for your help.

Mike i did just check the oil and its clean and no fuel smell. i just changed it last week and that all looked normal. so far at least.

6pk i try to drive it every once in a while and rip on it pretty good but i know i should take it out for longer drives. hopefully the cruise nights start up again so i have more of a reason to get out of work and take the old dart out.

chasduster i thought i might have had a carb issue at first but after tearing into it all looks ok.

 

[dodgetkboy78]

Sounds like.........

You have blowby.........

Or the smoke you see out the pipes is the gas in the oil like tey suggested.

Check your timing? (retarded timing can cause blow by AND smoke)

Is it running rich? (The correct mixture at an idle is too rich a mixtyre when warm)

Turn the idle up to about 2000 and see if it still smokes.

 

[camd64]

i really hope i didn't crack a piston ring. as far as the timing and carb. setup its all where it should be. i'm running 14 btdc and about 36 total and the carb mixture screws are set to 1 1/4 turns out but i did have to change the rods and springs out but thats because it was running too lean (1406 Edelbrock). with that setup it ran great until now. i thought it was a weak spark issue and on another thread here i wrote how i found the voltage at the coil seemed low but even after solving that with a lower ohm ballast resistor it still is smoking.

 

[dodgetkboy78]

Uhm.

A 1406? You should be about 3 turns out, if you have any cam.
If it was running lean, you may need to change for a richer jet, as well.


Tell me what jets, springs, and rods you are running.

IF, you richened it with rods and springs, you went too heavy on the spring. So now, I bet your needles are bouncing in and out of the jet at idle, causing it to idle rich, kinda extremely fast intermittently. (MAkes sense with the LEAN LEAN LEAN idle screw adjustment.)