Help! Engine smoke!

OK.. so recently purchased an LCE header and I attempted to install it last night but it got dark earlier than expected and I live in an apartment complex with no garage so I had to call it quits. I reassembled everything that I had taken off, which only happened to be the air intake and a few bolts on the heat shield and the other stuff right above the heat shield. So this morning, I checked the forecast and we are supposed to get heavy showers today so I realized I had to do this some other time. Went out to double check that everything was plugged in.. All hoses and everything else is properly plugged in. I plugged back in the battery and attempted to start the engine just as a double check in case I needed to go somewhere.. Everything turned on fine, but smoke started immediately coming out of the engine bay so I turned it back off. This was alarming, but I am assuming there was some debris from the rusted bolts that got onto the stock manifold. The smoke was coming from under the heat shield. What do you guys think about this? I don't see what else would have caused the engine to smoke from the limited amount of piddling I did yesterday. Will WD40 or the small debris from the bolts smoke when present on the stock manifold? I'd like to just not drive it til I put the header on but I dunno how long this weather will last, which was the reason I didn't finish assembly in the first place.

 

Possible some extra oil got on to it or little bit of debris

 

wd40 will smoke . thats what i would think it would be. how long did you let it run?

 

Thats what I figured, and i did some research and there seems to be other stories of people getting WD40 on their header and causing smoke to pour out. nonetheless its not a good feeling when you see smoke coming from your engine

 

Like 20 seconds. I saw the smoke and was like oh shit what have I done???

 

Okay just ubolt the heat shield and let the truck run and look at the headers see where it's smoking from

 

lol. i have done the same thing on another truck and had the same reaction.

 

alright. well I'm gonna run the truck a min or two to see if it dwindles down. I just dont see how I could have fucked something up with the engine by unscrewing and rescrewing bolts and unplugging replugging tubes. If so, I dont need to be working on my truck. Ill report back haha

 

Engine smoke went away mostly. Smells like shit though!

 

Most likely the wd40 I changed my exhaust out and the muffler was tight so I put some hand cleaner from work around it to get it together. Let's just say I put on a smoke show haha

 

the smoke was prolly coming from the new header lol no worries