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I have a 305 engine that I just rebuilt.  I fired it up for the first time and it's pouring out tons of white smoke.  Everyone says it might be the lithium grease that I used when putting the engine back together(I packed the rings really good with that stuff).  It dumps out so much smoke so fast that I can't leave it running very long without fear of pissing off my neighbors.  Can anyone please tell me what might be going on?  I replaced the rings, had the heads magnafluxed and resurfaced along with new valve guides and seats.  All the gaskets came with my engine rebuild kit.  I haven't ran a compression test yet as the engine smokes too dang much.  I know the whole blue = oil, white = water/cooland and black = fuel smoke thing, but I don't know for sure if this is coolant.  The oil is still new and appears to still be clear bu the engine has only ran a few times for a few minutes each time.  I pulled the vacuum line for the modulator valve and the brake booster and it still does it.  Can anyone give me any ideas?  I really appreciate it.  

could be burning coolant, typical cause of wrong head gasket placement (inverted)  

If you put Grease? on the rings, then you need not look further. You'll just have to burn it out. It will probably smoke for quite a while. It will also prevent the rings from seating properly for some time. Always wipe the cylinders clean with a slightly oily rag when assembling the engine. They do not need to be greased. I usually run the oil pump with a drill before starting the engine for the first time, until it comes out of the pushrods. At least you won't see many mosquitoes around the shop for a while. It should be fine, just run it late at night until the smoke clears. If it was coolant in the cylinders the exhaust would smell sweet.

Good Luck
Doug  

Thanks for the info. The headgaskets were labeled in such a way I don't think outsourced support could get it wrong, but you never know. I believe the grease may be causing it as the oil is not milky yet and there isn't any liquid coming out of the exhaust and it stinks to all heck. It isn't sweet at all.  I did prime the oil pump before dropping it back in the truck and made sure that each rocker was pumping good clean oil. I'll sneak back out there tonight and let it run a good 30 minutes or so checking the oil and coolant every few minutes.  I'll let yall know what happens.  

Well, the oil is definately clean and there are no bubbles coming out of the radiator.  The exhaust is still thick as ***  I mean really thick.  I can't run it even at night because someone might think a house is on fire.    I guess I'm gonna have to tow it out to my parent's house in the country and let it run out there.  

So I guess I'll be pulling the heads to find out what's going on with the dang smoke.  I was wondering though, is there anyway to kinda diagnose which side of the engine is causing all this?  I don't want to think that both are wrong.  

I'd pull the sparkplugs and see if you can see something different on one or more of them. If it's burning something the plug should show it. They should look new, not black and sooty.  

I pulled the plugs and every one of them were coated with coolant.  After pulling the heads I saw that every cylinder had a little coolant in them.  I went to AutoZone and matched the head gaskets currently on the truck with ones off the shelf and they were the exact same thing.  So went ahead and bought the new ones and this time I torqed the bolts down to 80lbs instead of 65lbs.  Guess what, same dang thing.  I made sure no ports were being blocked and everything went back together like it did the first time.  I just can't seem to figure out what's causing this.  I'm going to go ahead and park the truck at my dad's house until I can find a reliable 350 to drop in it.  Does anyone know why this would continue to happen?  I checked the block for cracks, the heads were machined and fluxed.  No warping or crack there either.  

funny I have the same problem,,,, have the intake manifold checked cause the coolent can be getting mixed in with the gas bowl, causeing her to burn white.  

I know this post is from 2007 and its 2009, but I was searching for awhile so wanted to throw in my information for the next person searching.

I completely rebuilt an Acura Integra engine, greased everything up as well...used grease, not pre-assembly lube. I had tons of white smoke coming from the engine as well. So much that it looked like my house was on fire.

Well I ran the engine for about 30 mins (brand new engine mind you) and it finally didn't smoke as much. So I'm assuming its the grease that you use that will be stuck in the engine till it really burns off and is replaced with the motor oil. When I rev the engine there is still white smoke, but it's minimal, so I'm assuming that its still the grease. Also make sure you replace your engine oil in the first 50 miles or so during your break-in. Make sure your not recirculating any shavings that will occur during the break-in.

I haven't driven the car yet (haven't bled the clutch), but if this happens, and you assembled the engine with grease, then just run it for awhile (the radiator fans came on about 5 times before I shut it off. My engine oil is still brand new as well. I haven't checked the spark plugs just yet either. Will tomorrow in the morning.

Hope this helps the next person that runs into this.  

Did you make sure that when you replaced the head gaskets that you cleaned the heads and the block thoroughly.  Also, did you check to see if when you cleaned them off that you didn't gaugethe surfaces?