Tons of light smoke!

[Hyboost]

Just bought my first GN. Got a 86, really nice shape, but the last owner ran it hot, (fan relay ) started smoking on the way home, they parked it and there it sat for 2 years. I bought it Sunday, Dumped the old fuel, check fluids, oil, coolent both looked clean. Put a good battery in it and tried to turn it over. A surprise to me, it started right up, ran and Idled fine, no smoke for around 1 minute. Then it really started smoking, big time! It was whitish but didnt smell like coolant, it really didnt smell like oil either. Anyhoot, I checked the plugs and they were all fairly black, no bleached out white ones like I expected. I pulled the heads off anyhow, head gaskets, and intakes were fine. I'm sending the heads to a speed shop in my area, to see if the seat/seals are shot. Could a shot turbo seal cause this problem, throwing raw oil through the exhaust/intake side? I'm stumped due to the heads being slightly carboned up but not really oil stained, and the plugs were not that bad. Please help if you can.
Thanx a ton, Ken, Lancaster NY. e mail if you want, icepicker62@yahoo.com

 

[redhotrod]

Did you happen to drive it around the block or anywhere? I'm thinkin condensation built up in the pipes over the time it sat and after the pipes warmed up, started steaming the water out. Anyhow, you already got the heads off, do yourself a favor and port those little holes that lead from the valves, and gasket match that intake manifold too!

 

[Hyboost]

I don't think so, this was nasty, bug killing kind of smoke. And the last owner had the same problem the last day he drove it.

 

[redhotrod]

It shouldn't be the turbo, the turbo would only leak oil, oil burns blue out the exhaust, white would be water, and black is gas.
I would be looking for a crack in the block if the previous owner ran it that hot and smoking that much, sounds like after the block warms up and expands from the heat, the crack is letting the water through. Examine your plugs real close, see if you can find any green anifreeze crystals on them.
When I first put my motor together, I had 2 turbos that came with the motor, I somehow picked to install the bad turbo, that did the same thing, ran good, but after a minute, man, smoked out the whole neighborhood, it was light blue smoke. Check to see if the turbo compressor wheel(inside the throttle body) is wobbly, indicating bad bearings. If so, time to fix up a turbo

 

[Hyboost]

Thanx redhot, I'll give it a try, I'm learning!

 

[jastrckl]

Oil can burn white, like if a rear main seal goes and drips oil onto the crosspipe which then burns off (ask me how I know ). Same thing for turbo if a seal in it goes bad. Oil smoke is blue if it burns -inside- the chamber. Turbo seals will smoke as soon as you start it, at idle like. A rear main seal will smoke when you 'get on it' and oil gets splattered on the crossover. I think the seals leak more when the crank spins faster too.

 

[Hyboost]

Checked plugs with magnifing glass with light, not coolant what so ever on them, No coolant in oil, and no oil in coolant, so I'm going with a blown turbo seal. There is quite a bit of (pooling) oil in the hose coming from the intercooler to the throttle body, and there is a little at the throttle body inlet, so it has to be coming from the turbo. I tipped the intercooler upside down, and it sat there for a day, but no oil came out, ,,, But still, I think its the problem. The turbo bearings have very little, to no end play, and the turbo fins don't seem too oily. So shot in the dark, ordering a turbo, sending the heads out, getting a new cam, lifters and h.p valve springs, and double roller chain set, new 36 or maybe 40 lb injectors. Complete gasket set, (slight rear main leak) fuel pump and hot wire kit, high pressure oil pump. Boost and oil pressure gauges. Any suggestion on turbo?