Engine has not been run for 2+ years, a lot of smoking

[DjPantsSpecR]

Okay i hope i remember everything here. The car is a 92 240sx. And it has only sat for about 5 to 6 months. The motor is a 95 DE, and only the head and block was used. However, because the valvetrain looked so dirty i put in new Nissan crank and rod bearings, everything was checked with plastigage, and it was all in spec.

I was a moron and when i reinstalled the upper intake manifold, there was still old gasket stuck around where the coolant enters the head. So when i added coolant it was easy to see i had a leak. So the old gasket chunk was removed and the leak was gone.

The battery was too weak yesterday so i primed the oil pump and then i gave it a few cranks. A lot of smoke coming out the tail pipe, but it didnt fire. I let it sit for about 8 minutes, and cranked it and it fired then died. I charged the battery all night and didnt touch it til this morning. It fired up very weakly at first but quickly was running well.

It never stopped smoking, and the smoke didnt smell like fuel, oil or coolant. At first there appeared to be an exhaust leak in the engine compartment too, but it must have been oil on something because it eventually stopped.

I let it idle, giving it rpm occasionally to up the oil pressure, for about ten minutes. The smoking went down considerably, but when you gave it rpms the smoke would come back. I never let it run enough to see if it would entirely go away, because i certainly don't want to do any damage, and i also broke the spade on the thermal transmitter unit, so i have no temp gauge (not til next wednesday)

sorry this getting long, but i just wanted to know if this was common when just starting a motor that hasnt run in years, or is it assmebly lube, or just any suggestion you have to put me at ease

[le_ryan]

may be old gas, it will smoke some......as for all els , not sure..

[georgeNCSUee]

I got my 95 240SX from an auction and I think it had been sitting with those guys for about 1 year. I didn't really know what the condition of the car was so I poured some Mystery Oil (I think that's what it was) in the cylinders, took out old gas and let it sit overnight. Next day, when I started her, smoke was coming from engine and the back. I almost couldn't see my neighborhood anymore. I ran it for a while and smoke was getting less. Then I think it smoked a little (when revved) the day after that and then no smoke at all. I don't know if it was the old gas or the Mystery Oil that was causing the smoke, but I don't think it caused any damage on mine. Good luck with yours!

[DjPantsSpecR]

yep, i fired it up a little later yesterday to show someone what i was talking about. I didnt even really need to crank it, and it fired right up

And of course just because i was trying to show someone how bad it was smoking, it stopped smoking. thanks a lot anyways guys